├── .gitignore
├── CyclePageView
    ├── SYACyclePageTransformLayout.h
    ├── SYACyclePageTransformLayout.m
    ├── SYACyclePageView.h
    └── SYACyclePageView.m
├── LICENSE
├── README.md
├── SYACyclePageView.podspec
└── SYACyclePageViewDemo
    ├── SYACyclePageViewDemo.xcodeproj
        ├── project.pbxproj
        └── project.xcworkspace
        │   └── contents.xcworkspacedata
    └── SYACyclePageViewDemo
        ├── AppDelegate.h
        ├── AppDelegate.m
        ├── Assets.xcassets
            └── AppIcon.appiconset
            │   └── Contents.json
        ├── Base.lproj
            └── LaunchScreen.storyboard
        ├── CyclePageView
            ├── SYACyclePageTransformLayout.h
            ├── SYACyclePageTransformLayout.m
            ├── SYACyclePageView.h
            └── SYACyclePageView.m
        ├── Info.plist
        ├── Main.storyboard
        ├── TYCyclePagerViewCell.h
        ├── TYCyclePagerViewCell.m
        ├── TYPageControl.h
        ├── TYPageControl.m
        ├── ViewController.h
        ├── ViewController.m
        └── main.m


/.gitignore:
--------------------------------------------------------------------------------
 1 | # Xcode
 2 | #
 3 | # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
 4 | 
 5 | ## Build generated
 6 | build/
 7 | DerivedData/
 8 | 
 9 | ## Various settings
10 | *.pbxuser
11 | !default.pbxuser
12 | *.mode1v3
13 | !default.mode1v3
14 | *.mode2v3
15 | !default.mode2v3
16 | *.perspectivev3
17 | !default.perspectivev3
18 | xcuserdata/
19 | 
20 | ## Other
21 | *.moved-aside
22 | *.xccheckout
23 | *.xcscmblueprint
24 | 
25 | ## Obj-C/Swift specific
26 | *.hmap
27 | *.ipa
28 | *.dSYM.zip
29 | *.dSYM
30 | 
31 | # CocoaPods
32 | #
33 | # We recommend against adding the Pods directory to your .gitignore. However
34 | # you should judge for yourself, the pros and cons are mentioned at:
35 | # https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
36 | #
37 | # Pods/
38 | 
39 | # Carthage
40 | #
41 | # Add this line if you want to avoid checking in source code from Carthage dependencies.
42 | # Carthage/Checkouts
43 | 
44 | Carthage/Build
45 | 
46 | # fastlane
47 | #
48 | # It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the
49 | # screenshots whenever they are needed.
50 | # For more information about the recommended setup visit:
51 | # https://docs.fastlane.tools/best-practices/source-control/#source-control
52 | 
53 | fastlane/report.xml
54 | fastlane/Preview.html
55 | fastlane/screenshots
56 | fastlane/test_output
57 | 
58 | # Code Injection
59 | #
60 | # After new code Injection tools there's a generated folder /iOSInjectionProject
61 | # https://github.com/johnno1962/injectionforxcode
62 | 
63 | iOSInjectionProject/
64 | 


--------------------------------------------------------------------------------
/CyclePageView/SYACyclePageTransformLayout.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  SYACyclePageTransformLayout.h
 3 | //  SYACyclePageViewDemo
 4 | //
 5 | //  Created by zq on 2017/12/13.
 6 | //  Copyright © 2017年 www.lejiakeji.com. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | NS_ASSUME_NONNULL_BEGIN
12 | 
13 | typedef NS_ENUM(NSUInteger, SYACyclePageTransformLayoutType) {
14 |     SYACyclePageTransformLayoutNormal,
15 |     SYAyclePageTransformLayoutLinear,
16 |     SYACyclePageTransformLayoutCoverflow,
17 | };
18 | @class SYACyclePageTransformLayout;
19 | @protocol SYACyclePageTransformLayoutDelegate <NSObject>
20 | 
21 | - (void)pageViewTransformLayout:(SYACyclePageTransformLayout *)pageViewTransformLayout initializeTransformAttributes:(UICollectionViewLayoutAttributes *)attributes;
22 | 
23 | - (void)pageViewTransformLayout:(SYACyclePageTransformLayout *)pageViewTransformLayout applyTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes;
24 | 
25 | @end
26 | 
27 | @interface SYACyclePageViewLayout : NSObject
28 | 
29 | @property (nonatomic, assign) CGSize itemSize;
30 | 
31 | @property (nonatomic, assign) CGFloat itemSpacing;
32 | 
33 | @property (nonatomic, assign) UIEdgeInsets sectionInset;
34 | 
35 | @property (nonatomic, assign) SYACyclePageTransformLayoutType layoutType;
36 | 
37 | @property (nonatomic, assign) CGFloat minimumScale;
38 | 
39 | @property (nonatomic, assign) CGFloat minimumAlpha;
40 | 
41 | @property (nonatomic, assign) CGFloat maximumAngle;
42 | 
43 | @property (nonatomic, assign) BOOL isInfiniteLoop;
44 | 
45 | @property (nonatomic, assign) CGFloat rateOfChange;
46 | 
47 | @property (nonatomic, assign) BOOL adjustSpacingWhenScroling;
48 | 
49 | @property (nonatomic, assign) BOOL itemVerticalCenter;
50 | 
51 | @property (nonatomic, assign) BOOL itemHorizontalCenter;
52 | 
53 | // sectionInset
54 | @property (nonatomic, assign, readonly) UIEdgeInsets onlyOneSectionInset;
55 | @property (nonatomic, assign, readonly) UIEdgeInsets firstSectionInset;
56 | @property (nonatomic, assign, readonly) UIEdgeInsets lastSectionInset;
57 | @property (nonatomic, assign, readonly) UIEdgeInsets middleSectionInset;
58 | 
59 | @end
60 | 
61 | @interface SYACyclePageTransformLayout : UICollectionViewFlowLayout
62 | 
63 | @property (nonatomic, strong) SYACyclePageViewLayout *layout;
64 | 
65 | @property (nonatomic, weak) id<SYACyclePageTransformLayoutDelegate> delegate;
66 | 
67 | @end
68 | 
69 | NS_ASSUME_NONNULL_END
70 | 
71 | 


--------------------------------------------------------------------------------
/CyclePageView/SYACyclePageTransformLayout.m:
--------------------------------------------------------------------------------
  1 | //
  2 | //  SYACyclePageTransformLayout.m
  3 | //  SYACyclePageViewDemo
  4 | //
  5 | //  Created by zq on 2017/12/13.
  6 | //  Copyright © 2017年 www.lejiakeji.com. All rights reserved.
  7 | //
  8 | 
  9 | #import "SYACyclePageTransformLayout.h"
 10 | typedef NS_ENUM(NSUInteger, SYATransformLayoutItemDirection) {
 11 |     SYATransformLayoutItemLeft,
 12 |     SYATransformLayoutItemCenter,
 13 |     SYATransformLayoutItemRight,
 14 | };
 15 | @interface SYACyclePageTransformLayout(){
 16 |     struct {
 17 |         unsigned int applyTransformToAttributes   :1;
 18 |         unsigned int initializeTransformAttributes   :1;
 19 |     }_delegateFlags;
 20 | }
 21 | @property (nonatomic, assign) BOOL applyTransformToAttributesDelegate;
 22 | 
 23 | @end
 24 | 
 25 | @interface SYACyclePageViewLayout()
 26 | 
 27 | @property (nonatomic, weak) UIView *pageView;
 28 | 
 29 | @end
 30 | 
 31 | @implementation SYACyclePageTransformLayout
 32 | - (instancetype)init {
 33 |     if (self = [super init]) {
 34 |         self.scrollDirection = UICollectionViewScrollDirectionHorizontal;
 35 |     }
 36 |     return self;
 37 | }
 38 | 
 39 | - (instancetype)initWithCoder:(NSCoder *)aDecoder {
 40 |     if (self = [super initWithCoder:aDecoder]) {
 41 |         self.scrollDirection = UICollectionViewScrollDirectionHorizontal;
 42 |     }
 43 |     return self;
 44 | }
 45 | 
 46 | - (void)setDelegate:(id<SYACyclePageTransformLayoutDelegate>)delegate {
 47 |     _delegate = delegate;
 48 |     _delegateFlags.initializeTransformAttributes = [delegate respondsToSelector:@selector(pageViewTransformLayout:initializeTransformAttributes:)];
 49 |     _delegateFlags.applyTransformToAttributes = [delegate respondsToSelector:@selector(pageViewTransformLayout:applyTransformToAttributes:)];
 50 | }
 51 | 
 52 | - (void)setLayout:(SYACyclePageViewLayout *)layout {
 53 |     _layout = layout;
 54 |     _layout.pageView = self.collectionView;
 55 |     self.itemSize = _layout.itemSize;
 56 |     self.minimumInteritemSpacing = _layout.itemSpacing;
 57 |     self.minimumLineSpacing = _layout.itemSpacing;
 58 | }
 59 | 
 60 | - (CGSize)itemSize {
 61 |     if (!_layout) {
 62 |         return [super itemSize];
 63 |     }
 64 |     return _layout.itemSize;
 65 | }
 66 | 
 67 | - (CGFloat)minimumLineSpacing {
 68 |     if (!_layout) {
 69 |         return [super minimumLineSpacing];
 70 |     }
 71 |     return _layout.itemSpacing;
 72 | }
 73 | 
 74 | - (CGFloat)minimumInteritemSpacing {
 75 |     if (!_layout) {
 76 |         return [super minimumInteritemSpacing];
 77 |     }
 78 |     return _layout.itemSpacing;
 79 | }
 80 | 
 81 | - (SYATransformLayoutItemDirection)directionWithCenterX:(CGFloat)centerX {
 82 |     SYATransformLayoutItemDirection direction= SYATransformLayoutItemRight;
 83 |     CGFloat contentCenterX = self.collectionView.contentOffset.x + CGRectGetWidth(self.collectionView.frame)/2;
 84 |     if (ABS(centerX - contentCenterX) < 0.5) {
 85 |         direction = SYATransformLayoutItemCenter;
 86 |     }else if (centerX - contentCenterX < 0) {
 87 |         direction = SYATransformLayoutItemLeft;
 88 |     }
 89 |     return direction;
 90 | }
 91 | 
 92 | #pragma mark - layout
 93 | 
 94 | -(BOOL)shouldInvalidateLayoutForBoundsChange:(CGRect)newBounds
 95 | {
 96 |     return _layout.layoutType == SYACyclePageTransformLayoutNormal ? [super shouldInvalidateLayoutForBoundsChange:newBounds] : YES;
 97 | }
 98 | 
 99 | - (NSArray<UICollectionViewLayoutAttributes *> *)layoutAttributesForElementsInRect:(CGRect)rect {
100 |     if (_delegateFlags.applyTransformToAttributes || _layout.layoutType != SYACyclePageTransformLayoutNormal) {
101 |         NSArray *attributesArray = [[NSArray alloc] initWithArray:[super layoutAttributesForElementsInRect:rect] copyItems:YES];
102 |         CGRect visibleRect = {self.collectionView.contentOffset,self.collectionView.bounds.size};
103 |         for (UICollectionViewLayoutAttributes *attributes in attributesArray) {
104 |             if (!CGRectIntersectsRect(visibleRect, attributes.frame)) {
105 |                 continue;
106 |             }
107 |             if (_delegateFlags.applyTransformToAttributes) {
108 |                 [_delegate pageViewTransformLayout:self applyTransformToAttributes:attributes];
109 |             }else {
110 |                 [self applyTransformToAttributes:attributes layoutType:_layout.layoutType];
111 |             }
112 |         }
113 |         return attributesArray;
114 |     }
115 |     return [super layoutAttributesForElementsInRect:rect];
116 | }
117 | 
118 | - (UICollectionViewLayoutAttributes *)layoutAttributesForItemAtIndexPath:(NSIndexPath *)indexPath {
119 |     UICollectionViewLayoutAttributes *attributes = [super layoutAttributesForItemAtIndexPath:indexPath];
120 |     if (_delegateFlags.initializeTransformAttributes) {
121 |         [_delegate pageViewTransformLayout:self initializeTransformAttributes:attributes];
122 |     }else if(_layout.layoutType != SYACyclePageTransformLayoutNormal){
123 |         [self initializeTransformAttributes:attributes layoutType:_layout.layoutType];
124 |     }
125 |     return attributes;
126 | }
127 | 
128 | #pragma mark - transform
129 | 
130 | - (void)initializeTransformAttributes:(UICollectionViewLayoutAttributes *)attributes layoutType:(SYACyclePageTransformLayoutType)layoutType {
131 |     switch (layoutType) {
132 |         case SYAyclePageTransformLayoutLinear:
133 |             [self applyLinearTransformToAttributes:attributes scale:_layout.minimumScale alpha:_layout.minimumAlpha];
134 |             break;
135 |         case SYACyclePageTransformLayoutCoverflow:
136 |         {
137 |             [self applyCoverflowTransformToAttributes:attributes angle:_layout.maximumAngle alpha:_layout.minimumAlpha];
138 |             break;
139 |         }
140 |         default:
141 |             break;
142 |     }
143 | }
144 | 
145 | - (void)applyTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes layoutType:(SYACyclePageTransformLayoutType)layoutType {
146 |     switch (layoutType) {
147 |         case SYAyclePageTransformLayoutLinear:
148 |             [self applyLinearTransformToAttributes:attributes];
149 |             break;
150 |         case SYACyclePageTransformLayoutCoverflow:
151 |             [self applyCoverflowTransformToAttributes:attributes];
152 |             break;
153 |         default:
154 |             break;
155 |     }
156 | }
157 | 
158 | #pragma mark - LinearTransform
159 | 
160 | - (void)applyLinearTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes {
161 |     CGFloat collectionViewWidth = self.collectionView.frame.size.width;
162 |     if (collectionViewWidth <= 0) {
163 |         return;
164 |     }
165 |     CGFloat centetX = self.collectionView.contentOffset.x + collectionViewWidth/2;
166 |     CGFloat delta = ABS(attributes.center.x - centetX);
167 |     CGFloat scale = MAX(1 - delta/collectionViewWidth*_layout.rateOfChange, _layout.minimumScale);
168 |     CGFloat alpha = MAX(1 - delta/collectionViewWidth, _layout.minimumAlpha);
169 |     [self applyLinearTransformToAttributes:attributes scale:scale alpha:alpha];
170 | }
171 | 
172 | - (void)applyLinearTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes scale:(CGFloat)scale alpha:(CGFloat)alpha {
173 |     CGAffineTransform transform = CGAffineTransformMakeScale(scale, scale);
174 |     if (_layout.adjustSpacingWhenScroling) {
175 |         SYATransformLayoutItemDirection direction = [self directionWithCenterX:attributes.center.x];
176 |         CGFloat translate = 0;
177 |         switch (direction) {
178 |             case SYATransformLayoutItemLeft:
179 |                 translate = 1.15 * attributes.size.width*(1-scale)/2;
180 |                 break;
181 |             case SYATransformLayoutItemRight:
182 |                 translate = -1.15 * attributes.size.width*(1-scale)/2;
183 |                 break;
184 |             default:
185 |                 // center
186 |                 scale = 1.0;
187 |                 alpha = 1.0;
188 |                 break;
189 |         }
190 |         transform = CGAffineTransformTranslate(transform,translate, 0);
191 |     }
192 |     attributes.transform = transform;
193 |     attributes.alpha = alpha;
194 | }
195 | 
196 | #pragma mark - CoverflowTransform
197 | 
198 | - (void)applyCoverflowTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes{
199 |     CGFloat collectionViewWidth = self.collectionView.frame.size.width;
200 |     if (collectionViewWidth <= 0) {
201 |         return;
202 |     }
203 |     CGFloat centetX = self.collectionView.contentOffset.x + collectionViewWidth/2;
204 |     CGFloat delta = ABS(attributes.center.x - centetX);
205 |     CGFloat angle = MIN(delta/collectionViewWidth*(1-_layout.rateOfChange), _layout.maximumAngle);
206 |     CGFloat alpha = MAX(1 - delta/collectionViewWidth, _layout.minimumAlpha);
207 |     [self applyCoverflowTransformToAttributes:attributes angle:angle alpha:alpha];
208 | }
209 | 
210 | - (void)applyCoverflowTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes angle:(CGFloat)angle alpha:(CGFloat)alpha {
211 |     SYATransformLayoutItemDirection direction = [self directionWithCenterX:attributes.center.x];
212 |     CATransform3D transform3D = CATransform3DIdentity;
213 |     transform3D.m34 = -0.002;
214 |     CGFloat translate = 0;
215 |     switch (direction) {
216 |         case SYATransformLayoutItemLeft:
217 |             translate = (1-cos(angle*1.2*M_PI))*attributes.size.width;
218 |             break;
219 |         case SYATransformLayoutItemRight:
220 |             translate = -(1-cos(angle*1.2*M_PI))*attributes.size.width;
221 |             angle = -angle;
222 |             break;
223 |         default:
224 |             // center
225 |             angle = 0;
226 |             alpha = 1;
227 |             break;
228 |     }
229 |     
230 |     transform3D = CATransform3DRotate(transform3D, M_PI*angle, 0, 1, 0);
231 |     if (_layout.adjustSpacingWhenScroling) {
232 |         transform3D = CATransform3DTranslate(transform3D, translate, 0, 0);
233 |     }
234 |     attributes.transform3D = transform3D;
235 |     attributes.alpha = alpha;
236 |     
237 | }
238 | @end
239 | 
240 | 
241 | @implementation SYACyclePageViewLayout
242 | 
243 | - (instancetype)init {
244 |     if (self = [super init]) {
245 |         _itemVerticalCenter = YES;
246 |         _minimumScale = 0.8;
247 |         _minimumAlpha = 1.0;
248 |         _maximumAngle = 0.2;
249 |         _rateOfChange = 0.4;
250 |         _adjustSpacingWhenScroling = YES;
251 |     }
252 |     return self;
253 | }
254 | 
255 | #pragma mark - getter
256 | 
257 | - (UIEdgeInsets)onlyOneSectionInset {
258 |     CGFloat leftSpace = _pageView && !_isInfiniteLoop && _itemHorizontalCenter ? (CGRectGetWidth(_pageView.frame) - _itemSize.width)/2 : _sectionInset.left;
259 |     CGFloat rightSpace = _pageView && !_isInfiniteLoop && _itemHorizontalCenter ? (CGRectGetWidth(_pageView.frame) - _itemSize.width)/2 : _sectionInset.right;
260 |     if (_itemVerticalCenter) {
261 |         CGFloat verticalSpace = (CGRectGetHeight(_pageView.frame) - _itemSize.height)/2;
262 |         return UIEdgeInsetsMake(verticalSpace, leftSpace, verticalSpace, rightSpace);
263 |     }
264 |     return UIEdgeInsetsMake(_sectionInset.top, leftSpace, _sectionInset.bottom, rightSpace);
265 | }
266 | 
267 | - (UIEdgeInsets)firstSectionInset {
268 |     if (_itemVerticalCenter) {
269 |         CGFloat verticalSpace = (CGRectGetHeight(_pageView.frame) - _itemSize.height)/2;
270 |         return UIEdgeInsetsMake(verticalSpace, _sectionInset.left, verticalSpace, _itemSpacing);
271 |     }
272 |     return UIEdgeInsetsMake(_sectionInset.top, _sectionInset.left, _sectionInset.bottom, _itemSpacing);
273 | }
274 | 
275 | - (UIEdgeInsets)lastSectionInset {
276 |     if (_itemVerticalCenter) {
277 |         CGFloat verticalSpace = (CGRectGetHeight(_pageView.frame) - _itemSize.height)/2;
278 |         return UIEdgeInsetsMake(verticalSpace, 0, verticalSpace, _sectionInset.right);
279 |     }
280 |     return UIEdgeInsetsMake(_sectionInset.top, 0, _sectionInset.bottom, _sectionInset.right);
281 | }
282 | 
283 | - (UIEdgeInsets)middleSectionInset {
284 |     if (_itemVerticalCenter) {
285 |         CGFloat verticalSpace = (CGRectGetHeight(_pageView.frame) - _itemSize.height)/2;
286 |         return UIEdgeInsetsMake(verticalSpace, 0, verticalSpace, _itemSpacing);
287 |     }
288 |     return _sectionInset;
289 | }
290 | @end
291 | 


--------------------------------------------------------------------------------
/CyclePageView/SYACyclePageView.h:
--------------------------------------------------------------------------------
  1 | //
  2 | //  SYACyclePageView.h
  3 | //  SYACyclePageViewDemo
  4 | //
  5 | //  Created by zq on 2017/12/13.
