├── image.gif ├── README.md ├── CollectionViewSubscriptionLabel.xcodeproj ├── project.xcworkspace │ └── contents.xcworkspacedata ├── xcuserdata │ └── chenyk.xcuserdatad │ │ └── xcschemes │ │ ├── xcschememanagement.plist │ │ └── CollectionViewSubscriptionLabel.xcscheme └── project.pbxproj ├── CollectionViewSubscriptionLabel ├── ViewController.h ├── AppDelegate.h ├── CollectionViewCell.h ├── main.m ├── CollectionHeaderView.h ├── Images.xcassets │ └── AppIcon.appiconset │ │ └── Contents.json ├── CollectionHeaderView.m ├── CollectionViewCell.m ├── Info.plist ├── Base.lproj │ ├── Main.storyboard │ └── LaunchScreen.xib ├── UICollectionViewLeftAlignedLayout │ ├── UICollectionViewLeftAlignedLayout.h │ └── UICollectionViewLeftAlignedLayout.m ├── AppDelegate.m └── ViewController.m └── CollectionViewSubscriptionLabelTests ├── Info.plist └── CollectionViewSubscriptionLabelTests.m /image.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/chenyk0317/CollectionViewSubscriptionLabel/HEAD/image.gif -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # CollectionViewSubscriptionLabel 2 | 3 | CollectionView实现自选标签选择器 4 | 5 | ![image](/image.gif) 6 | 7 | 8 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel/ViewController.h: -------------------------------------------------------------------------------- 1 | // 2 | // ViewController.h 3 | // CollectionViewSubscriptionLabel 4 | // 5 | // Created by chenyk on 15/4/24. 6 | // Copyright (c) 2015年 chenyk. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | @interface ViewController : UIViewController 12 | 13 | 14 | @end 15 | 16 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel/AppDelegate.h: -------------------------------------------------------------------------------- 1 | // 2 | // AppDelegate.h 3 | // CollectionViewSubscriptionLabel 4 | // 5 | // Created by chenyk on 15/4/24. 6 | // Copyright (c) 2015年 chenyk. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | @interface AppDelegate : UIResponder 12 | 13 | @property (strong, nonatomic) UIWindow *window; 14 | 15 | 16 | @end 17 | 18 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel/CollectionViewCell.h: -------------------------------------------------------------------------------- 1 | // 2 | // CollectionViewCell.h 3 | // CollectionViewSubscriptionLabel 4 | // 5 | // Created by chenyk on 15/4/24. 6 | // Copyright (c) 2015年 chenyk. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | @interface CollectionViewCell : UICollectionViewCell 12 | @property (nonatomic, strong) UILabel * titleLabel; 13 | 14 | 15 | @end 16 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel/main.m: -------------------------------------------------------------------------------- 1 | // 2 | // main.m 3 | // CollectionViewSubscriptionLabel 4 | // 5 | // Created by chenyk on 15/4/24. 6 | // Copyright (c) 2015年 chenyk. All rights reserved. 7 | // 8 | 9 | #import 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 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel/CollectionHeaderView.h: -------------------------------------------------------------------------------- 1 | // 2 | // CollectionHeaderView.h 3 | // CollectionViewSubscriptionLabel 4 | // 5 | // Created by chenyk on 15/4/24. 6 | // Copyright (c) 2015年 chenyk. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | extern float CYLFilterHeaderViewHeigt; 12 | 13 | 14 | @interface CollectionHeaderView : UICollectionReusableView 15 | 16 | @property (nonatomic,strong)UILabel * titleLabel; 17 | 18 | 19 | @end 20 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel.xcodeproj/xcuserdata/chenyk.xcuserdatad/xcschemes/xcschememanagement.