  6 | //  Copyright © 2017年 www.lejiakeji.com. All rights reserved.
  7 | //
  8 | 
  9 | #import <UIKit/UIKit.h>
 10 | #import "SYACyclePageTransformLayout.h"
 11 | NS_ASSUME_NONNULL_BEGIN
 12 | typedef NS_ENUM(NSUInteger, SYAPageScrollDirection) {
 13 |     SYAPageScrollDirectionLeft,
 14 |     SYAPageScrollDirectionRight,
 15 | };
 16 | @class SYACyclePageView;
 17 | @protocol SYACyclePagerViewDataSource <NSObject>
 18 | 
 19 | - (NSInteger)numberOfItemsInPagerView:(SYACyclePageView *)pageView;
 20 | 
 21 | - (__kindof UICollectionViewCell *)pagerView:(SYACyclePageView *)pagerView cellForItemAtIndex:(NSInteger)index;
 22 | 
 23 | - (SYACyclePageViewLayout *)layoutForPagerView:(SYACyclePageView *)pageView;
 24 | 
 25 | @end
 26 | 
 27 | @protocol SYACyclePageViewDelegate <NSObject>
 28 | 
 29 | @optional
 30 | 
 31 | - (void)pagerView:(SYACyclePageView *)pageView didScrollFromIndex:(NSInteger)fromIndex toIndex:(NSInteger)toIndex;
 32 | 
 33 | - (void)pagerView:(SYACyclePageView *)pageView didSelectedItemCell:(__kindof UICollectionViewCell *)cell atIndex:(NSInteger)index;
 34 | 
 35 | - (void)pagerView:(SYACyclePageView *)pageView initializeTransformAttributes:(UICollectionViewLayoutAttributes *)attributes;
 36 | 
 37 | - (void)pagerView:(SYACyclePageView *)pageView applyTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes;
 38 | 
 39 | 
 40 | // scrollViewDelegate
 41 | 
 42 | - (void)pagerViewDidScroll:(SYACyclePageView *)pageView;
 43 | 
 44 | - (void)pagerViewWillBeginDragging:(SYACyclePageView *)pageView;
 45 | 
 46 | - (void)pagerViewDidEndDragging:(SYACyclePageView *)pageView willDecelerate:(BOOL)decelerate;
 47 | 
 48 | - (void)pagerViewWillBeginDecelerating:(SYACyclePageView *)pageView;
 49 | 
 50 | - (void)pagerViewDidEndDecelerating:(SYACyclePageView *)pageView;
 51 | 
 52 | - (void)pagerViewWillBeginScrollingAnimation:(SYACyclePageView *)pageView;
 53 | 
 54 | - (void)pagerViewDidEndScrollingAnimation:(SYACyclePageView *)pageView;
 55 | 
 56 | @end
 57 | @interface SYACyclePageView : UIView
 58 | 
 59 | @property (nonatomic, strong, nullable) UIView *backgroundView;
 60 | 
 61 | @property (nonatomic, weak, nullable) id<SYACyclePagerViewDataSource> dataSource;
 62 | 
 63 | @property (nonatomic, weak, nullable) id<SYACyclePageViewDelegate> delegate;
 64 | 
 65 | @property (nonatomic, weak, readonly) UICollectionView *collectionView;
 66 | 
 67 | @property (nonatomic, strong, readonly) SYACyclePageViewLayout *layout;
 68 | 
 69 | @property (nonatomic, assign) BOOL isInfiniteLoop;
 70 | 
 71 | @property (nonatomic, assign) CGFloat autoScrollInterval;
 72 | 
 73 | @property (nonatomic, assign, readonly) NSInteger curIndex;
 74 | 
 75 | @property (nonatomic, assign, readonly) CGPoint contentOffset;
 76 | 
 77 | @property (nonatomic, assign, readonly) BOOL tracking;
 78 | 
 79 | @property (nonatomic, assign, readonly) BOOL dragging;
 80 | 
 81 | @property (nonatomic, assign, readonly) BOOL decelerating;
 82 | 
 83 | - (void)reloadData;
 84 | 
 85 | - (void)updateData;
 86 | 
 87 | - (void)setNeedUpdateLayout;
 88 | 
 89 | - (void)setNeedClearLayout;
 90 | 
 91 | - (__kindof UICollectionViewCell * _Nullable)curIndexCell;
 92 | 
 93 | - (NSArray<__kindof UICollectionViewCell *> *_Nullable)visibleCells;
 94 | 
 95 | - (NSArray *)visibleIndexs;
 96 | 
 97 | - (void)scrollToItemAtIndex:(NSInteger)index animate:(BOOL)animate;
 98 | 
 99 | - (void)scrollToNearlyIndexAtDirection:(SYAPageScrollDirection)direction animate:(BOOL)animate;
100 | 
101 | - (void)registerClass:(Class)Class forCellWithReuseIdentifier:(NSString *)identifier;
102 | 
103 | - (void)registerNib:(UINib *)nib forCellWithReuseIdentifier:(NSString *)identifier;
104 | 
105 | - (__kindof UICollectionViewCell *)dequeueReusableCellWithReuseIdentifier:(NSString *)identifier forIndex:(NSInteger)index;
106 | @end
107 | NS_ASSUME_NONNULL_END
108 | 


--------------------------------------------------------------------------------
/CyclePageView/SYACyclePageView.m:
--------------------------------------------------------------------------------
  1 | //
  2 | //  SYACyclePageView.m
  3 | //  SYACyclePageViewDemo
  4 | //
  5 | //  Created by zq on 2017/12/13.
  6 | //  Copyright © 2017年 www.lejiakeji.com. All rights reserved.
  7 | //
  8 | 
  9 | #import "SYACyclePageView.h"
 10 | typedef struct {
 11 |     NSInteger index;
 12 |     NSInteger section;
 13 | }SYAIndexSection;
 14 | 
 15 | NS_INLINE BOOL SYAEqualIndexSection(SYAIndexSection indexSection1,SYAIndexSection indexSection2) {
 16 |     return indexSection1.index == indexSection2.index && indexSection1.section == indexSection2.section;
 17 | }
 18 | 
 19 | NS_INLINE SYAIndexSection SYAMakeIndexSection(NSInteger index, NSInteger section) {
 20 |     SYAIndexSection indexSection;
 21 |     indexSection.index = index;
 22 |     indexSection.section = section;
 23 |     return indexSection;
 24 | }
 25 | 
 26 | @interface SYACyclePageView () <UICollectionViewDataSource, UICollectionViewDelegateFlowLayout, SYACyclePageTransformLayoutDelegate> {
 27 |     struct {
 28 |         unsigned int pagerViewDidScroll   :1;
 29 |         unsigned int didScrollFromIndexToNewIndex   :1;
 30 |         unsigned int initializeTransformAttributes   :1;
 31 |         unsigned int applyTransformToAttributes   :1;
 32 |     }_delegateFlags;
 33 |     struct {
 34 |         unsigned int cellForItemAtIndex   :1;
 35 |         unsigned int layoutForPagerView   :1;
 36 |     }_dataSourceFlags;
 37 | }
 38 | 
 39 | @property (nonatomic, weak) UICollectionView *collectionView;
 40 | @property (nonatomic, strong) SYACyclePageViewLayout *layout;
 41 | @property (nonatomic, strong) NSTimer *timer;
 42 | 
 43 | @property (nonatomic, assign) NSInteger numberOfItems;
 44 | 
 45 | @property (nonatomic, assign) SYAIndexSection indexSection; // current index
 46 | @property (nonatomic, assign) NSInteger dequeueSection;
 47 | @property (nonatomic, assign) SYAIndexSection beginDragIndexSection;
 48 | 
 49 | @property (nonatomic, assign) BOOL needClearLayout;
 50 | @property (nonatomic, assign) BOOL didReloadData;
 51 | @property (nonatomic, assign) BOOL didLayout;
 52 | @end
 53 | #define kPageViewMaxSectionCount 200
 54 | #define kPageViewMinSectionCount 18
 55 | @implementation SYACyclePageView
 56 | 
 57 | - (instancetype)initWithFrame:(CGRect)frame {
 58 |     if (self = [super initWithFrame:frame]) {
 59 |         [self configureProperty];
 60 |         
 61 |         [self addCollectionView];
 62 |     }
 63 |     return self;
 64 | }
 65 | 
 66 | - (instancetype)initWithCoder:(NSCoder *)aDecoder {
 67 |     if (self = [super initWithCoder:aDecoder]) {
 68 |         [self configureProperty];
 69 |         
 70 |         [self addCollectionView];
 71 |     }
 72 |     return self;
 73 | }
 74 | 
 75 | - (void)configureProperty {
 76 |     _didReloadData = NO;
 77 |     _didLayout = NO;
 78 |     _autoScrollInterval = 0;
 79 |     _isInfiniteLoop = YES;
 80 |     _beginDragIndexSection.index = 0;
 81 |     _beginDragIndexSection.section = 0;
 82 |     _indexSection.index = -1;
 83 |     _indexSection.section = -1;
 84 | }
 85 | 
 86 | - (void)addCollectionView {
 87 |     SYACyclePageTransformLayout *layout = [[SYACyclePageTransformLayout alloc]init];
 88 |     UICollectionView *collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:layout];
 89 |     layout.delegate = _delegateFlags.applyTransformToAttributes ? self : nil;;
 90 |     collectionView.backgroundColor = [UIColor clearColor];
 91 |     collectionView.dataSource = self;
 92 |     collectionView.delegate = self;
 93 |     collectionView.pagingEnabled = NO;
 94 |     collectionView.decelerationRate = 1-0.0076;
 95 |     if ([collectionView respondsToSelector:@selector(setPrefetchingEnabled:)]) {
 96 |         collectionView.prefetchingEnabled = NO;
 97 |     }
 98 |     collectionView.showsHorizontalScrollIndicator = NO;
 99 |     collectionView.showsVerticalScrollIndicator = NO;
100 |     [self addSubview:collectionView];
101 |     _collectionView = collectionView;
102 | }
103 | 
104 | - (void)willMoveToSuperview:(UIView *)newSuperview {
105 |     if (!newSuperview) {
106 |         [self removeTimer];
107 |     }else {
108 |         [self removeTimer];
109 |         if (_autoScrollInterval > 0) {
110 |             [self addTimer];
111 |         }
112 |     }
113 | }
114 | 
115 | #pragma mark - timer
116 | 
117 | - (void)addTimer {
118 |     if (_timer) {
119 |         return;
120 |     }
121 |     _timer = [NSTimer timerWithTimeInterval:_autoScrollInterval target:self selector:@selector(timerFired:) userInfo:nil repeats:YES];
122 |     [[NSRunLoop mainRunLoop] addTimer:_timer forMode:NSRunLoopCommonModes];
123 | }
124 | 
125 | - (void)removeTimer {
126 |     if (!_timer) {
127 |         return;
128 |     }
129 |     [_timer invalidate];
130 |     _timer = nil;
131 | }
132 | 
133 | - (void)timerFired:(NSTimer *)timer {
134 |     if (!self.superview || !self.window || _numberOfItems == 0 || self.tracking) {
135 |         return;
136 |     }
137 |     
138 |     [self scrollToNearlyIndexAtDirection:SYAPageScrollDirectionRight animate:YES];
139 | }
140 | 
141 | #pragma mark - getter
142 | 
143 | - (SYACyclePageViewLayout *)layout {
144 |     if (!_layout) {
145 |         if (_dataSourceFlags.layoutForPagerView) {
146 |             _layout = [_dataSource layoutForPagerView:self];
147 |             _layout.isInfiniteLoop = _isInfiniteLoop;
148 |         }
149 |         if (_layout.itemSize.width <= 0 || _layout.itemSize.height <= 0) {
150 |             _layout = nil;
151 |         }
152 |     }
153 |     return _layout;
154 | }
155 | 
156 | - (NSInteger)curIndex {
157 |     return _indexSection.index;
158 | }
159 | 
160 | - (CGPoint)contentOffset {
161 |     return _collectionView.contentOffset;
162 | }
163 | 
164 | - (BOOL)tracking {
165 |     return _collectionView.tracking;
166 | }
167 | 
168 | - (BOOL)dragging {
169 |     return _collectionView.dragging;
170 | }
171 | 
172 | - (BOOL)decelerating {
173 |     return _collectionView.decelerating;
174 | }
175 | 
176 | - (UIView *)backgroundView {
177 |     return _collectionView.backgroundView;
178 | }
179 | 
180 | - (__kindof UICollectionViewCell *)curIndexCell {
181 |     return [_collectionView cellForItemAtIndexPath:[NSIndexPath indexPathForItem:_indexSection.index inSection:_indexSection.section]];
182 | }
183 | 
184 | - (NSArray<__kindof UICollectionViewCell *> *)visibleCells {
185 |     return _collectionView.visibleCells;
186 | }
187 | 
188 | - (NSArray *)visibleIndexs {
189 |     NSMutableArray *indexs = [NSMutableArray array];
190 |     for (NSIndexPath *indexPath in _collectionView.indexPathsForVisibleItems) {
191 |         [indexs addObject:@(indexPath.item)];
192 |     }
193 |     return [indexs copy];
194 | }
195 | 
196 | #pragma mark - setter
197 | 
198 | - (void)setBackgroundView:(UIView *)backgroundView {
199 |     [_collectionView setBackgroundView:backgroundView];
200 | }
201 | 
202 | - (void)setAutoScrollInterval:(CGFloat)autoScrollInterval {
203 |     _autoScrollInterval = autoScrollInterval;
204 |     [self removeTimer];
205 |     if (autoScrollInterval > 0 && self.superview) {
206 |         [self addTimer];
207 |     }
208 | }
209 | 
210 | - (void)setDelegate:(id<SYACyclePageViewDelegate>)delegate {
211 |     _delegate = delegate;
212 |     _delegateFlags.pagerViewDidScroll = [delegate respondsToSelector:@selector(pagerViewDidScroll:)];
213 |     _delegateFlags.didScrollFromIndexToNewIndex = [delegate respondsToSelector:@selector(pagerView:didScrollFromIndex:toIndex:)];
214 |     _delegateFlags.initializeTransformAttributes = [delegate respondsToSelector:@selector(pagerView:initializeTransformAttributes:)];
215 |     _delegateFlags.applyTransformToAttributes = [delegate respondsToSelector:@selector(pagerView:applyTransformToAttributes:)];
216 |     if (self.collectionView && self.collectionView.collectionViewLayout) {
217 |         ((SYACyclePageTransformLayout *)self.collectionView.collectionViewLayout).delegate = _delegateFlags.applyTransformToAttributes ? self : nil;
218 |     }
219 | }
220 | 
221 | - (void)setDataSource:(id<SYACyclePagerViewDataSource>)dataSource {
222 |     _dataSource = dataSource;
223 |     _dataSourceFlags.cellForItemAtIndex = [dataSource respondsToSelector:@selector(pagerView:cellForItemAtIndex:)];
224 |     _dataSourceFlags.layoutForPagerView = [dataSource respondsToSelector:@selector(layoutForPagerView:)];
225 | }
226 | 
227 | #pragma mark - public
228 | 
229 | - (void)reloadData {
230 |     _didReloadData = YES;
231 |     [self setNeedClearLayout];
232 |     [self clearLayout];
233 |     [self updateData];
234 | }
235 | 
236 | // not clear layout
237 | - (void)updateData {
238 |     [self updateLayout];
239 |     _numberOfItems = [_dataSource numberOfItemsInPagerView:self];
240 |     [_collectionView reloadData];
241 |     if (!_didLayout && !CGRectIsEmpty(self.frame) && _indexSection.index < 0) {
242 |         _didLayout = YES;
243 |     }
244 |     [self resetPagerViewAtIndex:_indexSection.index < 0 && !CGRectIsEmpty(self.frame) ? 0 :_indexSection.index];
245 | }
246 | 
247 | - (void)scrollToNearlyIndexAtDirection:(SYAPageScrollDirection)direction animate:(BOOL)animate {
248 |     SYAIndexSection indexSection = [self nearlyIndexPathAtDirection:direction];
249 |     [self scrollToItemAtIndexSection:indexSection animate:animate];
250 | }
251 | 
252 | - (void)scrollToItemAtIndex:(NSInteger)index animate:(BOOL)animate {
253 |     if (!_isInfiniteLoop) {
254 |         [self scrollToItemAtIndexSection:SYAMakeIndexSection(index, 0) animate:animate];
255 |         return;
256 |     }
257 |     
258 |     [self scrollToItemAtIndexSection:SYAMakeIndexSection(index, index >= self.curIndex ? _indexSection.section : _indexSection.section+1) animate:YES];
259 | }
260 | 
261 | - (void)scrollToItemAtIndexSection:(SYAIndexSection)indexSection animate:(BOOL)animate {
262 |     if (_numberOfItems <= 0 || ![self isValidIndexSection:indexSection]) {
263 |         return;
264 |     }
265 |     
266 |     if (animate && [_delegate respondsToSelector:@selector(pagerViewWillBeginScrollingAnimation:)]) {
267 |         [_delegate pagerViewWillBeginScrollingAnimation:self];
268 |     }
269 |     CGFloat offset = [self caculateOffsetXAtIndexSection:indexSection];
270 |     [_collectionView setContentOffset:CGPointMake(offset, _collectionView.contentOffset.y) animated:animate];
271 | }
272 | 
273 | - (void)registerClass:(Class)Class forCellWithReuseIdentifier:(NSString *)identifier {
274 |     [_collectionView registerClass:Class forCellWithReuseIdentifier:identifier];
275 | }
276 | 
277 | - (void)registerNib:(UINib *)nib forCellWithReuseIdentifier:(NSString *)identifier {
278 |     [_collectionView registerNib:nib forCellWithReuseIdentifier:identifier];
279 | }
280 | 
281 | - (__kindof UICollectionViewCell *)dequeueReusableCellWithReuseIdentifier:(NSString *)identifier forIndex:(NSInteger)index {
282 |     UICollectionViewCell *cell = [_collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:[NSIndexPath indexPathForItem:index inSection:_dequeueSection]];
283 |     return cell;
284 | }
285 | 
286 | #pragma mark - configure layout
287 | 
288 | - (void)updateLayout {
289 |     if (!self.layout) {
290 |         return;
291 |     }
292 |     self.layout.isInfiniteLoop = _isInfiniteLoop;
293 |     ((SYACyclePageTransformLayout *)_collectionView.collectionViewLayout).layout = self.layout;
294 | }
295 | 
296 | - (void)clearLayout {
297 |     if (_needClearLayout) {
298 |         _layout = nil;
299 |         _needClearLayout = NO;
300 |     }
301 | }
302 | 
303 | - (void)setNeedClearLayout {
304 |     _needClearLayout = YES;
305 | }
306 | 
307 | - (void)setNeedUpdateLayout {
308 |     if (!self.layout) {
309 |         return;
310 |     }
311 |     [self clearLayout];
312 |     [self updateLayout];
313 |     [_collectionView.collectionViewLayout invalidateLayout];
314 |     [self resetPagerViewAtIndex:_indexSection.index < 0 ? 0 :_indexSection.index];
315 | }
316 | 
317 | #pragma mark - pager index
318 | 
319 | - (BOOL)isValidIndexSection:(SYAIndexSection)indexSection {
320 |     return indexSection.index >= 0 && indexSection.index < _numberOfItems && indexSection.section >= 0 && indexSection.section < kPageViewMaxSectionCount;
321 | }
322 | 
323 | - (SYAIndexSection)nearlyIndexPathAtDirection:(SYAPageScrollDirection)direction{
324 |     return [self nearlyIndexPathForIndexSection:_indexSection direction:direction];
325 | }
326 | 
327 | - (SYAIndexSection)nearlyIndexPathForIndexSection:(SYAIndexSection)indexSection direction:(SYAPageScrollDirection)direction {
328 |     if (indexSection.index < 0 || indexSection.index >= _numberOfItems) {
329 |         return indexSection;
330 |     }
331 |     
332 |     if (!_isInfiniteLoop) {
333 |         if (direction == SYAPageScrollDirectionRight && indexSection.index == _numberOfItems - 1) {
334 |             return _autoScrollInterval > 0 ? SYAMakeIndexSection(0, 0) : indexSection;
335 |         } else if (direction == SYAPageScrollDirectionRight) {
336 |             return SYAMakeIndexSection(indexSection.index+1, 0);
337 |         }
338 |         
339 |         if (indexSection.index == 0) {
340 |             return _autoScrollInterval > 0 ? SYAMakeIndexSection(_numberOfItems - 1, 0) : indexSection;
341 |         }
342 |         return SYAMakeIndexSection(indexSection.index-1, 0);
343 |     }
344 |     
345 |     if (direction == SYAPageScrollDirectionRight) {
346 |         if (indexSection.index < _numberOfItems-1) {
347 |             return SYAMakeIndexSection(indexSection.index+1, indexSection.section);
348 |         }
349 |         if (indexSection.section >= kPageViewMaxSectionCount-1) {
350 |             return SYAMakeIndexSection(indexSection.index, kPageViewMaxSectionCount-1);
351 |         }
352 |         return SYAMakeIndexSection(0, indexSection.section+1);
353 |     }
354 |     
355 |     if (indexSection.index > 0) {
356 |         return SYAMakeIndexSection(indexSection.index-1, indexSection.section);
357 |     }
358 |     if (indexSection.section <= 0) {
359 |         return SYAMakeIndexSection(indexSection.index, 0);
360 |     }
361 |     return SYAMakeIndexSection(_numberOfItems-1, indexSection.section-1);
362 | }
363 | 
364 | - (SYAIndexSection)caculateIndexSectionWithOffsetX:(CGFloat)offsetX {
365 |     if (_numberOfItems <= 0) {
366 |         return SYAMakeIndexSection(0, 0);
367 |     }
368 |     UICollectionViewFlowLayout *layout = (UICollectionViewFlowLayout *)_collectionView.collectionViewLayout;
369 |     CGFloat leftEdge = _isInfiniteLoop ? _layout.sectionInset.left : _layout.onlyOneSectionInset.left;
370 |     CGFloat width = CGRectGetWidth(_collectionView.frame);
371 |     CGFloat middleOffset = offsetX + width/2;
372 |     CGFloat itemWidth = layout.itemSize.width + layout.minimumInteritemSpacing;
373 |     NSInteger curIndex = 0;
374 |     NSInteger curSection = 0;
375 |     if (middleOffset - leftEdge >= 0) {
376 |         NSInteger itemIndex = (middleOffset - leftEdge+layout.minimumInteritemSpacing/2)/itemWidth;
377 |         if (itemIndex < 0) {
378 |             itemIndex = 0;
379 |         }else if (itemIndex >= _numberOfItems*kPageViewMaxSectionCount) {
380 |             itemIndex = _numberOfItems*kPageViewMaxSectionCount-1;
381 |         }
382 |         curIndex = itemIndex%_numberOfItems;
383 |         curSection = itemIndex/_numberOfItems;
384 |     }
385 |     return SYAMakeIndexSection(curIndex, curSection);
386 | }
387 | 
388 | - (CGFloat)caculateOffsetXAtIndexSection:(SYAIndexSection)indexSection{
389 |     if (_numberOfItems == 0) {
390 |         return 0;
391 |     }
392 |     UICollectionViewFlowLayout *layout = (UICollectionViewFlowLayout *)_collectionView.collectionViewLayout;
393 |     CGFloat leftEdge = _isInfiniteLoop ? _layout.sectionInset.left : _layout.onlyOneSectionInset.left;
394 |     CGFloat width = CGRectGetWidth(_collectionView.frame);
395 |     CGFloat itemWidth = layout.itemSize.width + layout.minimumInteritemSpacing;
396 |     CGFloat offsetX = leftEdge + itemWidth*(indexSection.index + indexSection.section*_numberOfItems) - layout.minimumInteritemSpacing/2 - (width - itemWidth)/2;
397 |     return MAX(offsetX, 0);
398 | }
399 | 
400 | - (void)resetPagerViewAtIndex:(NSInteger)index {
401 |     if (index < 0) {
402 |         return;
403 |     }
404 |     if (index >= _numberOfItems) {
405 |         index = 0;
406 |     }
407 |     [self scrollToItemAtIndexSection:SYAMakeIndexSection(index, _isInfiniteLoop ? kPageViewMaxSectionCount/3 : 0) animate:NO];
408 |     if (!_isInfiniteLoop && _indexSection.index < 0) {
409 |         [self scrollViewDidScroll:_collectionView];
410 |     }
411 | }
412 | 
413 | - (void)recyclePagerViewIfNeed {
414 |     if (!_isInfiniteLoop) {
415 |         return;
416 |     }
417 |     if (_indexSection.section > kPageViewMaxSectionCount - kPageViewMinSectionCount || _indexSection.section < kPageViewMinSectionCount) {
418 |         [self resetPagerViewAtIndex:_indexSection.index];
419 |     }
420 | }
421 | 
422 | #pragma mark - UICollectionViewDataSource
423 | 
424 | - (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
425 |     return _isInfiniteLoop ? kPageViewMaxSectionCount : 1;
426 | }
427 | 
428 | - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
429 |     _numberOfItems = [_dataSource numberOfItemsInPagerView:self];
430 |     return _numberOfItems;
431 | }
432 | 
433 | - (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
434 |     _dequeueSection = indexPath.section;
435 |     if (_dataSourceFlags.cellForItemAtIndex) {
436 |         return [_dataSource pagerView:self cellForItemAtIndex:indexPath.row];
437 |     }
438 |     NSAssert(NO, @"pagerView cellForItemAtIndex: is nil!");
439 |     return nil;
440 | }
441 | 
442 | #pragma mark - UICollectionViewDelegateFlowLayout
443 | 
444 | - (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
445 |     if (!_isInfiniteLoop) {
446 |         return _layout.onlyOneSectionInset;
447 |     }
448 |     if (section == 0 ) {
449 |         return _layout.firstSectionInset;
450 |     }else if (section == kPageViewMaxSectionCount -1) {
451 |         return _layout.lastSectionInset;
452 |     }
453 |     return _layout.middleSectionInset;
454 | }
455 | 
456 | - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
457 |     UICollectionViewCell *cell = [collectionView cellForItemAtIndexPath:indexPath];
458 |     if ([_delegate respondsToSelector:@selector(pagerView:didSelectedItemCell:atIndex:)]) {
459 |         [_delegate pagerView:self didSelectedItemCell:cell atIndex:indexPath.item];
460 |     }
461 | }
462 | 
463 | #pragma mark - UIScrollViewDelegate
464 | 
465 | - (void)scrollViewDidScroll:(UIScrollView *)scrollView {
466 |     if (!_didLayout) {
467 |         return;
468 |     }
469 |     SYAIndexSection newIndexSection =  [self caculateIndexSectionWithOffsetX:scrollView.contentOffset.x];
470 |     if (_numberOfItems <= 0 || ![self isValidIndexSection:newIndexSection]) {
471 |         NSLog(@"inVlaidIndexSection:(%ld,%ld)!",(long)newIndexSection.index,(long)newIndexSection.section);
472 |         return;
473 |     }
474 |     SYAIndexSection indexSection = _indexSection;
475 |     _indexSection = newIndexSection;
476 |     
477 |     if (_delegateFlags.pagerViewDidScroll) {
478 |         [_delegate pagerViewDidScroll:self];
479 |     }
480 |     
481 |     if (_delegateFlags.didScrollFromIndexToNewIndex && !SYAEqualIndexSection(_indexSection, indexSection)) {
482 |         [_delegate pagerView:self didScrollFromIndex:MAX(indexSection.index, 0) toIndex:_indexSection.index];
483 |     }
484 | }
485 | 
486 | - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
487 |     if (_autoScrollInterval > 0) {
488 |         [self removeTimer];
489 |     }
490 |     _beginDragIndexSection = [self caculateIndexSectionWithOffsetX:scrollView.contentOffset.x];
491 |     if ([_delegate respondsToSelector:@selector(pagerViewWillBeginDragging:)]) {
492 |         [_delegate pagerViewWillBeginDragging:self];
493 |     }
494 | }
495 | 
496 | - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset {
497 |     if (fabs(velocity.x) < 0.35 || !SYAEqualIndexSection(_beginDragIndexSection, _indexSection)) {
498 |         targetContentOffset->x = [self caculateOffsetXAtIndexSection:_indexSection];
499 |         return;
500 |     }
501 |     SYAPageScrollDirection direction = SYAPageScrollDirectionRight;
502 |     if ((scrollView.contentOffset.x < 0 && targetContentOffset->x <= 0) || (targetContentOffset->x < scrollView.contentOffset.x && scrollView.contentOffset.x < scrollView.contentSize.width - scrollView.frame.size.width)) {
503 |         direction = SYAPageScrollDirectionLeft;
504 |     }
505 |     SYAIndexSection indexSection = [self nearlyIndexPathForIndexSection:_indexSection direction:direction];
506 |     targetContentOffset->x = [self caculateOffsetXAtIndexSection:indexSection];
507 | }
508 | 
509 | - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {
510 |     if (_autoScrollInterval > 0) {
511 |         [self addTimer];
512 |     }
513 |     if ([_delegate respondsToSelector:@selector(pagerViewDidEndDragging:willDecelerate:)]) {
514 |         [_delegate pagerViewDidEndDragging:self willDecelerate:decelerate];
515 |     }
516 | }
517 | 
518 | - (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView {
519 |     if ([_delegate respondsToSelector:@selector(pagerViewWillBeginDecelerating:)]) {
520 |         [_delegate pagerViewWillBeginDecelerating:self];
521 |     }
522 | }
523 | 
524 | - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
525 |     [self recyclePagerViewIfNeed];
526 |     if ([_delegate respondsToSelector:@selector(pagerViewDidEndDecelerating:)]) {
527 |         [_delegate pagerViewDidEndDecelerating:self];
528 |     }
529 | }
530 | 
531 | - (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView {
532 |     [self recyclePagerViewIfNeed];
533 |     if ([_delegate respondsToSelector:@selector(pagerViewDidEndScrollingAnimation:)]) {
534 |         [_delegate pagerViewDidEndScrollingAnimation:self];
535 |     }
536 | }
537 | 
538 | - (void)pageViewTransformLayout:(SYACyclePageTransformLayout *)pagerViewTransformLayout initializeTransformAttributes:(UICollectionViewLayoutAttributes *)attributes {
539 |     if (_delegateFlags.initializeTransformAttributes) {
540 |         [_delegate pagerView:self initializeTransformAttributes:attributes];
541 |     }
542 | }
543 | 
544 | - (void)pageViewTransformLayout:(SYACyclePageTransformLayout *)pagerViewTransformLayout applyTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes {
545 |     if (_delegateFlags.applyTransformToAttributes) {
546 |         [_delegate pagerView:self applyTransformToAttributes:attributes];
547 |     }
548 | }
549 | 
550 | - (void)layoutSubviews {
551 |     [super layoutSubviews];
552 |     BOOL needUpdateLayout = !CGRectEqualToRect(_collectionView.frame, self.bounds);
553 |     _collectionView.frame = self.bounds;
554 |     if ((_indexSection.section < 0 || needUpdateLayout) && (_numberOfItems > 0 || _didReloadData)) {
555 |         _didLayout = YES;
556 |         [self setNeedUpdateLayout];
557 |     }
558 | }
559 | 
560 | - (void)dealloc {
561 |     ((SYACyclePageTransformLayout *)_collectionView.collectionViewLayout).delegate = nil;
562 |     _collectionView.delegate = nil;
563 |     _collectionView.dataSource = nil;
564 | }
565 | 
566 | @end
567 | 


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
 1 | MIT License
 2 | 
 3 | Copyright (c) 2017 
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | ## SYACyclePageView
 2 | * 简单实现多种轮播效果,自定义程度高
 3 | ## 集成方式
 4 | * pod 'SYACyclePageView'
 5 | ## 使用方式
 6 | * 参考demo中的使用方式
 7 | ## 效果展示
 8 | 1. 正常轮播
 9 | ![正常.gif](http://upload-images.jianshu.io/upload_images/1633901-05a4da998035ea9f.gif?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
10 | 2. 放缩轮播
11 | ![放缩.gif](http://upload-images.jianshu.io/upload_images/1633901-edc5d2fdc17b5057.gif?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
12 | 3. coverflow
13 | ![flow.gif](http://upload-images.jianshu.io/upload_images/1633901-d4637e7af627475a.gif?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
14 | ## 补充
15 | * 如果喜欢请star我,欢迎fork,让我们一起让他更完善
16 | 


--------------------------------------------------------------------------------
/SYACyclePageView.podspec:
--------------------------------------------------------------------------------
 1 | 
 2 | Pod::Spec.new do |s|
 3 |   s.name         = "SYACyclePageView"
 4 |   s.version      = "0.0.1"
 5 |   s.summary      = "iOS图片无限轮播框架,支持三种轮播方式"
 6 |   s.homepage     = "https://github.com/geekGetup/SYACyclePageView"
 7 |   s.license      = "MIT"
 8 |   s.author             = { "geekGetup" => "1044212178@qq.com" }
 9 |   s.platform     = :ios
10 |   s.platform     = :ios, "8.0"
11 |   s.source       = { :git => "https://github.com/geekGetup/SYACyclePageView.git", :tag => "#{s.version}" }
12 |   s.source_files  = "CyclePageView", "CyclePageView/**/*.{h,m}"
13 |   s.framework  = "UIKit"
14 | end
15 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo.xcodeproj/project.pbxproj:
--------------------------------------------------------------------------------
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 59 | 			);
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 62 | 		1BD615621FE162AC0005C3F3 /* Products */ = {
 63 | 			isa = PBXGroup;
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 65 | 				1BD615611FE162AC0005C3F3 /* SYACyclePageViewDemo.app */,
 66 | 			);
 67 | 			name = Products;
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 70 | 		1BD615631FE162AC0005C3F3 /* SYACyclePageViewDemo */ = {
 71 | 			isa = PBXGroup;
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 76 | 				1BD615991FE17F110005C3F3 /* TYPageControl.h */,
 77 | 				1BD615981FE17F110005C3F3 /* TYPageControl.m */,
 78 | 				1BD615941FE17EE50005C3F3 /* ViewController.h */,
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 86 | 				1BD615731FE162AC0005C3F3 /* main.m */,
 87 | 			);
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 97 | 				1BD6158E1FE170EB0005C3F3 /* SYACyclePageView.m */,
 98 | 			);
 99 | 			path = CyclePageView;
100 | 			sourceTree = "<group>";
101 | 		};
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103 | 
104 | /* Begin PBXNativeTarget section */
105 | 		1BD615601FE162AC0005C3F3 /* SYACyclePageViewDemo */ = {
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107 | 			buildConfigurationList = 1BD615771FE162AC0005C3F3 /* Build configuration list for PBXNativeTarget "SYACyclePageViewDemo" */;
108 | 			buildPhases = (
109 | 				1BD6155D1FE162AC0005C3F3 /* Sources */,
110 | 				1BD6155E1FE162AC0005C3F3 /* Frameworks */,
111 | 				1BD6155F1FE162AC0005C3F3 /* Resources */,
112 | 			);
113 | 			buildRules = (
114 | 			);
115 | 			dependencies = (
116 | 			);
117 | 			name = SYACyclePageViewDemo;
118 | 			productName = SYACyclePageViewDemo;
119 | 			productReference = 1BD615611FE162AC0005C3F3 /* SYACyclePageViewDemo.app */;
120 | 			productType = "com.apple.product-type.application";
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123 | 
124 | /* Begin PBXProject section */
125 | 		1BD615591FE162AB0005C3F3 /* Project object */ = {
126 | 			isa = PBXProject;
127 | 			attributes = {
128 | 				CLASSPREFIX = SYA;
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130 | 				ORGANIZATIONNAME = www.lejiakeji.com;
131 | 				TargetAttributes = {
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134 | 						ProvisioningStyle = Automatic;
135 | 					};
136 | 				};
137 | 			};
138 | 			buildConfigurationList = 1BD6155C1FE162AB0005C3F3 /* Build configuration list for PBXProject "SYACyclePageViewDemo" */;
139 | 			compatibilityVersion = "Xcode 8.0";
140 | 			developmentRegion = en;
141 | 			hasScannedForEncodings = 0;
142 | 			knownRegions = (
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146 | 			mainGroup = 1BD615581FE162AB0005C3F3;
147 | 			productRefGroup = 1BD615621FE162AC0005C3F3 /* Products */;
148 | 			projectDirPath = "";
149 | 			projectRoot = "";
150 | 			targets = (
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155 | 
156 | /* Begin PBXResourcesBuildPhase section */
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159 | 			buildActionMask = 2147483647;
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178 | 				1BD615831FE166110005C3F3 /* SYACyclePageTransformLayout.m in Sources */,
179 | 				1BD615661FE162AC0005C3F3 /* AppDelegate.m in Sources */,
180 | 				1BD6158F1FE170EB0005C3F3 /* SYACyclePageView.m in Sources */,
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182 | 			runOnlyForDeploymentPostprocessing = 0;
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239 | 				);
240 | 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
241 | 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
242 | 				GCC_WARN_UNDECLARED_SELECTOR = YES;
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248 | 				ONLY_ACTIVE_ARCH = YES;
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253 | 		1BD615761FE162AC0005C3F3 /* Release */ = {
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255 | 			buildSettings = {
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258 | 				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
259 | 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++14";
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265 | 				CLANG_WARN_COMMA = YES;
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267 | 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
268 | 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
269 | 				CLANG_WARN_EMPTY_BODY = YES;
270 | 				CLANG_WARN_ENUM_CONVERSION = YES;
271 | 				CLANG_WARN_INFINITE_RECURSION = YES;
272 | 				CLANG_WARN_INT_CONVERSION = YES;
273 | 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
274 | 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
275 | 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
276 | 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
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278 | 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
279 | 				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
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284 | 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
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288 | 				GCC_NO_COMMON_BLOCKS = YES;
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293 | 				GCC_WARN_UNUSED_FUNCTION = YES;
294 | 				GCC_WARN_UNUSED_VARIABLE = YES;
295 | 				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
296 | 				MTL_ENABLE_DEBUG_INFO = NO;
297 | 				SDKROOT = iphoneos;
298 | 				VALIDATE_PRODUCT = YES;
299 | 			};
300 | 			name = Release;
301 | 		};
302 | 		1BD615781FE162AC0005C3F3 /* Debug */ = {
303 | 			isa = XCBuildConfiguration;
304 | 			buildSettings = {
305 | 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
306 | 				CODE_SIGN_STYLE = Automatic;
307 | 				DEVELOPMENT_TEAM = S27786LSHW;
308 | 				INFOPLIST_FILE = SYACyclePageViewDemo/Info.plist;
309 | 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
310 | 				PRODUCT_BUNDLE_IDENTIFIER = com.lejiakeji.SYACyclePageViewDemo;
311 | 				PRODUCT_NAME = "$(TARGET_NAME)";
312 | 				TARGETED_DEVICE_FAMILY = "1,2";
313 | 			};
314 | 			name = Debug;
315 | 		};
316 | 		1BD615791FE162AC0005C3F3 /* Release */ = {
317 | 			isa = XCBuildConfiguration;
318 | 			buildSettings = {
319 | 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
320 | 				CODE_SIGN_STYLE = Automatic;
321 | 				DEVELOPMENT_TEAM = S27786LSHW;
322 | 				INFOPLIST_FILE = SYACyclePageViewDemo/Info.plist;
323 | 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks";
324 | 				PRODUCT_BUNDLE_IDENTIFIER = com.lejiakeji.SYACyclePageViewDemo;
325 | 				PRODUCT_NAME = "$(TARGET_NAME)";
326 | 				TARGETED_DEVICE_FAMILY = "1,2";
327 | 			};
328 | 			name = Release;
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331 | 
332 | /* Begin XCConfigurationList section */
333 | 		1BD6155C1FE162AB0005C3F3 /* Build configuration list for PBXProject "SYACyclePageViewDemo" */ = {
334 | 			isa = XCConfigurationList;
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337 | 				1BD615761FE162AC0005C3F3 /* Release */,
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339 | 			defaultConfigurationIsVisible = 0;
340 | 			defaultConfigurationName = Release;
341 | 		};
342 | 		1BD615771FE162AC0005C3F3 /* Build configuration list for PBXNativeTarget "SYACyclePageViewDemo" */ = {
343 | 			isa = XCConfigurationList;
344 | 			buildConfigurations = (
345 | 				1BD615781FE162AC0005C3F3 /* Debug */,
346 | 				1BD615791FE162AC0005C3F3 /* Release */,
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348 | 			defaultConfigurationIsVisible = 0;
349 | 			defaultConfigurationName = Release;
350 | 		};
351 | /* End XCConfigurationList section */
352 | 	};
353 | 	rootObject = 1BD615591FE162AB0005C3F3 /* Project object */;
354 | }
355 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo.xcodeproj/project.xcworkspace/contents.xcworkspacedata:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <Workspace
3 |    version = "1.0">
4 |    <FileRef
5 |       location = "self:SYACyclePageViewDemo.xcodeproj">
6 |    </FileRef>
7 | </Workspace>
8 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/AppDelegate.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.h
 3 | //  SYACyclePageViewDemo
 4 | //
 5 | //  Created by zq on 2017/12/13.