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | SchemeUserState 6 | 7 | CollectionViewSubscriptionLabel.xcscheme 8 | 9 | orderHint 10 | 0 11 | 12 | 13 | SuppressBuildableAutocreation 14 | 15 | E150BAB71AEA0DB0007D25B4 16 | 17 | primary 18 | 19 | 20 | E150BAD01AEA0DB0007D25B4 21 | 22 | primary 23 | 24 | 25 | 26 | 27 | 28 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel/Images.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "iphone", 5 | "size" : "29x29", 6 | "scale" : "2x" 7 | }, 8 | { 9 | "idiom" : "iphone", 10 | "size" : "29x29", 11 | "scale" : "3x" 12 | }, 13 | { 14 | "idiom" : "iphone", 15 | "size" : "40x40", 16 | "scale" : "2x" 17 | }, 18 | { 19 | "idiom" : "iphone", 20 | "size" : "40x40", 21 | "scale" : "3x" 22 | }, 23 | { 24 | "idiom" : "iphone", 25 | "size" : "60x60", 26 | "scale" : "2x" 27 | }, 28 | { 29 | "idiom" : "iphone", 30 | "size" : "60x60", 31 | "scale" : "3x" 32 | } 33 | ], 34 | "info" : { 35 | "version" : 1, 36 | "author" : "xcode" 37 | } 38 | } -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabelTests/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | com.juniorchina.$(PRODUCT_NAME:rfc1034identifier) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | BNDL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | 1 23 | 24 | 25 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabelTests/CollectionViewSubscriptionLabelTests.m: -------------------------------------------------------------------------------- 1 | // 2 | // CollectionViewSubscriptionLabelTests.m 3 | // CollectionViewSubscriptionLabelTests 4 | // 5 | // Created by chenyk on 15/4/24. 6 | // Copyright (c) 2015年 chenyk. All rights reserved. 7 | // 8 | 9 | #import 10 | #import 11 | 12 | @interface CollectionViewSubscriptionLabelTests : XCTestCase 13 | 14 | @end 15 | 16 | @implementation CollectionViewSubscriptionLabelTests 17 | 18 | - (void)setUp { 19 | [super setUp]; 20 | // Put setup code here. This method is called before the invocation of each test method in the class. 21 | } 22 | 23 | - (void)tearDown { 24 | // Put teardown code here. This method is called after the invocation of each test method in the class. 25 | [super tearDown]; 26 | } 27 | 28 | - (void)testExample { 29 | // This is an example of a functional test case. 30 | XCTAssert(YES, @"Pass"); 31 | } 32 | 33 | - (void)testPerformanceExample { 34 | // This is an example of a performance test case. 35 | [self measureBlock:^{ 36 | // Put the code you want to measure the time of here. 37 | }]; 38 | } 39 | 40 | @end 41 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel/CollectionHeaderView.m: -------------------------------------------------------------------------------- 1 | // 2 | // CollectionHeaderView.m 3 | // CollectionViewSubscriptionLabel 4 | // 5 | // Created by chenyk on 15/4/24. 6 | // Copyright (c) 2015年 chenyk. All rights reserved. 7 | // 8 | 9 | #import "CollectionHeaderView.h" 10 | 11 | #define kTitleButtonWidth 250.f 12 | #define kMoreButtonWidth 36*2 13 | #define kCureOfLineHight 0.5 14 | #define kCureOfLineOffX 16 15 | 16 | float CYLFilterHeaderViewHeigt = 38; 17 | 18 | @implementation CollectionHeaderView 19 | - (id)initWithFrame:(CGRect)frame 20 | { 21 | self = [super initWithFrame:frame]; 22 | if (self) { 23 | self = [self sharedInit]; 24 | } 25 | return self; 26 | } 27 | - (id)initWithCoder: (NSCoder *)aDecoder { 28 | self = [super initWithCoder: aDecoder]; 29 | if (self) { 30 | self = [self sharedInit]; 31 | } 32 | return self; 33 | } 34 | 35 | - (id)sharedInit { 36 | self.backgroundColor = [UIColor colorWithRed:188.0/255.0 green:188.0/255.0 blue:188.0/255.0 alpha:1.0]; 37 | self.titleLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 200, 30)]; 38 | self.titleLabel.text = @"我的订阅"; 39 | [self addSubview:self.titleLabel]; 40 | return self; 41 | } 42 | 43 | @end 44 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel/CollectionViewCell.m: -------------------------------------------------------------------------------- 1 | // 2 | // CollectionViewCell.m 3 | // CollectionViewSubscriptionLabel 4 | // 5 | // Created by chenyk on 15/4/24. 