 6 | //  Copyright © 2017年 www.lejiakeji.com. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | @interface AppDelegate : UIResponder <UIApplicationDelegate>
12 | 
13 | @property (strong, nonatomic) UIWindow *window;
14 | 
15 | 
16 | @end
17 | 
18 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/AppDelegate.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  AppDelegate.m
 3 | //  SYACyclePageViewDemo
 4 | //
 5 | //  Created by zq on 2017/12/13.
 6 | //  Copyright © 2017年 www.lejiakeji.com. All rights reserved.
 7 | //
 8 | 
 9 | #import "AppDelegate.h"
10 | 
11 | @interface AppDelegate ()
12 | 
13 | @end
14 | 
15 | @implementation AppDelegate
16 | 
17 | 
18 | - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
19 |     // Override point for customization after application launch.
20 |     return YES;
21 | }
22 | 
23 | 
24 | - (void)applicationWillResignActive:(UIApplication *)application {
25 |     // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
26 |     // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
27 | }
28 | 
29 | 
30 | - (void)applicationDidEnterBackground:(UIApplication *)application {
31 |     // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
32 |     // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
33 | }
34 | 
35 | 
36 | - (void)applicationWillEnterForeground:(UIApplication *)application {
37 |     // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
38 | }
39 | 
40 | 
41 | - (void)applicationDidBecomeActive:(UIApplication *)application {
42 |     // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
43 | }
44 | 
45 | 
46 | - (void)applicationWillTerminate:(UIApplication *)application {
47 |     // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
48 | }
49 | 
50 | 
51 | @end
52 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/Assets.xcassets/AppIcon.appiconset/Contents.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "images" : [
 3 |     {
 4 |       "idiom" : "iphone",
 5 |       "size" : "20x20",
 6 |       "scale" : "2x"
 7 |     },
 8 |     {
 9 |       "idiom" : "iphone",
10 |       "size" : "20x20",
11 |       "scale" : "3x"
12 |     },
13 |     {
14 |       "idiom" : "iphone",
15 |       "size" : "29x29",
16 |       "scale" : "2x"
17 |     },
18 |     {
19 |       "idiom" : "iphone",
20 |       "size" : "29x29",
21 |       "scale" : "3x"
22 |     },
23 |     {
24 |       "idiom" : "iphone",
25 |       "size" : "40x40",
26 |       "scale" : "2x"
27 |     },
28 |     {
29 |       "idiom" : "iphone",
30 |       "size" : "40x40",
31 |       "scale" : "3x"
32 |     },
33 |     {
34 |       "idiom" : "iphone",
35 |       "size" : "60x60",
36 |       "scale" : "2x"
37 |     },
38 |     {
39 |       "idiom" : "iphone",
40 |       "size" : "60x60",
41 |       "scale" : "3x"
42 |     },
43 |     {
44 |       "idiom" : "ipad",
45 |       "size" : "20x20",
46 |       "scale" : "1x"
47 |     },
48 |     {
49 |       "idiom" : "ipad",
50 |       "size" : "20x20",
51 |       "scale" : "2x"
52 |     },
53 |     {
54 |       "idiom" : "ipad",
55 |       "size" : "29x29",
56 |       "scale" : "1x"
57 |     },
58 |     {
59 |       "idiom" : "ipad",
60 |       "size" : "29x29",
61 |       "scale" : "2x"
62 |     },
63 |     {
64 |       "idiom" : "ipad",
65 |       "size" : "40x40",
66 |       "scale" : "1x"
67 |     },
68 |     {
69 |       "idiom" : "ipad",
70 |       "size" : "40x40",
71 |       "scale" : "2x"
72 |     },
73 |     {
74 |       "idiom" : "ipad",
75 |       "size" : "76x76",
76 |       "scale" : "1x"
77 |     },
78 |     {
79 |       "idiom" : "ipad",
80 |       "size" : "76x76",
81 |       "scale" : "2x"
82 |     },
83 |     {
84 |       "idiom" : "ipad",
85 |       "size" : "83.5x83.5",
86 |       "scale" : "2x"
87 |     }
88 |   ],
89 |   "info" : {
90 |     "version" : 1,
91 |     "author" : "xcode"
92 |   }
93 | }


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/Base.lproj/LaunchScreen.storyboard:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" systemVersion="17A277" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
 3 |     <dependencies>
 4 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
 5 |         <capability name="Safe area layout guides" minToolsVersion="9.0"/>
 6 |         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
 7 |     </dependencies>
 8 |     <scenes>
 9 |         <!--View Controller-->
10 |         <scene sceneID="EHf-IW-A2E">
11 |             <objects>
12 |                 <viewController id="01J-lp-oVM" sceneMemberID="viewController">
13 |                     <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
14 |                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
15 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
16 |                         <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
17 |                         <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
18 |                     </view>
19 |                 </viewController>
20 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
21 |             </objects>
22 |             <point key="canvasLocation" x="53" y="375"/>
23 |         </scene>
24 |     </scenes>
25 | </document>
26 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/CyclePageView/SYACyclePageTransformLayout.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  SYACyclePageTransformLayout.h
 3 | //  SYACyclePageViewDemo
 4 | //
 5 | //  Created by zq on 2017/12/13.
 6 | //  Copyright © 2017年 www.lejiakeji.com. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | NS_ASSUME_NONNULL_BEGIN
12 | 
13 | typedef NS_ENUM(NSUInteger, SYACyclePageTransformLayoutType) {
14 |     SYACyclePageTransformLayoutNormal,
15 |     SYAyclePageTransformLayoutLinear,
16 |     SYACyclePageTransformLayoutCoverflow,
17 | };
18 | @class SYACyclePageTransformLayout;
19 | @protocol SYACyclePageTransformLayoutDelegate <NSObject>
20 | 
21 | - (void)pageViewTransformLayout:(SYACyclePageTransformLayout *)pageViewTransformLayout initializeTransformAttributes:(UICollectionViewLayoutAttributes *)attributes;
22 | 
23 | - (void)pageViewTransformLayout:(SYACyclePageTransformLayout *)pageViewTransformLayout applyTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes;
24 | 
25 | @end
26 | 
27 | @interface SYACyclePageViewLayout : NSObject
28 | 
29 | @property (nonatomic, assign) CGSize itemSize;
30 | 
31 | @property (nonatomic, assign) CGFloat itemSpacing;
32 | 
33 | @property (nonatomic, assign) UIEdgeInsets sectionInset;
34 | 
35 | @property (nonatomic, assign) SYACyclePageTransformLayoutType layoutType;
36 | 
37 | @property (nonatomic, assign) CGFloat minimumScale;
38 | 
39 | @property (nonatomic, assign) CGFloat minimumAlpha;
40 | 
41 | @property (nonatomic, assign) CGFloat maximumAngle;
42 | 
43 | @property (nonatomic, assign) BOOL isInfiniteLoop;
44 | 
45 | @property (nonatomic, assign) CGFloat rateOfChange;
46 | 
47 | @property (nonatomic, assign) BOOL adjustSpacingWhenScroling;
48 | 
49 | @property (nonatomic, assign) BOOL itemVerticalCenter;
50 | 
51 | @property (nonatomic, assign) BOOL itemHorizontalCenter;
52 | 
53 | // sectionInset
54 | @property (nonatomic, assign, readonly) UIEdgeInsets onlyOneSectionInset;
55 | @property (nonatomic, assign, readonly) UIEdgeInsets firstSectionInset;
56 | @property (nonatomic, assign, readonly) UIEdgeInsets lastSectionInset;
57 | @property (nonatomic, assign, readonly) UIEdgeInsets middleSectionInset;
58 | 
59 | @end
60 | 
61 | @interface SYACyclePageTransformLayout : UICollectionViewFlowLayout
62 | 
63 | @property (nonatomic, strong) SYACyclePageViewLayout *layout;
64 | 
65 | @property (nonatomic, weak) id<SYACyclePageTransformLayoutDelegate> delegate;
66 | 
67 | @end
68 | 
69 | NS_ASSUME_NONNULL_END
70 | 
71 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/CyclePageView/SYACyclePageTransformLayout.m:
--------------------------------------------------------------------------------
  1 | //
  2 | //  SYACyclePageTransformLayout.m
  3 | //  SYACyclePageViewDemo
  4 | //
  5 | //  Created by zq on 2017/12/13.
  6 | //  Copyright © 2017年 www.lejiakeji.com. All rights reserved.
  7 | //
  8 | 
  9 | #import "SYACyclePageTransformLayout.h"
 10 | typedef NS_ENUM(NSUInteger, SYATransformLayoutItemDirection) {
 11 |     SYATransformLayoutItemLeft,
 12 |     SYATransformLayoutItemCenter,
 13 |     SYATransformLayoutItemRight,
 14 | };
 15 | @interface SYACyclePageTransformLayout(){
 16 |     struct {
 17 |         unsigned int applyTransformToAttributes   :1;
 18 |         unsigned int initializeTransformAttributes   :1;
 19 |     }_delegateFlags;
 20 | }
 21 | @property (nonatomic, assign) BOOL applyTransformToAttributesDelegate;
 22 | 
 23 | @end
 24 | 
 25 | @interface SYACyclePageViewLayout()
 26 | 
 27 | @property (nonatomic, weak) UIView *pageView;
 28 | 
 29 | @end
 30 | 
 31 | @implementation SYACyclePageTransformLayout
 32 | - (instancetype)init {
 33 |     if (self = [super init]) {
 34 |         self.scrollDirection = UICollectionViewScrollDirectionHorizontal;
 35 |     }
 36 |     return self;
 37 | }
 38 | 
 39 | - (instancetype)initWithCoder:(NSCoder *)aDecoder {
 40 |     if (self = [super initWithCoder:aDecoder]) {
 41 |         self.scrollDirection = UICollectionViewScrollDirectionHorizontal;
 42 |     }
 43 |     return self;
 44 | }
 45 | 
 46 | - (void)setDelegate:(id<SYACyclePageTransformLayoutDelegate>)delegate {
 47 |     _delegate = delegate;
 48 |     _delegateFlags.initializeTransformAttributes = [delegate respondsToSelector:@selector(pageViewTransformLayout:initializeTransformAttributes:)];
 49 |     _delegateFlags.applyTransformToAttributes = [delegate respondsToSelector:@selector(pageViewTransformLayout:applyTransformToAttributes:)];
 50 | }
 51 | 
 52 | - (void)setLayout:(SYACyclePageViewLayout *)layout {
 53 |     _layout = layout;
 54 |     _layout.pageView = self.collectionView;
 55 |     self.itemSize = _layout.itemSize;
 56 |     self.minimumInteritemSpacing = _layout.itemSpacing;
 57 |     self.minimumLineSpacing = _layout.itemSpacing;
 58 | }
 59 | 
 60 | - (CGSize)itemSize {
 61 |     if (!_layout) {
 62 |         return [super itemSize];
 63 |     }
 64 |     return _layout.itemSize;
 65 | }
 66 | 
 67 | - (CGFloat)minimumLineSpacing {
 68 |     if (!_layout) {
 69 |         return [super minimumLineSpacing];
 70 |     }
 71 |     return _layout.itemSpacing;
 72 | }
 73 | 
 74 | - (CGFloat)minimumInteritemSpacing {
 75 |     if (!_layout) {
 76 |         return [super minimumInteritemSpacing];
 77 |     }
 78 |     return _layout.itemSpacing;
 79 | }
 80 | 
 81 | - (SYATransformLayoutItemDirection)directionWithCenterX:(CGFloat)centerX {
 82 |     SYATransformLayoutItemDirection direction= SYATransformLayoutItemRight;
 83 |     CGFloat contentCenterX = self.collectionView.contentOffset.x + CGRectGetWidth(self.collectionView.frame)/2;
 84 |     if (ABS(centerX - contentCenterX) < 0.5) {
 85 |         direction = SYATransformLayoutItemCenter;
 86 |     }else if (centerX - contentCenterX < 0) {
 87 |         direction = SYATransformLayoutItemLeft;
 88 |     }
 89 |     return direction;
 90 | }
 91 | 
 92 | #pragma mark - layout
 93 | 
 94 | -(BOOL)shouldInvalidateLayoutForBoundsChange:(CGRect)newBounds
 95 | {
 96 |     return _layout.layoutType == SYACyclePageTransformLayoutNormal ? [super shouldInvalidateLayoutForBoundsChange:newBounds] : YES;
 97 | }
 98 | 
 99 | - (NSArray<UICollectionViewLayoutAttributes *> *)layoutAttributesForElementsInRect:(CGRect)rect {
100 |     if (_delegateFlags.applyTransformToAttributes || _layout.layoutType != SYACyclePageTransformLayoutNormal) {
101 |         NSArray *attributesArray = [[NSArray alloc] initWithArray:[super layoutAttributesForElementsInRect:rect] copyItems:YES];
102 |         CGRect visibleRect = {self.collectionView.contentOffset,self.collectionView.bounds.size};
103 |         for (UICollectionViewLayoutAttributes *attributes in attributesArray) {
104 |             if (!CGRectIntersectsRect(visibleRect, attributes.frame)) {
105 |                 continue;
106 |             }
107 |             if (_delegateFlags.applyTransformToAttributes) {
108 |                 [_delegate pageViewTransformLayout:self applyTransformToAttributes:attributes];
109 |             }else {
110 |                 [self applyTransformToAttributes:attributes layoutType:_layout.layoutType];
111 |             }
112 |         }
113 |         return attributesArray;
114 |     }
115 |     return [super layoutAttributesForElementsInRect:rect];
116 | }
117 | 
118 | - (UICollectionViewLayoutAttributes *)layoutAttributesForItemAtIndexPath:(NSIndexPath *)indexPath {
119 |     UICollectionViewLayoutAttributes *attributes = [super layoutAttributesForItemAtIndexPath:indexPath];
120 |     if (_delegateFlags.initializeTransformAttributes) {
121 |         [_delegate pageViewTransformLayout:self initializeTransformAttributes:attributes];
122 |     }else if(_layout.layoutType != SYACyclePageTransformLayoutNormal){
123 |         [self initializeTransformAttributes:attributes layoutType:_layout.layoutType];
124 |     }
125 |     return attributes;
126 | }
127 | 
128 | #pragma mark - transform
129 | 
130 | - (void)initializeTransformAttributes:(UICollectionViewLayoutAttributes *)attributes layoutType:(SYACyclePageTransformLayoutType)layoutType {
131 |     switch (layoutType) {
132 |         case SYAyclePageTransformLayoutLinear:
133 |             [self applyLinearTransformToAttributes:attributes scale:_layout.minimumScale alpha:_layout.minimumAlpha];
134 |             break;
135 |         case SYACyclePageTransformLayoutCoverflow:
136 |         {
137 |             [self applyCoverflowTransformToAttributes:attributes angle:_layout.maximumAngle alpha:_layout.minimumAlpha];
138 |             break;
139 |         }
140 |         default:
141 |             break;
142 |     }
143 | }
144 | 
145 | - (void)applyTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes layoutType:(SYACyclePageTransformLayoutType)layoutType {
146 |     switch (layoutType) {
147 |         case SYAyclePageTransformLayoutLinear:
148 |             [self applyLinearTransformToAttributes:attributes];
149 |             break;
150 |         case SYACyclePageTransformLayoutCoverflow:
151 |             [self applyCoverflowTransformToAttributes:attributes];
152 |             break;
153 |         default:
154 |             break;
155 |     }
156 | }
157 | 
158 | #pragma mark - LinearTransform
159 | 
160 | - (void)applyLinearTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes {
161 |     CGFloat collectionViewWidth = self.collectionView.frame.size.width;
162 |     if (collectionViewWidth <= 0) {
163 |         return;
164 |     }
165 |     CGFloat centetX = self.collectionView.contentOffset.x + collectionViewWidth/2;
166 |     CGFloat delta = ABS(attributes.center.x - centetX);
167 |     CGFloat scale = MAX(1 - delta/collectionViewWidth*_layout.rateOfChange, _layout.minimumScale);
168 |     CGFloat alpha = MAX(1 - delta/collectionViewWidth, _layout.minimumAlpha);
169 |     [self applyLinearTransformToAttributes:attributes scale:scale alpha:alpha];
170 | }
171 | 
172 | - (void)applyLinearTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes scale:(CGFloat)scale alpha:(CGFloat)alpha {
173 |     CGAffineTransform transform = CGAffineTransformMakeScale(scale, scale);
174 |     if (_layout.adjustSpacingWhenScroling) {
175 |         SYATransformLayoutItemDirection direction = [self directionWithCenterX:attributes.center.x];
176 |         CGFloat translate = 0;
177 |         switch (direction) {
178 |             case SYATransformLayoutItemLeft:
179 |                 translate = 1.15 * attributes.size.width*(1-scale)/2;
180 |                 break;
181 |             case SYATransformLayoutItemRight:
182 |                 translate = -1.15 * attributes.size.width*(1-scale)/2;
183 |                 break;
184 |             default:
185 |                 // center
186 |                 scale = 1.0;
187 |                 alpha = 1.0;
188 |                 break;
189 |         }
190 |         transform = CGAffineTransformTranslate(transform,translate, 0);
191 |     }
192 |     attributes.transform = transform;
193 |     attributes.alpha = alpha;
194 | }
195 | 
196 | #pragma mark - CoverflowTransform
197 | 
198 | - (void)applyCoverflowTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes{
199 |     CGFloat collectionViewWidth = self.collectionView.frame.size.width;
200 |     if (collectionViewWidth <= 0) {
201 |         return;
202 |     }
203 |     CGFloat centetX = self.collectionView.contentOffset.x + collectionViewWidth/2;
204 |     CGFloat delta = ABS(attributes.center.x - centetX);
205 |     CGFloat angle = MIN(delta/collectionViewWidth*(1-_layout.rateOfChange), _layout.maximumAngle);
206 |     CGFloat alpha = MAX(1 - delta/collectionViewWidth, _layout.minimumAlpha);
207 |     [self applyCoverflowTransformToAttributes:attributes angle:angle alpha:alpha];
208 | }
209 | 
210 | - (void)applyCoverflowTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes angle:(CGFloat)angle alpha:(CGFloat)alpha {
211 |     SYATransformLayoutItemDirection direction = [self directionWithCenterX:attributes.center.x];
212 |     CATransform3D transform3D = CATransform3DIdentity;
213 |     transform3D.m34 = -0.002;
214 |     CGFloat translate = 0;
215 |     switch (direction) {
216 |         case SYATransformLayoutItemLeft:
217 |             translate = (1-cos(angle*1.2*M_PI))*attributes.size.width;
218 |             break;
219 |         case SYATransformLayoutItemRight:
220 |             translate = -(1-cos(angle*1.2*M_PI))*attributes.size.width;
221 |             angle = -angle;
222 |             break;
223 |         default:
224 |             // center
225 |             angle = 0;
226 |             alpha = 1;
227 |             break;
228 |     }
229 |     
230 |     transform3D = CATransform3DRotate(transform3D, M_PI*angle, 0, 1, 0);
231 |     if (_layout.adjustSpacingWhenScroling) {
232 |         transform3D = CATransform3DTranslate(transform3D, translate, 0, 0);
233 |     }
234 |     attributes.transform3D = transform3D;
235 |     attributes.alpha = alpha;
236 |     
237 | }
238 | @end
239 | 
240 | 
241 | @implementation SYACyclePageViewLayout
242 | 
243 | - (instancetype)init {
244 |     if (self = [super init]) {
245 |         _itemVerticalCenter = YES;
246 |         _minimumScale = 0.8;
247 |         _minimumAlpha = 1.0;
248 |         _maximumAngle = 0.2;
249 |         _rateOfChange = 0.4;
250 |         _adjustSpacingWhenScroling = YES;
251 |     }
252 |     return self;
253 | }
254 | 
255 | #pragma mark - getter
256 | 
257 | - (UIEdgeInsets)onlyOneSectionInset {
258 |     CGFloat leftSpace = _pageView && !_isInfiniteLoop && _itemHorizontalCenter ? (CGRectGetWidth(_pageView.frame) - _itemSize.width)/2 : _sectionInset.left;
259 |     CGFloat rightSpace = _pageView && !_isInfiniteLoop && _itemHorizontalCenter ? (CGRectGetWidth(_pageView.frame) - _itemSize.width)/2 : _sectionInset.right;
260 |     if (_itemVerticalCenter) {
261 |         CGFloat verticalSpace = (CGRectGetHeight(_pageView.frame) - _itemSize.height)/2;
262 |         return UIEdgeInsetsMake(verticalSpace, leftSpace, verticalSpace, rightSpace);
263 |     }
264 |     return UIEdgeInsetsMake(_sectionInset.top, leftSpace, _sectionInset.bottom, rightSpace);
265 | }
266 | 
267 | - (UIEdgeInsets)firstSectionInset {
268 |     if (_itemVerticalCenter) {
269 |         CGFloat verticalSpace = (CGRectGetHeight(_pageView.frame) - _itemSize.height)/2;
270 |         return UIEdgeInsetsMake(verticalSpace, _sectionInset.left, verticalSpace, _itemSpacing);
271 |     }
272 |     return UIEdgeInsetsMake(_sectionInset.top, _sectionInset.left, _sectionInset.bottom, _itemSpacing);
273 | }
274 | 
275 | - (UIEdgeInsets)lastSectionInset {
276 |     if (_itemVerticalCenter) {
277 |         CGFloat verticalSpace = (CGRectGetHeight(_pageView.frame) - _itemSize.height)/2;
278 |         return UIEdgeInsetsMake(verticalSpace, 0, verticalSpace, _sectionInset.right);
279 |     }
280 |     return UIEdgeInsetsMake(_sectionInset.top, 0, _sectionInset.bottom, _sectionInset.right);
281 | }
282 | 
283 | - (UIEdgeInsets)middleSectionInset {
284 |     if (_itemVerticalCenter) {
285 |         CGFloat verticalSpace = (CGRectGetHeight(_pageView.frame) - _itemSize.height)/2;
286 |         return UIEdgeInsetsMake(verticalSpace, 0, verticalSpace, _itemSpacing);
287 |     }
288 |     return _sectionInset;
289 | }
290 | @end
291 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/CyclePageView/SYACyclePageView.h:
--------------------------------------------------------------------------------
  1 | //
  2 | //  SYACyclePageView.h
  3 | //  SYACyclePageViewDemo
  4 | //
  5 | //  Created by zq on 2017/12/13.
  6 | //  Copyright © 2017年 www.lejiakeji.com. All rights reserved.
  7 | //
  8 | 
  9 | #import <UIKit/UIKit.h>
 10 | #import "SYACyclePageTransformLayout.h"
 11 | NS_ASSUME_NONNULL_BEGIN
 12 | typedef NS_ENUM(NSUInteger, SYAPageScrollDirection) {
 13 |     SYAPageScrollDirectionLeft,
 14 |     SYAPageScrollDirectionRight,
 15 | };
 16 | @class SYACyclePageView;
 17 | @protocol SYACyclePagerViewDataSource <NSObject>
 18 | 
 19 | - (NSInteger)numberOfItemsInPagerView:(SYACyclePageView *)pageView;
 20 | 
 21 | - (__kindof UICollectionViewCell *)pagerView:(SYACyclePageView *)pagerView cellForItemAtIndex:(NSInteger)index;
 22 | 
 23 | - (SYACyclePageViewLayout *)layoutForPagerView:(SYACyclePageView *)pageView;
 24 | 
 25 | @end
 26 | 
 27 | @protocol SYACyclePageViewDelegate <NSObject>
 28 | 
 29 | @optional
 30 | 
 31 | - (void)pagerView:(SYACyclePageView *)pageView didScrollFromIndex:(NSInteger)fromIndex toIndex:(NSInteger)toIndex;
 32 | 
 33 | - (void)pagerView:(SYACyclePageView *)pageView didSelectedItemCell:(__kindof UICollectionViewCell *)cell atIndex:(NSInteger)index;
 34 | 
 35 | - (void)pagerView:(SYACyclePageView *)pageView initializeTransformAttributes:(UICollectionViewLayoutAttributes *)attributes;
 36 | 
 37 | - (void)pagerView:(SYACyclePageView *)pageView applyTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes;
 38 | 
 39 | 
 40 | // scrollViewDelegate
 41 | 
 42 | - (void)pagerViewDidScroll:(SYACyclePageView *)pageView;
 43 | 
 44 | - (void)pagerViewWillBeginDragging:(SYACyclePageView *)pageView;
 45 | 
 46 | - (void)pagerViewDidEndDragging:(SYACyclePageView *)pageView willDecelerate:(BOOL)decelerate;
 47 | 
 48 | - (void)pagerViewWillBeginDecelerating:(SYACyclePageView *)pageView;
 49 | 
 50 | - (void)pagerViewDidEndDecelerating:(SYACyclePageView *)pageView;
 51 | 
 52 | - (void)pagerViewWillBeginScrollingAnimation:(SYACyclePageView *)pageView;
 53 | 
 54 | - (void)pagerViewDidEndScrollingAnimation:(SYACyclePageView *)pageView;
 55 | 
 56 | @end
 57 | @interface SYACyclePageView : UIView
 58 | 
 59 | @property (nonatomic, strong, nullable) UIView *backgroundView;
 60 | 
 61 | @property (nonatomic, weak, nullable) id<SYACyclePagerViewDataSource> dataSource;
 62 | 
 63 | @property (nonatomic, weak, nullable) id<SYACyclePageViewDelegate> delegate;
 64 | 
 65 | @property (nonatomic, weak, readonly) UICollectionView *collectionView;
 66 | 
 67 | @property (nonatomic, strong, readonly) SYACyclePageViewLayout *layout;
 68 | 
 69 | @property (nonatomic, assign) BOOL isInfiniteLoop;
 70 | 
 71 | @property (nonatomic, assign) CGFloat autoScrollInterval;
 72 | 
 73 | @property (nonatomic, assign, readonly) NSInteger curIndex;
 74 | 
 75 | @property (nonatomic, assign, readonly) CGPoint contentOffset;
 76 | 
 77 | @property (nonatomic, assign, readonly) BOOL tracking;
 78 | 
 79 | @property (nonatomic, assign, readonly) BOOL dragging;
 80 | 
 81 | @property (nonatomic, assign, readonly) BOOL decelerating;
 82 | 
 83 | - (void)reloadData;
 84 | 
 85 | - (void)updateData;
 86 | 
 87 | - (void)setNeedUpdateLayout;
 88 | 
 89 | - (void)setNeedClearLayout;
 90 | 
 91 | - (__kindof UICollectionViewCell * _Nullable)curIndexCell;
 92 | 
 93 | - (NSArray<__kindof UICollectionViewCell *> *_Nullable)visibleCells;
 94 | 
 95 | - (NSArray *)visibleIndexs;
 96 | 
 97 | - (void)scrollToItemAtIndex:(NSInteger)index animate:(BOOL)animate;
 98 | 
 99 | - (void)scrollToNearlyIndexAtDirection:(SYAPageScrollDirection)direction animate:(BOOL)animate;
100 | 
101 | - (void)registerClass:(Class)Class forCellWithReuseIdentifier:(NSString *)identifier;
102 | 
103 | - (void)registerNib:(UINib *)nib forCellWithReuseIdentifier:(NSString *)identifier;
104 | 
105 | - (__kindof UICollectionViewCell *)dequeueReusableCellWithReuseIdentifier:(NSString *)identifier forIndex:(NSInteger)index;
106 | @end
107 | NS_ASSUME_NONNULL_END
108 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/CyclePageView/SYACyclePageView.m:
--------------------------------------------------------------------------------
  1 | //
  2 | //  SYACyclePageView.m
  3 | //  SYACyclePageViewDemo
  4 | //
  5 | //  Created by zq on 2017/12/13.
  6 | //  Copyright © 2017年 www.lejiakeji.com. All rights reserved.
  7 | //
  8 | 
  9 | #import "SYACyclePageView.h"
 10 | typedef struct {
 11 |     NSInteger index;
 12 |     NSInteger section;
 13 | }SYAIndexSection;
 14 | 
 15 | NS_INLINE BOOL SYAEqualIndexSection(SYAIndexSection indexSection1,SYAIndexSection indexSection2) {
 16 |     return indexSection1.index == indexSection2.index && indexSection1.section == indexSection2.section;
 17 | }
 18 | 
 19 | NS_INLINE SYAIndexSection SYAMakeIndexSection(NSInteger index, NSInteger section) {
 20 |     SYAIndexSection indexSection;
 21 |     indexSection.index = index;
 22 |     indexSection.section = section;
 23 |     return indexSection;
 24 | }
 25 | 
 26 | @interface SYACyclePageView () <UICollectionViewDataSource, UICollectionViewDelegateFlowLayout, SYACyclePageTransformLayoutDelegate> {
 27 |     struct {
 28 |         unsigned int pagerViewDidScroll   :1;
 29 |         unsigned int didScrollFromIndexToNewIndex   :1;
 30 |         unsigned int initializeTransformAttributes   :1;
 31 |         unsigned int applyTransformToAttributes   :1;
 32 |     }_delegateFlags;
 33 |     struct {
 34 |         unsigned int cellForItemAtIndex   :1;
 35 |         unsigned int layoutForPagerView   :1;
 36 |     }_dataSourceFlags;
 37 | }
 38 | 
 39 | @property (nonatomic, weak) UICollectionView *collectionView;
 40 | @property (nonatomic, strong) SYACyclePageViewLayout *layout;
 41 | @property (nonatomic, strong) NSTimer *timer;
 42 | 
 43 | @property (nonatomic, assign) NSInteger numberOfItems;
 44 | 
 45 | @property (nonatomic, assign) SYAIndexSection indexSection; // current index
 46 | @property (nonatomic, assign) NSInteger dequeueSection;
 47 | @property (nonatomic, assign) SYAIndexSection beginDragIndexSection;
 48 | 
 49 | @property (nonatomic, assign) BOOL needClearLayout;
 50 | @property (nonatomic, assign) BOOL didReloadData;
 51 | @property (nonatomic, assign) BOOL didLayout;
 52 | @end
 53 | #define kPageViewMaxSectionCount 200
 54 | #define kPageViewMinSectionCount 18
 55 | @implementation SYACyclePageView
 56 | 
 57 | - (instancetype)initWithFrame:(CGRect)frame {
 58 |     if (self = [super initWithFrame:frame]) {
 59 |         [self configureProperty];
 60 |         
 61 |         [self addCollectionView];
 62 |     }
 63 |     return self;
 64 | }
 65 | 
 66 | - (instancetype)initWithCoder:(NSCoder *)aDecoder {
 67 |     if (self = [super initWithCoder:aDecoder]) {
 68 |         [self configureProperty];
 69 |         
 70 |         [self addCollectionView];
 71 |     }
 72 |     return self;
 73 | }
 74 | 
 75 | - (void)configureProperty {
 76 |     _didReloadData = NO;
 77 |     _didLayout = NO;
 78 |     _autoScrollInterval = 0;
 79 |     _isInfiniteLoop = YES;
 80 |     _beginDragIndexSection.index = 0;
 81 |     _beginDragIndexSection.section = 0;
 82 |     _indexSection.index = -1;
 83 |     _indexSection.section = -1;
 84 | }
 85 | 
 86 | - (void)addCollectionView {
 87 |     SYACyclePageTransformLayout *layout = [[SYACyclePageTransformLayout alloc]init];
 88 |     UICollectionView *collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:layout];
 89 |     layout.delegate = _delegateFlags.applyTransformToAttributes ? self : nil;;
 90 |     collectionView.backgroundColor = [UIColor clearColor];
 91 |     collectionView.dataSource = self;
 92 |     collectionView.delegate = self;
 93 |     collectionView.pagingEnabled = NO;
 94 |     collectionView.decelerationRate = 1-0.0076;
 95 |     if ([collectionView respondsToSelector:@selector(setPrefetchingEnabled:)]) {
 96 |         collectionView.prefetchingEnabled = NO;
 97 |     }
 98 |     collectionView.showsHorizontalScrollIndicator = NO;
 99 |     collectionView.showsVerticalScrollIndicator = NO;
100 |     [self addSubview:collectionView];
101 |     _collectionView = collectionView;
102 | }
103 | 
104 | - (void)willMoveToSuperview:(UIView *)newSuperview {
105 |     if (!newSuperview) {
106 |         [self removeTimer];
107 |     }else {
108 |         [self removeTimer];
109 |         if (_autoScrollInterval > 0) {
110 |             [self addTimer];
111 |         }
112 |     }
113 | }
114 | 
115 | #pragma mark - timer
116 | 
117 | - (void)addTimer {
118 |     if (_timer) {
119 |         return;
120 |     }
121 |     _timer = [NSTimer timerWithTimeInterval:_autoScrollInterval target:self selector:@selector(timerFired:) userInfo:nil repeats:YES];
122 |     [[NSRunLoop mainRunLoop] addTimer:_timer forMode:NSRunLoopCommonModes];
123 | }
124 | 
125 | - (void)removeTimer {
126 |     if (!_timer) {
127 |         return;
128 |     }
129 |     [_timer invalidate];
130 |     _timer = nil;
131 | }
132 | 
133 | - (void)timerFired:(NSTimer *)timer {
134 |     if (!self.superview || !self.window || _numberOfItems == 0 || self.tracking) {
135 |         return;
136 |     }
137 |     
138 |     [self scrollToNearlyIndexAtDirection:SYAPageScrollDirectionRight animate:YES];
139 | }
140 | 
141 | #pragma mark - getter
142 | 
143 | - (SYACyclePageViewLayout *)layout {
144 |     if (!_layout) {
145 |         if (_dataSourceFlags.layoutForPagerView) {
146 |             _layout = [_dataSource layoutForPagerView:self];
147 |             _layout.isInfiniteLoop = _isInfiniteLoop;
148 |         }
149 |         if (_layout.itemSize.width <= 0 || _layout.itemSize.height <= 0) {
150 |             _layout = nil;
151 |         }
152 |     }
153 |     return _layout;
154 | }
155 | 
156 | - (NSInteger)curIndex {
157 |     return _indexSection.index;
158 | }
159 | 
160 | - (CGPoint)contentOffset {
161 |     return _collectionView.contentOffset;
162 | }
163 | 
164 | - (BOOL)tracking {
165 |     return _collectionView.tracking;
166 | }
167 | 
168 | - (BOOL)dragging {
169 |     return _collectionView.dragging;
170 | }
171 | 
172 | - (BOOL)decelerating {
173 |     return _collectionView.decelerating;
174 | }
175 | 
176 | - (UIView *)backgroundView {
177 |     return _collectionView.backgroundView;
178 | }
179 | 
180 | - (__kindof UICollectionViewCell *)curIndexCell {
181 |     return [_collectionView cellForItemAtIndexPath:[NSIndexPath indexPathForItem:_indexSection.index inSection:_indexSection.section]];
182 | }
183 | 
184 | - (NSArray<__kindof UICollectionViewCell *> *)visibleCells {
185 |     return _collectionView.visibleCells;
186 | }
187 | 
188 | - (NSArray *)visibleIndexs {
189 |     NSMutableArray *indexs = [NSMutableArray array];
190 |     for (NSIndexPath *indexPath in _collectionView.indexPathsForVisibleItems) {
191 |         [indexs addObject:@(indexPath.item)];
192 |     }
193 |     return [indexs copy];
194 | }
195 | 
196 | #pragma mark - setter
197 | 
198 | - (void)setBackgroundView:(UIView *)backgroundView {
199 |     [_collectionView setBackgroundView:backgroundView];
200 | }
201 | 
202 | - (void)setAutoScrollInterval:(CGFloat)autoScrollInterval {
203 |     _autoScrollInterval = autoScrollInterval;
204 |     [self removeTimer];
205 |     if (autoScrollInterval > 0 && self.superview) {
206 |         [self addTimer];
207 |     }
208 | }
209 | 
210 | - (void)setDelegate:(id<SYACyclePageViewDelegate>)delegate {
211 |     _delegate = delegate;
212 |     _delegateFlags.pagerViewDidScroll = [delegate respondsToSelector:@selector(pagerViewDidScroll:)];
213 |     _delegateFlags.didScrollFromIndexToNewIndex = [delegate respondsToSelector:@selector(pagerView:didScrollFromIndex:toIndex:)];
214 |     _delegateFlags.initializeTransformAttributes = [delegate respondsToSelector:@selector(pagerView:initializeTransformAttributes:)];
215 |     _delegateFlags.applyTransformToAttributes = [delegate respondsToSelector:@selector(pagerView:applyTransformToAttributes:)];
216 |     if (self.collectionView && self.collectionView.collectionViewLayout) {
217 |         ((SYACyclePageTransformLayout *)self.collectionView.collectionViewLayout).delegate = _delegateFlags.applyTransformToAttributes ? self : nil;
218 |     }
219 | }
220 | 
221 | - (void)setDataSource:(id<SYACyclePagerViewDataSource>)dataSource {
222 |     _dataSource = dataSource;
223 |     _dataSourceFlags.cellForItemAtIndex = [dataSource respondsToSelector:@selector(pagerView:cellForItemAtIndex:)];
224 |     _dataSourceFlags.layoutForPagerView = [dataSource respondsToSelector:@selector(layoutForPagerView:)];
225 | }
226 | 
227 | #pragma mark - public
228 | 
229 | - (void)reloadData {
230 |     _didReloadData = YES;
231 |     [self setNeedClearLayout];
232 |     [self clearLayout];
233 |     [self updateData];
234 | }
235 | 
236 | // not clear layout
237 | - (void)updateData {
238 |     [self updateLayout];
239 |     _numberOfItems = [_dataSource numberOfItemsInPagerView:self];
240 |     [_collectionView reloadData];
241 |     if (!_didLayout && !CGRectIsEmpty(self.frame) && _indexSection.index < 0) {
242 |         _didLayout = YES;
243 |     }
244 |     [self resetPagerViewAtIndex:_indexSection.index < 0 && !CGRectIsEmpty(self.frame) ? 0 :_indexSection.index];
245 | }
246 | 
247 | - (void)scrollToNearlyIndexAtDirection:(SYAPageScrollDirection)direction animate:(BOOL)animate {
248 |     SYAIndexSection indexSection = [self nearlyIndexPathAtDirection:direction];
249 |     [self scrollToItemAtIndexSection:indexSection animate:animate];
250 | }
251 | 
252 | - (void)scrollToItemAtIndex:(NSInteger)index animate:(BOOL)animate {
253 |     if (!_isInfiniteLoop) {
254 |         [self scrollToItemAtIndexSection:SYAMakeIndexSection(index, 0) animate:animate];
255 |         return;
256 |     }
257 |     
258 |     [self scrollToItemAtIndexSection:SYAMakeIndexSection(index, index >= self.curIndex ? _indexSection.section : _indexSection.section+1) animate:YES];
259 | }
260 | 
261 | - (void)scrollToItemAtIndexSection:(SYAIndexSection)indexSection animate:(BOOL)animate {
262 |     if (_numberOfItems <= 0 || ![self isValidIndexSection:indexSection]) {
263 |         return;
264 |     }
265 |     
266 |     if (animate && [_delegate respondsToSelector:@selector(pagerViewWillBeginScrollingAnimation:)]) {
267 |         [_delegate pagerViewWillBeginScrollingAnimation:self];
268 |     }
269 |     CGFloat offset = [self caculateOffsetXAtIndexSection:indexSection];
270 |     [_collectionView setContentOffset:CGPointMake(offset, _collectionView.contentOffset.y) animated:animate];
271 | }
272 | 
273 | - (void)registerClass:(Class)Class forCellWithReuseIdentifier:(NSString *)identifier {
274 |     [_collectionView registerClass:Class forCellWithReuseIdentifier:identifier];
275 | }
276 | 
277 | - (void)registerNib:(UINib *)nib forCellWithReuseIdentifier:(NSString *)identifier {
278 |     [_collectionView registerNib:nib forCellWithReuseIdentifier:identifier];
279 | }
280 | 
281 | - (__kindof UICollectionViewCell *)dequeueReusableCellWithReuseIdentifier:(NSString *)identifier forIndex:(NSInteger)index {
282 |     UICollectionViewCell *cell = [_collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:[NSIndexPath indexPathForItem:index inSection:_dequeueSection]];
283 |     return cell;
284 | }
285 | 
286 | #pragma mark - configure layout
287 | 
288 | - (void)updateLayout {
289 |     if (!self.layout) {
290 |         return;
291 |     }
292 |     self.layout.isInfiniteLoop = _isInfiniteLoop;
293 |     ((SYACyclePageTransformLayout *)_collectionView.collectionViewLayout).layout = self.layout;
294 | }
295 | 
296 | - (void)clearLayout {
297 |     if (_needClearLayout) {
298 |         _layout = nil;
299 |         _needClearLayout = NO;
300 |     }
301 | }
302 | 
303 | - (void)setNeedClearLayout {
304 |     _needClearLayout = YES;
305 | }
306 | 
307 | - (void)setNeedUpdateLayout {
308 |     if (!self.layout) {
309 |         return;
310 |     }
311 |     [self clearLayout];
312 |     [self updateLayout];
313 |     [_collectionView.collectionViewLayout invalidateLayout];
314 |     [self resetPagerViewAtIndex:_indexSection.index < 0 ? 0 :_indexSection.index];
315 | }
316 | 
317 | #pragma mark - pager index
318 | 
319 | - (BOOL)isValidIndexSection:(SYAIndexSection)indexSection {
320 |     return indexSection.index >= 0 && indexSection.index < _numberOfItems && indexSection.section >= 0 && indexSection.section < kPageViewMaxSectionCount;
321 | }
322 | 
323 | - (SYAIndexSection)nearlyIndexPathAtDirection:(SYAPageScrollDirection)direction{
324 |     return [self nearlyIndexPathForIndexSection:_indexSection direction:direction];
325 | }
326 | 
327 | - (SYAIndexSection)nearlyIndexPathForIndexSection:(SYAIndexSection)indexSection direction:(SYAPageScrollDirection)direction {
328 |     if (indexSection.index < 0 || indexSection.index >= _numberOfItems) {
329 |         return indexSection;
330 |     }
331 |     
332 |     if (!_isInfiniteLoop) {
333 |         if (direction == SYAPageScrollDirectionRight && indexSection.index == _numberOfItems - 1) {
334 |             return _autoScrollInterval > 0 ? SYAMakeIndexSection(0, 0) : indexSection;
335 |         } else if (direction == SYAPageScrollDirectionRight) {
336 |             return SYAMakeIndexSection(indexSection.index+1, 0);
337 |         }
338 |         
339 |         if (indexSection.index == 0) {
340 |             return _autoScrollInterval > 0 ? SYAMakeIndexSection(_numberOfItems - 1, 0) : indexSection;
341 |         }
342 |         return SYAMakeIndexSection(indexSection.index-1, 0);
343 |     }
344 |     
345 |     if (direction == SYAPageScrollDirectionRight) {