6 | // Copyright (c) 2015年 chenyk. All rights reserved. 7 | // 8 | 9 | #import "CollectionViewCell.h" 10 | 11 | @implementation CollectionViewCell 12 | - (id)initWithFrame:(CGRect)frame 13 | { 14 | self = [super initWithFrame:frame]; 15 | if (self) { 16 | [self setup]; 17 | } 18 | return self; 19 | } 20 | 21 | - (id)initWithCoder: (NSCoder *)aDecoder { 22 | self = [super initWithCoder: aDecoder]; 23 | if (self) { 24 | self = [self sharedInit]; 25 | } 26 | return self; 27 | } 28 | - (id)sharedInit { 29 | [self setup]; 30 | return self; 31 | } 32 | 33 | - (void)setup { 34 | self.titleLabel = [UILabel new]; 35 | self.titleLabel.frame = CGRectMake(0, 0, self.bounds.size.width, self.bounds.size.height); 36 | self.titleLabel.textAlignment = NSTextAlignmentCenter; 37 | self.titleLabel.font = [UIFont systemFontOfSize:14]; 38 | 39 | self.titleLabel.layer.cornerRadius = 5.0; 40 | self.titleLabel.backgroundColor = [UIColor whiteColor]; 41 | self.titleLabel.layer.borderWidth = 1; 42 | self.titleLabel.layer.masksToBounds = YES; 43 | 44 | [self.contentView addSubview:self.titleLabel]; 45 | } 46 | 47 | 48 | @end 49 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | en 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | com.juniorchina.$(PRODUCT_NAME:rfc1034identifier) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | APPL 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleSignature 20 | ???? 21 | CFBundleVersion 22 | 1 23 | LSRequiresIPhoneOS 24 | 25 | UILaunchStoryboardName 26 | LaunchScreen 27 | UIMainStoryboardFile 28 | Main 29 | UIRequiredDeviceCapabilities 30 | 31 | armv7 32 | 33 | UISupportedInterfaceOrientations 34 | 35 | UIInterfaceOrientationPortrait 36 | UIInterfaceOrientationLandscapeLeft 37 | UIInterfaceOrientationLandscapeRight 38 | 39 | 40 | 41 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel/Base.lproj/Main.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel/UICollectionViewLeftAlignedLayout/UICollectionViewLeftAlignedLayout.h: -------------------------------------------------------------------------------- 1 | 2 | // Copyright (c) 2014 Giovanni Lodi 3 | // 4 | // Permission is hereby granted, free of charge, to any person obtaining a copy of 5 | // this software and associated documentation files (the "Software"), to deal in 6 | // the Software without restriction, including without limitation the rights to 7 | // use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of 8 | // the Software, and to permit persons to whom the Software is furnished to do so, 9 | // subject to the following conditions: 10 | // 11 | // The above copyright notice and this permission notice shall be included in all 12 | // copies or substantial portions of the Software. 13 | // 14 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS 16 | // FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR 17 | // COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER 18 | // IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 19 | // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 20 | 21 | /** 22 | * Simple UICollectionViewFlowLayout that aligns the cells to the left rather than justify them 23 | * 24 | * Based on http://stackoverflow.com/questions/13017257/how-do-you-determine-spacing-between-cells-in-uicollectionview-flowlayout 25 | */ 26 | 27 | #import 28 | 29 | @interface UICollectionViewLeftAlignedLayout : UICollectionViewFlowLayout 30 | 31 | @end 32 | 33 | /** 34 | * Just a convenience protocol to keep things consistent. 