346 |         if (indexSection.index < _numberOfItems-1) {
347 |             return SYAMakeIndexSection(indexSection.index+1, indexSection.section);
348 |         }
349 |         if (indexSection.section >= kPageViewMaxSectionCount-1) {
350 |             return SYAMakeIndexSection(indexSection.index, kPageViewMaxSectionCount-1);
351 |         }
352 |         return SYAMakeIndexSection(0, indexSection.section+1);
353 |     }
354 |     
355 |     if (indexSection.index > 0) {
356 |         return SYAMakeIndexSection(indexSection.index-1, indexSection.section);
357 |     }
358 |     if (indexSection.section <= 0) {
359 |         return SYAMakeIndexSection(indexSection.index, 0);
360 |     }
361 |     return SYAMakeIndexSection(_numberOfItems-1, indexSection.section-1);
362 | }
363 | 
364 | - (SYAIndexSection)caculateIndexSectionWithOffsetX:(CGFloat)offsetX {
365 |     if (_numberOfItems <= 0) {
366 |         return SYAMakeIndexSection(0, 0);
367 |     }
368 |     UICollectionViewFlowLayout *layout = (UICollectionViewFlowLayout *)_collectionView.collectionViewLayout;
369 |     CGFloat leftEdge = _isInfiniteLoop ? _layout.sectionInset.left : _layout.onlyOneSectionInset.left;
370 |     CGFloat width = CGRectGetWidth(_collectionView.frame);
371 |     CGFloat middleOffset = offsetX + width/2;
372 |     CGFloat itemWidth = layout.itemSize.width + layout.minimumInteritemSpacing;
373 |     NSInteger curIndex = 0;
374 |     NSInteger curSection = 0;
375 |     if (middleOffset - leftEdge >= 0) {
376 |         NSInteger itemIndex = (middleOffset - leftEdge+layout.minimumInteritemSpacing/2)/itemWidth;
377 |         if (itemIndex < 0) {
378 |             itemIndex = 0;
379 |         }else if (itemIndex >= _numberOfItems*kPageViewMaxSectionCount) {
380 |             itemIndex = _numberOfItems*kPageViewMaxSectionCount-1;
381 |         }
382 |         curIndex = itemIndex%_numberOfItems;
383 |         curSection = itemIndex/_numberOfItems;
384 |     }
385 |     return SYAMakeIndexSection(curIndex, curSection);
386 | }
387 | 
388 | - (CGFloat)caculateOffsetXAtIndexSection:(SYAIndexSection)indexSection{
389 |     if (_numberOfItems == 0) {
390 |         return 0;
391 |     }
392 |     UICollectionViewFlowLayout *layout = (UICollectionViewFlowLayout *)_collectionView.collectionViewLayout;
393 |     CGFloat leftEdge = _isInfiniteLoop ? _layout.sectionInset.left : _layout.onlyOneSectionInset.left;
394 |     CGFloat width = CGRectGetWidth(_collectionView.frame);
395 |     CGFloat itemWidth = layout.itemSize.width + layout.minimumInteritemSpacing;
396 |     CGFloat offsetX = leftEdge + itemWidth*(indexSection.index + indexSection.section*_numberOfItems) - layout.minimumInteritemSpacing/2 - (width - itemWidth)/2;
397 |     return MAX(offsetX, 0);
398 | }
399 | 
400 | - (void)resetPagerViewAtIndex:(NSInteger)index {
401 |     if (index < 0) {
402 |         return;
403 |     }
404 |     if (index >= _numberOfItems) {
405 |         index = 0;
406 |     }
407 |     [self scrollToItemAtIndexSection:SYAMakeIndexSection(index, _isInfiniteLoop ? kPageViewMaxSectionCount/3 : 0) animate:NO];
408 |     if (!_isInfiniteLoop && _indexSection.index < 0) {
409 |         [self scrollViewDidScroll:_collectionView];
410 |     }
411 | }
412 | 
413 | - (void)recyclePagerViewIfNeed {
414 |     if (!_isInfiniteLoop) {
415 |         return;
416 |     }
417 |     if (_indexSection.section > kPageViewMaxSectionCount - kPageViewMinSectionCount || _indexSection.section < kPageViewMinSectionCount) {
418 |         [self resetPagerViewAtIndex:_indexSection.index];
419 |     }
420 | }
421 | 
422 | #pragma mark - UICollectionViewDataSource
423 | 
424 | - (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
425 |     return _isInfiniteLoop ? kPageViewMaxSectionCount : 1;
426 | }
427 | 
428 | - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
429 |     _numberOfItems = [_dataSource numberOfItemsInPagerView:self];
430 |     return _numberOfItems;
431 | }
432 | 
433 | - (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
434 |     _dequeueSection = indexPath.section;
435 |     if (_dataSourceFlags.cellForItemAtIndex) {
436 |         return [_dataSource pagerView:self cellForItemAtIndex:indexPath.row];
437 |     }
438 |     NSAssert(NO, @"pagerView cellForItemAtIndex: is nil!");
439 |     return nil;
440 | }
441 | 
442 | #pragma mark - UICollectionViewDelegateFlowLayout
443 | 
444 | - (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
445 |     if (!_isInfiniteLoop) {
446 |         return _layout.onlyOneSectionInset;
447 |     }
448 |     if (section == 0 ) {
449 |         return _layout.firstSectionInset;
450 |     }else if (section == kPageViewMaxSectionCount -1) {
451 |         return _layout.lastSectionInset;
452 |     }
453 |     return _layout.middleSectionInset;
454 | }
455 | 
456 | - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
457 |     UICollectionViewCell *cell = [collectionView cellForItemAtIndexPath:indexPath];
458 |     if ([_delegate respondsToSelector:@selector(pagerView:didSelectedItemCell:atIndex:)]) {
459 |         [_delegate pagerView:self didSelectedItemCell:cell atIndex:indexPath.item];
460 |     }
461 | }
462 | 
463 | #pragma mark - UIScrollViewDelegate
464 | 
465 | - (void)scrollViewDidScroll:(UIScrollView *)scrollView {
466 |     if (!_didLayout) {
467 |         return;
468 |     }
469 |     SYAIndexSection newIndexSection =  [self caculateIndexSectionWithOffsetX:scrollView.contentOffset.x];
470 |     if (_numberOfItems <= 0 || ![self isValidIndexSection:newIndexSection]) {
471 |         NSLog(@"inVlaidIndexSection:(%ld,%ld)!",(long)newIndexSection.index,(long)newIndexSection.section);
472 |         return;
473 |     }
474 |     SYAIndexSection indexSection = _indexSection;
475 |     _indexSection = newIndexSection;
476 |     
477 |     if (_delegateFlags.pagerViewDidScroll) {
478 |         [_delegate pagerViewDidScroll:self];
479 |     }
480 |     
481 |     if (_delegateFlags.didScrollFromIndexToNewIndex && !SYAEqualIndexSection(_indexSection, indexSection)) {
482 |         [_delegate pagerView:self didScrollFromIndex:MAX(indexSection.index, 0) toIndex:_indexSection.index];
483 |     }
484 | }
485 | 
486 | - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
487 |     if (_autoScrollInterval > 0) {
488 |         [self removeTimer];
489 |     }
490 |     _beginDragIndexSection = [self caculateIndexSectionWithOffsetX:scrollView.contentOffset.x];
491 |     if ([_delegate respondsToSelector:@selector(pagerViewWillBeginDragging:)]) {
492 |         [_delegate pagerViewWillBeginDragging:self];
493 |     }
494 | }
495 | 
496 | - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset {
497 |     if (fabs(velocity.x) < 0.35 || !SYAEqualIndexSection(_beginDragIndexSection, _indexSection)) {
498 |         targetContentOffset->x = [self caculateOffsetXAtIndexSection:_indexSection];
499 |         return;
500 |     }
501 |     SYAPageScrollDirection direction = SYAPageScrollDirectionRight;
502 |     if ((scrollView.contentOffset.x < 0 && targetContentOffset->x <= 0) || (targetContentOffset->x < scrollView.contentOffset.x && scrollView.contentOffset.x < scrollView.contentSize.width - scrollView.frame.size.width)) {
503 |         direction = SYAPageScrollDirectionLeft;
504 |     }
505 |     SYAIndexSection indexSection = [self nearlyIndexPathForIndexSection:_indexSection direction:direction];
506 |     targetContentOffset->x = [self caculateOffsetXAtIndexSection:indexSection];
507 | }
508 | 
509 | - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {
510 |     if (_autoScrollInterval > 0) {
511 |         [self addTimer];
512 |     }
513 |     if ([_delegate respondsToSelector:@selector(pagerViewDidEndDragging:willDecelerate:)]) {
514 |         [_delegate pagerViewDidEndDragging:self willDecelerate:decelerate];
515 |     }
516 | }
517 | 
518 | - (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView {
519 |     if ([_delegate respondsToSelector:@selector(pagerViewWillBeginDecelerating:)]) {
520 |         [_delegate pagerViewWillBeginDecelerating:self];
521 |     }
522 | }
523 | 
524 | - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
525 |     [self recyclePagerViewIfNeed];
526 |     if ([_delegate respondsToSelector:@selector(pagerViewDidEndDecelerating:)]) {
527 |         [_delegate pagerViewDidEndDecelerating:self];
528 |     }
529 | }
530 | 
531 | - (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView {
532 |     [self recyclePagerViewIfNeed];
533 |     if ([_delegate respondsToSelector:@selector(pagerViewDidEndScrollingAnimation:)]) {
534 |         [_delegate pagerViewDidEndScrollingAnimation:self];
535 |     }
536 | }
537 | 
538 | - (void)pageViewTransformLayout:(SYACyclePageTransformLayout *)pagerViewTransformLayout initializeTransformAttributes:(UICollectionViewLayoutAttributes *)attributes {
539 |     if (_delegateFlags.initializeTransformAttributes) {
540 |         [_delegate pagerView:self initializeTransformAttributes:attributes];
541 |     }
542 | }
543 | 
544 | - (void)pageViewTransformLayout:(SYACyclePageTransformLayout *)pagerViewTransformLayout applyTransformToAttributes:(UICollectionViewLayoutAttributes *)attributes {
545 |     if (_delegateFlags.applyTransformToAttributes) {
546 |         [_delegate pagerView:self applyTransformToAttributes:attributes];
547 |     }
548 | }
549 | 
550 | - (void)layoutSubviews {
551 |     [super layoutSubviews];
552 |     BOOL needUpdateLayout = !CGRectEqualToRect(_collectionView.frame, self.bounds);
553 |     _collectionView.frame = self.bounds;
554 |     if ((_indexSection.section < 0 || needUpdateLayout) && (_numberOfItems > 0 || _didReloadData)) {
555 |         _didLayout = YES;
556 |         [self setNeedUpdateLayout];
557 |     }
558 | }
559 | 
560 | - (void)dealloc {
561 |     ((SYACyclePageTransformLayout *)_collectionView.collectionViewLayout).delegate = nil;
562 |     _collectionView.delegate = nil;
563 |     _collectionView.dataSource = nil;
564 | }
565 | 
566 | @end
567 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/Info.plist:
--------------------------------------------------------------------------------
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 4 | <dict>
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10 | 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
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12 | 	<string>6.0</string>
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14 | 	<string>$(PRODUCT_NAME)</string>
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24 | 	<string>LaunchScreen</string>
25 | 	<key>UIMainStoryboardFile</key>
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27 | 	<key>UIRequiredDeviceCapabilities</key>
28 | 	<array>
29 | 		<string>armv7</string>
30 | 	</array>
31 | 	<key>UISupportedInterfaceOrientations</key>
32 | 	<array>
33 | 		<string>UIInterfaceOrientationPortrait</string>
34 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
35 | 		<string>UIInterfaceOrientationLandscapeRight</string>
36 | 	</array>
37 | 	<key>UISupportedInterfaceOrientations~ipad</key>
38 | 	<array>
39 | 		<string>UIInterfaceOrientationPortrait</string>
40 | 		<string>UIInterfaceOrientationPortraitUpsideDown</string>
41 | 		<string>UIInterfaceOrientationLandscapeLeft</string>
42 | 		<string>UIInterfaceOrientationLandscapeRight</string>
43 | 	</array>
44 | </dict>
45 | </plist>
46 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/Main.storyboard:
--------------------------------------------------------------------------------
  1 | <?xml version="1.0" encoding="UTF-8"?>
  2 | <document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13771" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" colorMatched="YES" initialViewController="0Do-Z7-Y5L">
  3 |     <device id="retina4_7" orientation="portrait">
  4 |         <adaptation id="fullscreen"/>
  5 |     </device>
  6 |     <dependencies>
  7 |         <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13772"/>
  8 |         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
  9 |     </dependencies>
 10 |     <scenes>
 11 |         <!--View Controller-->
 12 |         <scene sceneID="tne-QT-ifu">
 13 |             <objects>
 14 |                 <viewController id="BYZ-38-t0r" customClass="ViewController" sceneMemberID="viewController">
 15 |                     <layoutGuides>
 16 |                         <viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
 17 |                         <viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
 18 |                     </layoutGuides>
 19 |                     <view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
 20 |                         <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
 21 |                         <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
 22 |                         <subviews>
 23 |                             <slider opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" value="0.80000000000000004" minValue="0.0" maxValue="1" translatesAutoresizingMaskIntoConstraints="NO" id="KIW-eI-tFE">
 24 |                                 <rect key="frame" x="105.5" y="414" width="204" height="28"/>
 25 |                                 <constraints>
 26 |                                     <constraint firstAttribute="width" constant="200" id="BHG-NL-56Y"/>
 27 |                                     <constraint firstAttribute="height" constant="27" id="wqP-NX-3WM"/>
 28 |                                 </constraints>
 29 |                                 <connections>
 30 |                                     <action selector="sliderValueChangeAction:" destination="BYZ-38-t0r" eventType="valueChanged" id="8sl-Nv-qxZ"/>
 31 |                                 </connections>
 32 |                             </slider>
 33 |                             <slider opaque="NO" tag="1" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" value="0.5" minValue="0.0" maxValue="1" translatesAutoresizingMaskIntoConstraints="NO" id="rS5-8u-U2g">
 34 |                                 <rect key="frame" x="105.5" y="491" width="204" height="28"/>
 35 |                                 <constraints>
 36 |                                     <constraint firstAttribute="height" constant="27" id="Bge-Z4-SCi"/>
 37 |                                     <constraint firstAttribute="width" constant="200" id="d8m-ig-BEi"/>
 38 |                                 </constraints>
 39 |                                 <connections>
 40 |                                     <action selector="sliderValueChangeAction:" destination="BYZ-38-t0r" eventType="valueChanged" id="vOU-vJ-TVu"/>
 41 |                                 </connections>
 42 |                             </slider>
 43 |                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="item尺寸" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="acx-TU-UY6">
 44 |                                 <rect key="frame" x="5" y="417" width="68" height="21"/>
 45 |                                 <fontDescription key="fontDescription" type="system" pointSize="17"/>
 46 |                                 <nil key="textColor"/>
 47 |                                 <nil key="highlightedColor"/>
 48 |                             </label>
 49 |                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="item间隔" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="83Q-ew-TeQ">
 50 |                                 <rect key="frame" x="5" y="494" width="68" height="21"/>
 51 |                                 <fontDescription key="fontDescription" type="system" pointSize="17"/>
 52 |                                 <nil key="textColor"/>
 53 |                                 <nil key="highlightedColor"/>
 54 |                             </label>
 55 |                             <switch opaque="NO" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" on="YES" translatesAutoresizingMaskIntoConstraints="NO" id="cc3-ac-b1N">
 56 |                                 <rect key="frame" x="104.5" y="333" width="51" height="31"/>
 57 |                                 <connections>
 58 |                                     <action selector="switchValueChangeAction:" destination="BYZ-38-t0r" eventType="valueChanged" id="R8I-M5-i0T"/>
 59 |                                 </connections>
 60 |                             </switch>
 61 |                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="循环滚动" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="rg8-Pz-4ij">
 62 |                                 <rect key="frame" x="5" y="338" width="69.5" height="21"/>
 63 |                                 <fontDescription key="fontDescription" type="system" pointSize="17"/>
 64 |                                 <nil key="textColor"/>
 65 |                                 <nil key="highlightedColor"/>
 66 |                             </label>
 67 |                             <switch opaque="NO" tag="1" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" on="YES" translatesAutoresizingMaskIntoConstraints="NO" id="wmL-Wn-2sN">
 68 |                                 <rect key="frame" x="278.5" y="333" width="51" height="31"/>
 69 |                                 <connections>
 70 |                                     <action selector="switchValueChangeAction:" destination="BYZ-38-t0r" eventType="valueChanged" id="Bt9-cW-NSf"/>
 71 |                                 </connections>
 72 |                             </switch>
 73 |                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="自动滚动" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="xSo-Y1-Iib">
 74 |                                 <rect key="frame" x="179" y="338.5" width="69.5" height="20.5"/>
 75 |                                 <fontDescription key="fontDescription" type="system" pointSize="17"/>
 76 |                                 <nil key="textColor"/>
 77 |                                 <nil key="highlightedColor"/>
 78 |                             </label>
 79 |                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="水平" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="eB9-6n-jhW">
 80 |                                 <rect key="frame" x="5" y="379" width="35" height="21"/>
 81 |                                 <fontDescription key="fontDescription" type="system" pointSize="17"/>
 82 |                                 <nil key="textColor"/>
 83 |                                 <nil key="highlightedColor"/>
 84 |                             </label>
 85 |                             <switch opaque="NO" tag="2" contentMode="scaleToFill" horizontalHuggingPriority="750" verticalHuggingPriority="750" contentHorizontalAlignment="center" contentVerticalAlignment="center" on="YES" translatesAutoresizingMaskIntoConstraints="NO" id="VwR-Ma-x2C">
 86 |                                 <rect key="frame" x="70.5" y="374" width="51" height="31"/>
 87 |                                 <connections>
 88 |                                     <action selector="switchValueChangeAction:" destination="BYZ-38-t0r" eventType="valueChanged" id="C1E-eL-eDU"/>
 89 |                                 </connections>
 90 |                             </switch>
 91 |                             <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="dlj-Pq-Dx4">
 92 |                                 <rect key="frame" x="89" y="546.5" width="31" height="30"/>
 93 |                                 <state key="normal" title="正常"/>
 94 |                                 <connections>
 95 |                                     <action selector="buttonAction:" destination="BYZ-38-t0r" eventType="touchUpInside" id="8GQ-Dc-WRX"/>
 96 |                                 </connections>
 97 |                             </button>
 98 |                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="layout" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="hx8-n3-bsS">
 99 |                                 <rect key="frame" x="5" y="551" width="38.5" height="21"/>
100 |                                 <fontDescription key="fontDescription" type="system" pointSize="17"/>
101 |                                 <nil key="textColor"/>
102 |                                 <nil key="highlightedColor"/>
103 |                             </label>
104 |                             <button opaque="NO" tag="1" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="SJE-bk-Jnk">
105 |                                 <rect key="frame" x="156" y="546.5" width="62" height="30"/>
106 |                                 <state key="normal" title="线性放缩"/>
107 |                                 <connections>
108 |                                     <action selector="buttonAction:" destination="BYZ-38-t0r" eventType="touchUpInside" id="qzk-j2-uC9"/>
109 |                                 </connections>
110 |                             </button>
111 |                             <button opaque="NO" tag="2" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" translatesAutoresizingMaskIntoConstraints="NO" id="tdW-rM-KNN">
112 |                                 <rect key="frame" x="254" y="546.5" width="70" height="30"/>
113 |                                 <state key="normal" title="Coverflow"/>
114 |                                 <connections>
115 |                                     <action selector="buttonAction:" destination="BYZ-38-t0r" eventType="touchUpInside" id="AxS-0j-0c0"/>
116 |                                 </connections>
117 |                             </button>
118 |                             <slider opaque="NO" tag="2" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" minValue="0.0" maxValue="1" translatesAutoresizingMaskIntoConstraints="NO" id="ScD-ms-DPG">
119 |                                 <rect key="frame" x="155.5" y="609.5" width="204" height="28"/>
120 |                                 <constraints>
121 |                                     <constraint firstAttribute="width" constant="200" id="0ZZ-OS-Rfl"/>
122 |                                     <constraint firstAttribute="height" constant="27" id="eKd-yp-bhi"/>
123 |                                 </constraints>
124 |                                 <connections>
125 |                                     <action selector="sliderValueChangeAction:" destination="BYZ-38-t0r" eventType="valueChanged" id="Q8L-aB-vtn"/>
126 |                                 </connections>
127 |                             </slider>
128 |                             <label opaque="NO" userInteractionEnabled="NO" contentMode="left" horizontalHuggingPriority="251" verticalHuggingPriority="251" text="pageControlSpace" textAlignment="natural" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" translatesAutoresizingMaskIntoConstraints="NO" id="GB6-FV-Urp">
129 |                                 <rect key="frame" x="5" y="612.5" width="142.5" height="21"/>
130 |                                 <fontDescription key="fontDescription" type="system" pointSize="17"/>
131 |                                 <nil key="textColor"/>
132 |                                 <nil key="highlightedColor"/>
133 |                             </label>
134 |                         </subviews>
135 |                         <color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
136 |                         <constraints>
137 |                             <constraint firstItem="GB6-FV-Urp" firstAttribute="centerY" secondItem="ScD-ms-DPG" secondAttribute="centerY" id="0Ah-FQ-6Hg"/>
138 |                             <constraint firstItem="wmL-Wn-2sN" firstAttribute="leading" secondItem="xSo-Y1-Iib" secondAttribute="trailing" constant="30" id="2MV-pm-vCA"/>
139 |                             <constraint firstItem="KIW-eI-tFE" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" constant="20" id="4NS-Lm-KFh"/>
140 |                             <constraint firstItem="xSo-Y1-Iib" firstAttribute="leading" secondItem="cc3-ac-b1N" secondAttribute="trailing" constant="25.5" id="7M9-bp-mXu"/>
141 |                             <constraint firstItem="GB6-FV-Urp" firstAttribute="top" secondItem="dlj-Pq-Dx4" secondAttribute="bottom" constant="36" id="8EE-pA-seT"/>
142 |                             <constraint firstItem="83Q-ew-TeQ" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="5" id="9gV-u6-2Cc"/>
143 |                             <constraint firstItem="rS5-8u-U2g" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" constant="20" id="H7n-Im-E3L"/>
144 |                             <constraint firstItem="eB9-6n-jhW" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="5" id="HxA-MM-dNi"/>
145 |                             <constraint firstItem="dlj-Pq-Dx4" firstAttribute="centerY" secondItem="SJE-bk-Jnk" secondAttribute="centerY" id="IwP-J0-Zjv"/>
146 |                             <constraint firstItem="SJE-bk-Jnk" firstAttribute="leading" secondItem="hx8-n3-bsS" secondAttribute="trailing" constant="112.5" id="Oix-fc-ZxW"/>
147 |                             <constraint firstItem="xSo-Y1-Iib" firstAttribute="centerY" secondItem="cc3-ac-b1N" secondAttribute="centerY" id="Q07-JJ-CSr"/>
148 |                             <constraint firstItem="tdW-rM-KNN" firstAttribute="leading" secondItem="SJE-bk-Jnk" secondAttribute="trailing" constant="36" id="T6B-Bk-YnJ"/>
149 |                             <constraint firstItem="xSo-Y1-Iib" firstAttribute="centerY" secondItem="wmL-Wn-2sN" secondAttribute="centerY" id="TeP-KL-zo0"/>
150 |                             <constraint firstItem="acx-TU-UY6" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="5" id="Wfv-fh-Hgh"/>
151 |                             <constraint firstItem="rg8-Pz-4ij" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="5" id="aGj-oP-3aR"/>
152 |                             <constraint firstItem="VwR-Ma-x2C" firstAttribute="leading" secondItem="eB9-6n-jhW" secondAttribute="trailing" constant="30" id="aRq-kJ-d4Y"/>
153 |                             <constraint firstItem="SJE-bk-Jnk" firstAttribute="leading" secondItem="dlj-Pq-Dx4" secondAttribute="trailing" constant="36" id="aXi-xA-I1D"/>
154 |                             <constraint firstItem="SJE-bk-Jnk" firstAttribute="centerX" secondItem="8bC-Xf-vdC" secondAttribute="centerX" id="cbp-HO-cX9"/>
155 |                             <constraint firstItem="cc3-ac-b1N" firstAttribute="leading" secondItem="rg8-Pz-4ij" secondAttribute="trailing" constant="30" id="cyp-c5-BFW"/>
156 |                             <constraint firstItem="eB9-6n-jhW" firstAttribute="centerY" secondItem="VwR-Ma-x2C" secondAttribute="centerY" id="dhB-3W-T1l"/>
157 |                             <constraint firstItem="hx8-n3-bsS" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="5" id="iE6-8N-yTs"/>
158 |                             <constraint firstItem="tdW-rM-KNN" firstAttribute="centerY" secondItem="SJE-bk-Jnk" secondAttribute="centerY" id="jZX-kj-3JL"/>
159 |                             <constraint firstItem="hx8-n3-bsS" firstAttribute="top" secondItem="83Q-ew-TeQ" secondAttribute="bottom" constant="36" id="kA6-1O-ciC"/>
160 |                             <constraint firstItem="acx-TU-UY6" firstAttribute="centerY" secondItem="KIW-eI-tFE" secondAttribute="centerY" id="mCy-6u-gil"/>
161 |                             <constraint firstItem="SJE-bk-Jnk" firstAttribute="centerY" secondItem="hx8-n3-bsS" secondAttribute="centerY" id="n01-jL-EbW"/>
162 |                             <constraint firstItem="rS5-8u-U2g" firstAttribute="top" secondItem="KIW-eI-tFE" secondAttribute="bottom" constant="50" id="oLW-fs-tsJ"/>
163 |                             <constraint firstItem="ScD-ms-DPG" firstAttribute="leading" secondItem="GB6-FV-Urp" secondAttribute="trailing" constant="10" id="rNT-l1-Gge"/>
164 |                             <constraint firstItem="eB9-6n-jhW" firstAttribute="top" secondItem="rg8-Pz-4ij" secondAttribute="bottom" constant="20" id="rXt-b3-PuL"/>
165 |                             <constraint firstItem="KIW-eI-tFE" firstAttribute="top" secondItem="cc3-ac-b1N" secondAttribute="bottom" constant="50" id="sZV-C7-V4r"/>
166 |                             <constraint firstItem="KIW-eI-tFE" firstAttribute="top" secondItem="y3c-jy-aDJ" secondAttribute="bottom" constant="350" id="t8A-Q7-Eb3"/>
167 |                             <constraint firstItem="rg8-Pz-4ij" firstAttribute="centerY" secondItem="cc3-ac-b1N" secondAttribute="centerY" id="ta7-cy-k50"/>
168 |                             <constraint firstItem="83Q-ew-TeQ" firstAttribute="centerY" secondItem="rS5-8u-U2g" secondAttribute="centerY" id="wxz-F8-jpM"/>
169 |                             <constraint firstItem="GB6-FV-Urp" firstAttribute="leading" secondItem="8bC-Xf-vdC" secondAttribute="leading" constant="5" id="zZ0-xo-mhS"/>
170 |                         </constraints>
171 |                     </view>
172 |                     <navigationItem key="navigationItem" id="l2a-T0-zBt"/>
173 |                 </viewController>
174 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
175 |             </objects>
176 |             <point key="canvasLocation" x="1418.4000000000001" y="138.98050974512745"/>
177 |         </scene>
178 |         <!--Navigation Controller-->
179 |         <scene sceneID="XHl-ef-E4e">
180 |             <objects>
181 |                 <navigationController automaticallyAdjustsScrollViewInsets="NO" id="0Do-Z7-Y5L" sceneMemberID="viewController">
182 |                     <toolbarItems/>
183 |                     <navigationBar key="navigationBar" contentMode="scaleToFill" insetsLayoutMarginsFromSafeArea="NO" id="j1x-og-n08">
184 |                         <rect key="frame" x="0.0" y="20" width="375" height="44"/>
185 |                         <autoresizingMask key="autoresizingMask"/>
186 |                     </navigationBar>
187 |                     <nil name="viewControllers"/>
188 |                     <connections>
189 |                         <segue destination="BYZ-38-t0r" kind="relationship" relationship="rootViewController" id="vb2-m6-rBS"/>
190 |                     </connections>
191 |                 </navigationController>
192 |                 <placeholder placeholderIdentifier="IBFirstResponder" id="DKY-Bw-VvH" userLabel="First Responder" sceneMemberID="firstResponder"/>
193 |             </objects>
194 |             <point key="canvasLocation" x="727" y="146"/>
195 |         </scene>
196 |     </scenes>
197 | </document>
198 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/TYCyclePagerViewCell.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  TYCyclePagerViewCell.h
 3 | //  TYCyclePagerViewDemo
 4 | //
 5 | //  Created by tany on 2017/6/14.
 6 | //  Copyright © 2017年 tany. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | @interface TYCyclePagerViewCell : UICollectionViewCell
12 | 
13 | @property (nonatomic, weak, readonly) UILabel *label;
14 | 
15 | @end
16 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/TYCyclePagerViewCell.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  TYCyclePagerViewCell.m
 3 | //  TYCyclePagerViewDemo
 4 | //
 5 | //  Created by tany on 2017/6/14.
 6 | //  Copyright © 2017年 tany. All rights reserved.
 7 | //
 8 | 
 9 | #import "TYCyclePagerViewCell.h"
10 | 
11 | @interface TYCyclePagerViewCell ()
12 | @property (nonatomic, weak) UILabel *label;
13 | @end
14 | 
15 | @implementation TYCyclePagerViewCell
16 | 
17 | - (instancetype)initWithFrame:(CGRect)frame {
18 |     if (self = [super initWithFrame:frame]) {
19 |         self.backgroundColor = [UIColor clearColor];
20 |         [self addLabel];
21 |     }
22 |     return self;
23 | }
24 | 
25 | - (instancetype)initWithCoder:(NSCoder *)aDecoder {
26 |     if (self = [super initWithCoder:aDecoder]) {
27 |         self.backgroundColor = [UIColor clearColor];
28 |         [self addLabel];
29 |     }
30 |     return self;
31 | }
32 | 
33 | 
34 | - (void)addLabel {
35 |     UILabel *label = [[UILabel alloc]init];
36 |     label.textAlignment = NSTextAlignmentCenter;
37 |     label.textColor = [UIColor whiteColor];
38 |     label.font = [UIFont systemFontOfSize:18];
39 |     [self addSubview:label];
40 |     _label = label;
41 | }
42 | 
43 | - (void)layoutSubviews {
44 |     [super layoutSubviews];
45 |     _label.frame = self.bounds;
46 | }
47 | 
48 | @end
49 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/TYPageControl.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  TYPageControl.h
 3 | //  TYCyclePagerViewDemo
 4 | //
 5 | //  Created by tany on 2017/6/20.
 6 | //  Copyright © 2017年 tany. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | NS_ASSUME_NONNULL_BEGIN
12 | 
13 | @interface TYPageControl : UIControl
14 | 
15 | @property (nonatomic, assign) NSInteger numberOfPages;          // default is 0
16 | @property (nonatomic, assign) NSInteger currentPage;            // default is 0. value pinned to 0..numberOfPages-1
17 | 
18 | @property (nonatomic, assign) BOOL hidesForSinglePage;          // hide the the indicator if there is only one page. default is NO
19 | 
20 | @property (nonatomic, assign) CGFloat pageIndicatorSpaing;
21 | @property (nonatomic, assign) UIEdgeInsets contentInset; // center will ignore this
22 | @property (nonatomic, assign ,readonly) CGSize contentSize; // real content size
23 | 
24 | // override super 
25 | //@property (nonatomic, assign) UIControlContentVerticalAlignment contentVerticalAlignment;     // how to position content vertically inside control. default is center
26 | //@property (nonatomic, assign) UIControlContentHorizontalAlignment contentHorizontalAlignment; // how to position content hozontally inside control. default is center
27 | 
28 | // indicatorTint color
29 | @property (nullable, nonatomic,strong) UIColor *pageIndicatorTintColor;
30 | @property (nullable, nonatomic,strong) UIColor *currentPageIndicatorTintColor;
31 | 
32 | // indicator image
33 | @property (nullable, nonatomic,strong) UIImage *pageIndicatorImage;
34 | @property (nullable, nonatomic,strong) UIImage *currentPageIndicatorImage;
35 | 
36 | @property (nonatomic, assign) UIViewContentMode indicatorImageContentMode; // default is UIViewContentModeCenter
37 | 
38 | @property (nonatomic, assign) CGSize pageIndicatorSize; // indicator size
39 | @property (nonatomic, assign) CGSize currentPageIndicatorSize; // default pageIndicatorSize
40 | 
41 | @property (nonatomic, assign) CGFloat animateDuring; // default 0.3
42 | 
43 | - (void)setCurrentPage:(NSInteger)currentPage animate:(BOOL)animate;
44 | 
45 | @end
46 | 
47 | NS_ASSUME_NONNULL_END
48 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/TYPageControl.m:
--------------------------------------------------------------------------------
  1 | //
  2 | //  TYPageControl.m
  3 | //  TYCyclePagerViewDemo
  4 | //
  5 | //  Created by tany on 2017/6/20.
  6 | //  Copyright © 2017年 tany. All rights reserved.