35 | * Someone could find it confusing for a delegate object to conform to UICollectionViewDelegateFlowLayout 36 | * while using UICollectionViewLeftAlignedLayout. 37 | */ 38 | @protocol UICollectionViewDelegateLeftAlignedLayout 39 | 40 | @end 41 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel/AppDelegate.m: -------------------------------------------------------------------------------- 1 | // 2 | // AppDelegate.m 3 | // CollectionViewSubscriptionLabel 4 | // 5 | // Created by chenyk on 15/4/24. 6 | // Copyright (c) 2015年 chenyk. 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 | - (void)applicationWillResignActive:(UIApplication *)application { 24 | // 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. 25 | // Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game. 26 | } 27 | 28 | - (void)applicationDidEnterBackground:(UIApplication *)application { 29 | // 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. 30 | // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits. 31 | } 32 | 33 | - (void)applicationWillEnterForeground:(UIApplication *)application { 34 | // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background. 35 | } 36 | 37 | - (void)applicationDidBecomeActive:(UIApplication *)application { 38 | // 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. 39 | } 40 | 41 | - (void)applicationWillTerminate:(UIApplication *)application { 42 | // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:. 43 | } 44 | 45 | @end 46 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel/Base.lproj/LaunchScreen.xib: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 20 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel.xcodeproj/xcuserdata/chenyk.xcuserdatad/xcschemes/CollectionViewSubscriptionLabel.xcscheme: -------------------------------------------------------------------------------- 1 | 2 | 5 | 8 | 9 | 15 | 21 | 22 | 23 | 29 | 35 | 36 | 37 | 38 | 39 | 44 | 45 | 47 | 53 | 54 | 55 | 56 | 57 | 63 | 64 | 65 | 66 | 75 | 77 | 83 | 84 | 85 | 86 | 87 | 88 | 94 | 96 | 102 | 103 | 104 | 105 | 107 | 108 | 111 | 112 | 113 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel/UICollectionViewLeftAlignedLayout/UICollectionViewLeftAlignedLayout.m: -------------------------------------------------------------------------------- 1 | 2 | // Copyright (c) 2014 Giovanni Lodi 3 | // 4 | // Permission is hereby granted, free of charge, to any person obtaining a copy of 5 | // this software and associated documentation files (the "Software"), to deal in 6 | // the Software without restriction, including without limitation the rights to 7 | // use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of 8 | // the Software, and to permit persons to whom the Software is furnished to do so, 9 | // subject to the following conditions: 10 | // 11 | // The above copyright notice and this permission notice shall be included in all 12 | // copies or substantial portions of the Software. 