  7 | //
  8 | 
  9 | #import "TYPageControl.h"
 10 | 
 11 | @interface TYPageControl ()
 12 | // UI
 13 | @property (nonatomic, strong) NSArray<UIImageView *> *indicatorViews;
 14 | 
 15 | // Data
 16 | @property (nonatomic, assign) BOOL forceUpdate;
 17 | 
 18 | @end
 19 | 
 20 | @implementation TYPageControl
 21 | 
 22 | #pragma mark - life cycle
 23 | 
 24 | - (instancetype)initWithFrame:(CGRect)frame {
 25 |     if (self = [super initWithFrame:frame]) {
 26 |         [self configurePropertys];
 27 |     }
 28 |     return self;
 29 | }
 30 | 
 31 | - (instancetype)initWithCoder:(NSCoder *)aDecoder {
 32 |     if (self = [super initWithCoder:aDecoder]) {
 33 |         [self configurePropertys];
 34 |     }
 35 |     return self;
 36 | }
 37 | 
 38 | - (void)configurePropertys {
 39 |     self.userInteractionEnabled = NO;
 40 |     _forceUpdate = NO;
 41 |     _animateDuring = 0.3;
 42 |     _pageIndicatorSpaing = 10;
 43 |     _indicatorImageContentMode = UIViewContentModeCenter;
 44 |     _pageIndicatorSize = CGSizeMake(6,6);
 45 |     _currentPageIndicatorSize = _pageIndicatorSize;
 46 |     _pageIndicatorTintColor = [UIColor colorWithRed:128/255. green:128/255. blue:128/255. alpha:1];
 47 |     _currentPageIndicatorTintColor = [UIColor whiteColor];
 48 | }
 49 | 
 50 | - (void)willMoveToSuperview:(UIView *)newSuperview {
 51 |     [super willMoveToSuperview:newSuperview];
 52 |     if (newSuperview) {
 53 |         _forceUpdate = YES;
 54 |         [self updateIndicatorViews];
 55 |         _forceUpdate = NO;
 56 |     }
 57 | }
 58 | 
 59 | #pragma mark - getter setter
 60 | 
 61 | - (CGSize)contentSize {
 62 |     CGFloat width = (_indicatorViews.count - 1) * (_pageIndicatorSize.width + _pageIndicatorSpaing) + _pageIndicatorSize.width + _contentInset.left +_contentInset.right;
 63 |     CGFloat height = _currentPageIndicatorSize.height + _contentInset.top + _contentInset.bottom;
 64 |     return CGSizeMake(width, height);
 65 | }
 66 | 
 67 | - (void)setNumberOfPages:(NSInteger)numberOfPages {
 68 |     if (numberOfPages == _numberOfPages) {
 69 |         return;
 70 |     }
 71 |     _numberOfPages = numberOfPages;
 72 |     if (_currentPage >= numberOfPages) {
 73 |         _currentPage = 0;
 74 |     }
 75 |     [self updateIndicatorViews];
 76 |     if (_indicatorViews.count > 0) {
 77 |         [self setNeedsLayout];
 78 |     }
 79 | }
 80 | 
 81 | - (void)setCurrentPage:(NSInteger)currentPage {
 82 |     if (_currentPage == currentPage || _indicatorViews.count <= currentPage) {
 83 |         return;
 84 |     }
 85 |     _currentPage = currentPage;
 86 |     if (!CGSizeEqualToSize(_currentPageIndicatorSize, _pageIndicatorSize)) {
 87 |         [self setNeedsLayout];
 88 |     }
 89 |     [self updateIndicatorViewsBehavior];
 90 |     if (self.userInteractionEnabled) {
 91 |         [self sendActionsForControlEvents:UIControlEventValueChanged];
 92 |     }
 93 | }
 94 | 
 95 | - (void)setCurrentPage:(NSInteger)currentPage animate:(BOOL)animate {
 96 |     if (animate) {
 97 |         [UIView animateWithDuration:_animateDuring animations:^{
 98 |             [self setCurrentPage:currentPage];
 99 |         }];
100 |     }else {
101 |         [self setCurrentPage:currentPage];
102 |     }
103 | }
104 | 
105 | - (void)setPageIndicatorImage:(UIImage *)pageIndicatorImage {
106 |     _pageIndicatorImage = pageIndicatorImage;
107 |     [self updateIndicatorViewsBehavior];
108 | }
109 | 
110 | - (void)setCurrentPageIndicatorImage:(UIImage *)currentPageIndicatorImage {
111 |     _currentPageIndicatorImage = currentPageIndicatorImage;
112 |     [self updateIndicatorViewsBehavior];
113 | }
114 | 
115 | - (void)setPageIndicatorTintColor:(UIColor *)pageIndicatorTintColor {
116 |     _pageIndicatorTintColor = pageIndicatorTintColor;
117 |     [self updateIndicatorViewsBehavior];
118 | }
119 | 
120 | - (void)setCurrentPageIndicatorTintColor:(UIColor *)currentPageIndicatorTintColor {
121 |     _currentPageIndicatorTintColor = currentPageIndicatorTintColor;
122 |     [self updateIndicatorViewsBehavior];
123 | }
124 | 
125 | - (void)setPageIndicatorSize:(CGSize)pageIndicatorSize {
126 |     if (CGSizeEqualToSize(_pageIndicatorSize, pageIndicatorSize)) {
127 |         return;
128 |     }
129 |     _pageIndicatorSize = pageIndicatorSize;
130 |     if (CGSizeEqualToSize(_currentPageIndicatorSize, CGSizeZero) || (_currentPageIndicatorSize.width < pageIndicatorSize.width && _currentPageIndicatorSize.height < pageIndicatorSize.height)) {
131 |         _currentPageIndicatorSize = pageIndicatorSize;
132 |     }
133 |     if (_indicatorViews.count > 0) {
134 |         [self setNeedsLayout];
135 |     }
136 | }
137 | 
138 | - (void)setPageIndicatorSpaing:(CGFloat)pageIndicatorSpaing {
139 |     _pageIndicatorSpaing = pageIndicatorSpaing;
140 |     if (_indicatorViews.count > 0) {
141 |         [self setNeedsLayout];
142 |     }
143 | }
144 | 
145 | - (void)setCurrentPageIndicatorSize:(CGSize)currentPageIndicatorSize {
146 |     if (CGSizeEqualToSize(_currentPageIndicatorSize, currentPageIndicatorSize)) {
147 |         return;
148 |     }
149 |     _currentPageIndicatorSize = currentPageIndicatorSize;
150 |     if (_indicatorViews.count > 0) {
151 |         [self setNeedsLayout];
152 |     }
153 | }
154 | 
155 | - (void)setContentHorizontalAlignment:(UIControlContentHorizontalAlignment)contentHorizontalAlignment {
156 |     [super setContentHorizontalAlignment:contentHorizontalAlignment];
157 |     if (_indicatorViews.count > 0) {
158 |         [self setNeedsLayout];
159 |     }
160 | }
161 | 
162 | - (void)setContentVerticalAlignment:(UIControlContentVerticalAlignment)contentVerticalAlignment {
163 |     [super setContentVerticalAlignment:contentVerticalAlignment];
164 |     if (_indicatorViews.count > 0) {
165 |         [self setNeedsLayout];
166 |     }
167 | }
168 | 
169 | #pragma mark - update indicator
170 | 
171 | - (void)updateIndicatorViews {
172 |     if (!self.superview && !_forceUpdate) {
173 |         return;
174 |     }
175 |     if (_indicatorViews.count == _numberOfPages) {
176 |         [self updateIndicatorViewsBehavior];
177 |         return;
178 |     }
179 |     NSMutableArray *indicatorViews = _indicatorViews ? [_indicatorViews mutableCopy] :[NSMutableArray array];
180 |     if (indicatorViews.count < _numberOfPages) {
181 |         for (NSInteger idx = indicatorViews.count; idx < _numberOfPages; ++idx) {
182 |             UIImageView *indicatorView = [[UIImageView alloc]init];
183 |             indicatorView.contentMode = _indicatorImageContentMode;
184 |             [self addSubview:indicatorView];
185 |             [indicatorViews addObject:indicatorView];
186 |         }
187 |     }else if (indicatorViews.count > _numberOfPages) {
188 |         for (NSInteger idx = indicatorViews.count - 1; idx >= _numberOfPages; --idx) {
189 |             UIImageView *indicatorView = indicatorViews[idx];
190 |             [indicatorView removeFromSuperview];
191 |             [indicatorViews removeObjectAtIndex:idx];
192 |         }
193 |     }
194 |     _indicatorViews = [indicatorViews copy];
195 |     [self updateIndicatorViewsBehavior];
196 | }
197 | 
198 | - (void)updateIndicatorViewsBehavior {
199 |     if (_indicatorViews.count == 0 || (!self.superview && !_forceUpdate)) {
200 |         return;
201 |     }
202 |     if (_hidesForSinglePage && _indicatorViews.count == 1) {
203 |         UIImageView *indicatorView = _indicatorViews.lastObject;
204 |         indicatorView.hidden = YES;
205 |     }
206 |     NSInteger index = 0;
207 |     for (UIImageView *indicatorView in _indicatorViews) {
208 |         if (_pageIndicatorImage) {
209 |             indicatorView.contentMode = _indicatorImageContentMode;
210 |             indicatorView.image = _currentPage == index ? _currentPageIndicatorImage : _pageIndicatorImage;
211 |         }else {
212 |             indicatorView.image = nil;
213 |             indicatorView.backgroundColor = _currentPage == index ? _currentPageIndicatorTintColor : _pageIndicatorTintColor;
214 |         }
215 |         indicatorView.hidden = NO;
216 |         ++index;
217 |     }
218 | }
219 | 
220 | #pragma mark - layout
221 | 
222 | - (void)layoutIndicatorViews {
223 |     if (_indicatorViews.count == 0) {
224 |         return;
225 |     }
226 |     CGFloat orignX = 0;
227 |     CGFloat centerY = 0;
228 |     CGFloat pageIndicatorSpaing = _pageIndicatorSpaing;
229 |     switch (self.contentHorizontalAlignment) {
230 |         case UIControlContentHorizontalAlignmentCenter:
231 |             // ignore contentInset
232 |             orignX = (CGRectGetWidth(self.frame) - (_indicatorViews.count - 1) * (_pageIndicatorSize.width + _pageIndicatorSpaing) - _pageIndicatorSize.width)/2;
233 |             break;
234 |         case UIControlContentHorizontalAlignmentLeft:
235 |             orignX = _contentInset.left;
236 |             break;
237 |         case UIControlContentHorizontalAlignmentRight:
238 |             orignX = CGRectGetWidth(self.frame) - ((_indicatorViews.count - 1) * (_pageIndicatorSize.width + _pageIndicatorSpaing) - _pageIndicatorSize.width) - _contentInset.right;
239 |             break;
240 |         case UIControlContentHorizontalAlignmentFill:
241 |             orignX = _contentInset.left;
242 |             if (_indicatorViews.count > 1) {
243 |                 pageIndicatorSpaing = (CGRectGetWidth(self.frame) - _contentInset.left - _contentInset.right - _pageIndicatorSize.width - (_indicatorViews.count - 1) * _pageIndicatorSize.width)/(_indicatorViews.count - 1);
244 |             }
245 |             break;
246 |         default:
247 |             break;
248 |     }
249 |     switch (self.contentVerticalAlignment) {
250 |         case UIControlContentVerticalAlignmentCenter:
251 |             centerY = CGRectGetHeight(self.frame)/2;
252 |             break;
253 |         case UIControlContentVerticalAlignmentTop:
254 |             centerY = _contentInset.top + _currentPageIndicatorSize.height/2;
255 |             break;
256 |         case UIControlContentVerticalAlignmentBottom:
257 |             centerY = CGRectGetHeight(self.frame) - _currentPageIndicatorSize.height/2 - _contentInset.bottom;
258 |             break;
259 |         case UIControlContentVerticalAlignmentFill:
260 |             centerY = (CGRectGetHeight(self.frame) - _contentInset.top - _contentInset.bottom)/2 + _contentInset.top;
261 |             break;
262 |         default:
263 |             break;
264 |     }
265 |     NSInteger index = 0;
266 |     for (UIImageView *indicatorView in _indicatorViews) {
267 |         if (_pageIndicatorImage) {
268 |             indicatorView.layer.cornerRadius = 0;
269 |         }else {
270 |             indicatorView.layer.cornerRadius = _currentPage == index ? _currentPageIndicatorSize.width/2 : _pageIndicatorSize.width/2;
271 |         }
272 |         CGSize size = index == _currentPage ? _currentPageIndicatorSize : _pageIndicatorSize;
273 |         indicatorView.frame = CGRectMake(orignX - (size.width - _pageIndicatorSize.width)/2, centerY - size.height/2, size.width, size.height);
274 |         orignX += _pageIndicatorSize.width + pageIndicatorSpaing;
275 |         ++index;
276 |     }
277 | }
278 | 
279 | - (void)layoutSubviews {
280 |     [super layoutSubviews];
281 |     [self layoutIndicatorViews];
282 | }
283 | 
284 | @end
285 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/ViewController.h:
--------------------------------------------------------------------------------
 1 | //
 2 | //  ViewController.h
 3 | //  TYCyclePagerViewDemo
 4 | //
 5 | //  Created by tany on 2017/6/14.
 6 | //  Copyright © 2017年 tany. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | 
11 | @interface ViewController : UIViewController
12 | 
13 | 
14 | @end
15 | 
16 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/ViewController.m:
--------------------------------------------------------------------------------
  1 | //
  2 | //  ViewController.m
  3 | //  TYCyclePagerViewDemo
  4 | //
  5 | //  Created by tany on 2017/6/14.
  6 | //  Copyright © 2017年 tany. All rights reserved.
  7 | //
  8 | 
  9 | #import "ViewController.h"
 10 | #import "SYACyclePageView.h"
 11 | #import "TYPageControl.h"
 12 | #import "TYCyclePagerViewCell.h"
 13 | 
 14 | @interface ViewController () <SYACyclePageViewDelegate, SYACyclePagerViewDataSource>
 15 | 
 16 | @property (nonatomic, strong) SYACyclePageView *pagerView;
 17 | @property (nonatomic, strong) TYPageControl *pageControl;
 18 | @property (nonatomic, strong) NSArray *datas;
 19 | 
 20 | @end
 21 | 
 22 | @implementation ViewController
 23 | 
 24 | - (void)viewDidLoad {
 25 |     [super viewDidLoad];
 26 |     // Do any additional setup after loading the view, typically from a nib.
 27 |     self.title = @"TYCyclePagerView";
 28 |     [self addPagerView];
 29 |     [self addPageControl];
 30 |     
 31 |     [self loadData];
 32 | }
 33 | 
 34 | - (void)addPagerView {
 35 |     SYACyclePageView *pagerView = [[SYACyclePageView alloc]init];
 36 |     pagerView.layer.borderWidth = 1;
 37 |     pagerView.isInfiniteLoop = YES;
 38 |     pagerView.autoScrollInterval = 3.0;
 39 |     pagerView.dataSource = self;
 40 |     pagerView.delegate = self;
 41 |     pagerView.layout.layoutType = SYAyclePageTransformLayoutLinear;
 42 |     // registerClass or registerNib
 43 |     [pagerView registerClass:[TYCyclePagerViewCell class] forCellWithReuseIdentifier:@"cellId"];
 44 |     [self.view addSubview:pagerView];
 45 |     _pagerView = pagerView;
 46 | }
 47 | 
 48 | - (void)addPageControl {
 49 |     TYPageControl *pageControl = [[TYPageControl alloc]init];
 50 |     //pageControl.numberOfPages = _datas.count;
 51 |     pageControl.currentPageIndicatorSize = CGSizeMake(8, 8);
 52 | //    pageControl.pageIndicatorImage = [UIImage imageNamed:@"Dot"];
 53 | //    pageControl.currentPageIndicatorImage = [UIImage imageNamed:@"DotSelected"];
 54 | //    pageControl.contentInset = UIEdgeInsetsMake(0, 20, 0, 20);
 55 | //    pageControl.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
 56 | //    pageControl.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
 57 | //    [pageControl addTarget:self action:@selector(pageControlValueChangeAction:) forControlEvents:UIControlEventValueChanged];
 58 |     [_pagerView addSubview:pageControl];
 59 |     _pageControl = pageControl;
 60 | }
 61 | 
 62 | - (void)viewWillLayoutSubviews {
 63 |     [super viewWillLayoutSubviews];
 64 |     _pagerView.frame = CGRectMake(0, 64, CGRectGetWidth(self.view.frame), 200);
 65 |     _pageControl.frame = CGRectMake(0, CGRectGetHeight(_pagerView.frame) - 26, CGRectGetWidth(_pagerView.frame), 26);
 66 | }
 67 | 
 68 | - (void)loadData {
 69 |     NSMutableArray *datas = [NSMutableArray array];
 70 |     for (int i = 0; i < 7; ++i) {
 71 |         if (i == 0) {
 72 |             [datas addObject:[UIColor redColor]];
 73 |             continue;
 74 |         }
 75 |         [datas addObject:[UIColor colorWithRed:arc4random()%255/255.0 green:arc4random()%255/255.0 blue:arc4random()%255/255.0 alpha:arc4random()%255/255.0]];
 76 |     }
 77 |     _datas = [datas copy];
 78 |     _pageControl.numberOfPages = _datas.count;
 79 |     [_pagerView reloadData];
 80 | }
 81 | 
 82 | //- (void)loadData {
 83 | //    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
 84 | //        NSMutableArray *datas = [NSMutableArray array];
 85 | //        for (int i = 0; i < 5; ++i) {
 86 | //            if (i == 0) {
 87 | //                [datas addObject:[UIColor redColor]];
 88 | //                continue;
 89 | //            }
 90 | //            [datas addObject:[UIColor colorWithRed:arc4random()%255/255.0 green:arc4random()%255/255.0 blue:arc4random()%255/255.0 alpha:arc4random()%255/255.0]];
 91 | //        }
 92 | //        _datas = [datas copy];
 93 | //        _pageControl.numberOfPages = _datas.count;
 94 | //        [_pagerView reloadData];
 95 | //    });
 96 | //}
 97 | 
 98 | #pragma mark - TYCyclePagerViewDataSource
 99 | 
100 | - (NSInteger)numberOfItemsInPagerView:(SYACyclePageView *)pageView {
101 |     return _datas.count;
102 | }
103 | 
104 | - (UICollectionViewCell *)pagerView:(SYACyclePageView *)pagerView cellForItemAtIndex:(NSInteger)index {
105 |     TYCyclePagerViewCell *cell = [pagerView dequeueReusableCellWithReuseIdentifier:@"cellId" forIndex:index];
106 | //    cell.backgroundColor = _datas[index];
107 |     
108 |     cell.backgroundColor = [UIColor orangeColor];
109 |     
110 |     cell.label.text = [NSString stringWithFormat:@"index->%ld",index];
111 |     
112 |     cell.layer.shadowColor = [UIColor blackColor].CGColor;
113 |     cell.layer.shadowOffset = CGSizeMake(2,2);
114 |     cell.layer.shadowRadius = 2.0f;
115 |     cell.layer.shadowOpacity = 0.4f;
116 |     cell.layer.masksToBounds = NO;
117 |     cell.layer.shadowPath = [UIBezierPath bezierPathWithRoundedRect:cell.bounds cornerRadius:cell.contentView.layer.cornerRadius].CGPath;
118 | 
119 |     cell.layer.cornerRadius = 7;
120 |     cell.contentView.layer.cornerRadius = 7.0f;
121 |     cell.contentView.layer.borderWidth = 0.7f;
122 |     cell.contentView.layer.borderColor = [UIColor clearColor].CGColor;
123 |     cell.contentView.layer.masksToBounds = YES;
124 |     return cell;
125 | }
126 | 
127 | - (SYACyclePageViewLayout *)layoutForPagerView:(SYACyclePageView *)pageView {
128 |     SYACyclePageViewLayout *layout = [[SYACyclePageViewLayout alloc]init];
129 |     layout.itemSize = CGSizeMake(CGRectGetWidth(pageView.frame)*0.8, CGRectGetHeight(pageView.frame)*0.8);
130 |     layout.itemSpacing = 15;
131 |     //layout.minimumAlpha = 0.3;
132 |     layout.itemHorizontalCenter = YES;
133 |     return layout;
134 | }
135 | 
136 | - (void)pagerView:(SYACyclePageView *)pageView didScrollFromIndex:(NSInteger)fromIndex toIndex:(NSInteger)toIndex {
137 |     _pageControl.currentPage = toIndex;
138 |     //[_pageControl setCurrentPage:newIndex animate:YES];
139 |     NSLog(@"%ld ->  %ld",fromIndex,toIndex);
140 | }
141 | 
142 | #pragma mark - action
143 | 
144 | - (IBAction)switchValueChangeAction:(UISwitch *)sender {
145 |     if (sender.tag == 0) {
146 |         _pagerView.isInfiniteLoop = sender.isOn;
147 |         [_pagerView updateData];
148 |     }else if (sender.tag == 1) {
149 |         _pagerView.autoScrollInterval = sender.isOn ? 3.0:0;
150 |     }else if (sender.tag == 2) {
151 |         _pagerView.layout.itemHorizontalCenter = sender.isOn;
152 |         [UIView animateWithDuration:0.3 animations:^{
153 |             [_pagerView setNeedUpdateLayout];
154 |         }];
155 |     }
156 | }
157 | 
158 | - (IBAction)sliderValueChangeAction:(UISlider *)sender {
159 |     if (sender.tag == 0) {
160 |         _pagerView.layout.itemSize = CGSizeMake(CGRectGetWidth(_pagerView.frame)*sender.value, CGRectGetHeight(_pagerView.frame)*sender.value);
161 |         [_pagerView setNeedUpdateLayout];
162 |     }else if (sender.tag == 1) {
163 |         _pagerView.layout.itemSpacing = 30*sender.value;
164 |         [_pagerView setNeedUpdateLayout];
165 |     }else if (sender.tag == 2) {
166 |         _pageControl.pageIndicatorSize = CGSizeMake(6*(1+sender.value), 6*(1+sender.value));
167 |         _pageControl.currentPageIndicatorSize = CGSizeMake(8*(1+sender.value), 8*(1+sender.value));
168 |         _pageControl.pageIndicatorSpaing = (1+sender.value)*10;
169 |     }
170 | }
171 | 
172 | - (IBAction)buttonAction:(UIButton *)sender {
173 |     _pagerView.layout.layoutType = sender.tag;
174 |     [_pagerView setNeedUpdateLayout];
175 | }
176 | 
177 | - (void)pageControlValueChangeAction:(TYPageControl *)sender {
178 |     NSLog(@"pageControlValueChangeAction: %ld",sender.currentPage);
179 | }
180 | 
181 | - (void)didReceiveMemoryWarning {
182 |     [super didReceiveMemoryWarning];
183 |     // Dispose of any resources that can be recreated.
184 | }
185 | 
186 | 
187 | @end
188 | 


--------------------------------------------------------------------------------
/SYACyclePageViewDemo/SYACyclePageViewDemo/main.m:
--------------------------------------------------------------------------------
 1 | //
 2 | //  main.m
 3 | //  SYACyclePageViewDemo
 4 | //
 5 | //  Created by zq on 2017/12/13.
 6 | //  Copyright © 2017年 www.lejiakeji.com. All rights reserved.
 7 | //
 8 | 
 9 | #import <UIKit/UIKit.h>
10 | #import "AppDelegate.h"
11 | 
12 | int main(int argc, char * argv[]) {
13 |     @autoreleasepool {
14 |         return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
15 |     }
16 | }
17 | 


--------------------------------------------------------------------------------