13 | // 14 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS 16 | // FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR 17 | // COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER 18 | // IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 19 | // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 20 | 21 | #import "UICollectionViewLeftAlignedLayout.h" 22 | 23 | @interface UICollectionViewLayoutAttributes (LeftAligned) 24 | 25 | - (void)leftAlignFrameWithSectionInset:(UIEdgeInsets)sectionInset; 26 | 27 | @end 28 | 29 | @implementation UICollectionViewLayoutAttributes (LeftAligned) 30 | 31 | - (void)leftAlignFrameWithSectionInset:(UIEdgeInsets)sectionInset 32 | { 33 | CGRect frame = self.frame; 34 | frame.origin.x = sectionInset.left; 35 | self.frame = frame; 36 | } 37 | 38 | @end 39 | 40 | #pragma mark - 41 | 42 | @implementation UICollectionViewLeftAlignedLayout 43 | 44 | #pragma mark - UICollectionViewLayout 45 | 46 | - (NSArray *)layoutAttributesForElementsInRect:(CGRect)rect { 47 | NSArray* attributesToReturn = [super layoutAttributesForElementsInRect:rect]; 48 | for (UICollectionViewLayoutAttributes* attributes in attributesToReturn) { 49 | if (nil == attributes.representedElementKind) { 50 | NSIndexPath* indexPath = attributes.indexPath; 51 | attributes.frame = [self layoutAttributesForItemAtIndexPath:indexPath].frame; 52 | } 53 | } 54 | return attributesToReturn; 55 | } 56 | 57 | - (UICollectionViewLayoutAttributes *)layoutAttributesForItemAtIndexPath:(NSIndexPath *)indexPath { 58 | UICollectionViewLayoutAttributes* currentItemAttributes = [super layoutAttributesForItemAtIndexPath:indexPath]; 59 | UIEdgeInsets sectionInset = [self evaluatedSectionInsetForItemAtIndex:indexPath.section]; 60 | 61 | BOOL isFirstItemInSection = indexPath.item == 0; 62 | CGFloat layoutWidth = CGRectGetWidth(self.collectionView.frame) - sectionInset.left - sectionInset.right; 63 | 64 | if (isFirstItemInSection) { 65 | [currentItemAttributes leftAlignFrameWithSectionInset:sectionInset]; 66 | return currentItemAttributes; 67 | } 68 | 69 | NSIndexPath* previousIndexPath = [NSIndexPath indexPathForItem:indexPath.item-1 inSection:indexPath.section]; 70 | CGRect previousFrame = [self layoutAttributesForItemAtIndexPath:previousIndexPath].frame; 71 | CGFloat previousFrameRightPoint = previousFrame.origin.x + previousFrame.size.width; 72 | CGRect currentFrame = currentItemAttributes.frame; 73 | CGRect strecthedCurrentFrame = CGRectMake(sectionInset.left, 74 | currentFrame.origin.y, 75 | layoutWidth, 76 | currentFrame.size.height); 77 | // if the current frame, once left aligned to the left and stretched to the full collection view 78 | // widht intersects the previous frame then they are on the same line 79 | BOOL isFirstItemInRow = !CGRectIntersectsRect(previousFrame, strecthedCurrentFrame); 80 | 81 | if (isFirstItemInRow) { 82 | // make sure the first item on a line is left aligned 83 | [currentItemAttributes leftAlignFrameWithSectionInset:sectionInset]; 84 | return currentItemAttributes; 85 | } 86 | 87 | CGRect frame = currentItemAttributes.frame; 88 | frame.origin.x = previousFrameRightPoint + [self evaluatedMinimumInteritemSpacingForItemAtIndex:indexPath.row]; 89 | currentItemAttributes.frame = frame; 90 | return currentItemAttributes; 91 | } 92 | 93 | - (CGFloat)evaluatedMinimumInteritemSpacingForItemAtIndex:(NSInteger)index 94 | { 95 | if ([self.collectionView.delegate respondsToSelector:@selector(collectionView:layout:minimumInteritemSpacingForSectionAtIndex:)]) { 96 | id delegate = (id)self.collectionView.delegate; 97 | 98 | return [delegate collectionView:self.collectionView layout:self minimumInteritemSpacingForSectionAtIndex:index]; 99 | } else { 100 | return self.minimumInteritemSpacing; 101 | } 102 | } 103 | 104 | - (UIEdgeInsets)evaluatedSectionInsetForItemAtIndex:(NSInteger)index 105 | { 106 | if ([self.collectionView.delegate respondsToSelector:@selector(collectionView:layout:insetForSectionAtIndex:)]) { 107 | id delegate = (id)self.collectionView.delegate; 108 | 109 | return [delegate collectionView:self.collectionView layout:self insetForSectionAtIndex:index]; 110 | } else { 111 | return self.sectionInset; 112 | } 113 | } 114 | 115 | @end 116 | -------------------------------------------------------------------------------- /CollectionViewSubscriptionLabel/ViewController.m: -------------------------------------------------------------------------------- 1 | // 2 | // ViewController.m 3 | // CollectionViewSubscriptionLabel 4 | // 5 | // Created by chenyk on 15/4/24. 6 | // Copyright (c) 2015年 chenyk. All rights reserved. 7 | // 8 | 9 | #define kControllerHeaderViewHeight 90 10 | #define kControllerHeaderToCollectionViewMargin 0 11 | #define kCollectionViewCellsHorizonMargin 12 12 | #define kCollectionViewCellHeight 30 13 | #define kCollectionViewItemButtonImageToTextMargin 5 14 | 15 | #define kCollectionViewToLeftMargin 16 16 | #define kCollectionViewToTopMargin 12 17 | #define kCollectionViewToRightMargin 16 18 | #define kCollectionViewToBottomtMargin 10 19 | 20 | #define kCellImageToLabelMargin 10 21 | #define kCellBtnCenterToBorderMargin 19 22 | 23 | 24 | #import "ViewController.h" 25 | #import "UICollectionViewLeftAlignedLayout.h" 26 | #import "CollectionViewCell.h" 27 | #import "CollectionHeaderView.h" 28 | 29 | 30 | typedef void(^ISLimitWidth)(BOOL yesORNo,id data); 31 | 32 | 33 | static NSString * const kCellIdentifier = @"CellIdentifier"; 34 | static NSString * const kHeaderViewCellIdentifier = @"HeaderViewCellIdentifier"; 35 | 36 | @interface ViewController () 37 | 38 | @property (nonatomic, strong) UICollectionView *collectionView; 39 | @property (nonatomic, strong) NSMutableArray *dataSource; 40 | 41 | 42 | @end 43 | 44 | @implementation ViewController 45 | 46 | - (void)viewDidLoad { 47 | [super viewDidLoad]; 48 | // Do any additional setup after loading the view, typically from a nib. 49 | 50 | 51 | 52 | self.dataSource = [NSMutableArray array]; 53 | NSMutableArray * array1 = [@[@"推荐",@"热点",@"汽车",@"财经频道",@"热点",@"社会",@"明星八卦",@"IT科技",@"移动互联网",@"金融",@"大数据",@"股票期货",@"食品安全新闻",@"自定义标签"]mutableCopy]; 54 | 55 | [self.dataSource addObject:array1]; 56 | NSMutableArray * array2 = [@[@"推荐",@"热点",@"汽车",@"财经频道",@"热点",@"社会",@"明星八卦",@"IT科技",@"移动互联网",@"金融",@"大数据",@"股票期货",@"食品安全新闻食品食品安全"]mutableCopy]; 57 | 58 | [self.dataSource addObject:array2]; 59 | 60 | [self addCollectionView]; 61 | 62 | } 63 | 64 | - (void)addCollectionView { 65 | CGRect collectionViewFrame = CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height-40); 66 | UICollectionViewLeftAlignedLayout * layout = [[UICollectionViewLeftAlignedLayout alloc] init]; 67 | self.collectionView = [[UICollectionView alloc] initWithFrame:collectionViewFrame collectionViewLayout:layout]; 68 | self.collectionView.dataSource = self; 69 | self.collectionView.delegate = self; 70 | self.collectionView.backgroundColor = [UIColor whiteColor]; 71 | [self.collectionView registerClass:[CollectionViewCell class] forCellWithReuseIdentifier:kCellIdentifier]; 72 | self.collectionView.allowsMultipleSelection = YES; 73 | 74 | [self.collectionView registerClass:[CollectionHeaderView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:kHeaderViewCellIdentifier]; 75 | self.collectionView.showsHorizontalScrollIndicator = NO; 76 | self.collectionView.contentInset = UIEdgeInsetsMake(15, 0, 0, 0); 77 | self.collectionView.scrollsToTop = NO; 78 | //self.collectionView.scrollEnabled = NO; 79 | [self.view addSubview:self.collectionView]; 80 | 81 | } 82 | 83 | #pragma mark - UICollectionViewDataSource 84 | 85 | - (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView 86 | { 87 | return [self.dataSource count]; 88 | } 89 | 90 | - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section 91 | { 92 | NSMutableArray * array = self.dataSource[section]; 93 | return array.count; 94 | } 95 | 96 | - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath 97 | { 98 | CollectionViewCell *cell = (CollectionViewCell *)[collectionView dequeueReusableCellWithReuseIdentifier:kCellIdentifier forIndexPath:indexPath]; 99 | cell.titleLabel.frame = CGRectMake(0, 0, cell.frame.size.width, cell.frame.size.height); 100 | 101 | NSMutableArray * array = self.dataSource[indexPath.section]; 102 | 103 | NSString *text = array[indexPath.row]; 104 | //cell.titleLabel.backgroundColor = [UIColor orangeColor]; 105 | cell.titleLabel.text = text; 106 | 107 | return cell; 108 | } 109 | - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath 110 | { 111 | NSLog(@"%ld",indexPath.row); 112 | 113 | NSMutableArray * array1 = indexPath.section == 0?self.dataSource[1]:self.dataSource[0]; 114 | NSMutableArray * array2 = indexPath.section == 1?self.dataSource[1]:self.dataSource[0]; 115 | [array1 addObject:array2[indexPath.row]]; 116 | [array2 removeObjectAtIndex:indexPath.row]; 117 | 118 | [self.collectionView reloadData]; 119 | 120 | 121 | } 122 | 123 | - (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView 124 | viewForSupplementaryElementOfKind:(NSString *)kind 125 | atIndexPath:(NSIndexPath *)indexPath 126 | { 127 | if ([kind isEqual:UICollectionElementKindSectionHeader]) { 128 | CollectionHeaderView *headerView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:kHeaderViewCellIdentifier forIndexPath:indexPath]; 129 | NSString * str = indexPath.section == 0 ? @"我的订阅":@"未订阅"; 130 | headerView.titleLabel.text = str; 131 | return (UICollectionReusableView *)headerView; 132 | } 133 | return nil; 134 | } 135 | 136 | 137 | - (float)getCollectionCellWidthText:(NSString *)text{ 138 | float cellWidth; 139 | CGSize size = [text sizeWithAttributes: 140 | @{NSFontAttributeName: 141 | [UIFont systemFontOfSize:13]}]; 142 | 143 | cellWidth = ceilf(size.width) + kCellBtnCenterToBorderMargin; 144 | cellWidth = [self checkCellLimitWidth:cellWidth isLimitWidth:nil]; 145 | return cellWidth; 146 | } 147 | 148 | 149 | - (float)checkCellLimitWidth:(float)cellWidth isLimitWidth:(ISLimitWidth)isLimitWidth { 150 | float limitWidth = (CGRectGetWidth(self.collectionView.frame)-kCollectionViewToLeftMargin-kCollectionViewToRightMargin); 151 | if (cellWidth >= limitWidth) { 152 | cellWidth = limitWidth; 153 | isLimitWidth?isLimitWidth(YES,@(cellWidth)):nil; 154 | return cellWidth; 155 | } 156 | isLimitWidth?isLimitWidth(NO,@(cellWidth)):nil; 157 | return cellWidth; 158 | } 159 | 160 | #pragma mark - UICollectionViewDelegateLeftAlignedLayout 161 | 162 | - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath 163 | { 164 | // cell 的宽 165 | NSMutableArray * array = self.dataSource[indexPath.section]; 166 | NSString *text = array[indexPath.row]; 167 | float cellWidth = [self getCollectionCellWidthText:text]; 168 | return CGSizeMake(cellWidth, kCollectionViewCellHeight); 169 | } 170 | 171 | 172 | 173 | - (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section 174 | { 175 | return kCollectionViewCellsHorizonMargin;//cell之间的间隔 176 | } 177 | 178 | - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section 179 | { 180 | return CGSizeMake([UIScreen mainScreen].bounds.size.width - 50, 38); 181 | } 182 | 183 | - (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section 184 | { 185 | //四周边距 186 | return UIEdgeInsetsMake(kCollectionViewToTopMargin, kCollectionViewToLeftMargin, kCollectionViewToBottomtMargin, kCollectionViewToRightMargin); 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