├── LNCustomScrollView ├── LNCustomScrollView │ ├── Assets.xcassets │ │ ├── Contents.json │ │ ├── fulian.imageset │ │ │ ├── fulian-1.jpg │ │ │ ├── fulian-2.jpg │ │ │ ├── fulian.jpg │ │ │ └── Contents.json │ │ ├── AccentColor.colorset │ │ │ └── Contents.json │ │ └── AppIcon.appiconset │ │ │ └── Contents.json │ ├── Main │ │ ├── DemoItemObj.m │ │ ├── MainViewController.h │ │ ├── DemoItemCollectionViewCell.h │ │ ├── DemoItemObj.h │ │ ├── DemoItemCollectionViewCell.m │ │ └── MainViewController.m │ ├── AppDelegate.h │ ├── Demo │ │ ├── Momentum │ │ │ ├── LNMomentumObj.m │ │ │ ├── LNVelocityDynamicItem.m │ │ │ ├── LNVelocityDynamicItem.h │ │ │ ├── LNMomentumObj.h │ │ │ ├── LNMomentumImpulser.h │ │ │ ├── LNRestMomentumDetector.h │ │ │ ├── LNRestMomentumDetector.m │ │ │ └── LNMomentumImpulser.m │ │ ├── CustomScrollViewViewController.h │ │ ├── BouncesObservationViewController.h │ │ ├── BouncesOptimizationViewController.h │ │ ├── DecelerateObservationViewController.h │ │ ├── PanGestureObservationViewController.h │ │ ├── CommonCell │ │ │ ├── DemoCommonCell.h │ │ │ └── DemoCommonCell.m │ │ ├── BouncesOptimization │ │ │ ├── BouncesOptimizationDataList.h │ │ │ ├── BouncesOptimizationTrainer.h │ │ │ ├── BouncesOptimizationDataList.m │ │ │ └── BouncesOptimizationTrainer.m │ │ ├── MomentumTransmitViewController.h │ │ ├── CustomScrollViewViewController.m │ │ ├── DecelerateObservationViewController.m │ │ ├── BouncesObservationViewController.m │ │ ├── PanGestureObservationViewController.m │ │ ├── MomentumTransmitViewController.m │ │ └── BouncesOptimizationViewController.m │ ├── CustomScrollView │ │ ├── LNCustomScrollView.h │ │ ├── LNCustomScrollViewClockProxy.h │ │ ├── LNCustomScrollViewClock.h │ │ ├── LNCustomScrollViewClockProxy.m │ │ ├── LNCustomScrollViewClock.m │ │ └── LNCustomScrollView.m │ ├── main.m │ ├── AppDelegate.m │ ├── Base.lproj │ │ ├── Main.storyboard │ │ └── LaunchScreen.storyboard │ └── Info.plist ├── LNCustomScrollView.xcodeproj │ ├── project.xcworkspace │ │ ├── contents.xcworkspacedata │ │ └── xcshareddata │ │ │ └── IDEWorkspaceChecks.plist │ └── project.pbxproj ├── LNCustomScrollViewTests │ ├── Info.plist │ └── LNCustomScrollViewTests.m └── LNCustomScrollViewUITests │ ├── Info.plist │ └── LNCustomScrollViewUITests.m ├── README.md ├── LICENSE └── .gitignore /LNCustomScrollView/LNCustomScrollView/Assets.xcassets/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "info" : { 3 | "author" : "xcode", 4 | "version" : 1 5 | } 6 | } 7 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Assets.xcassets/fulian.imageset/fulian-1.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LevisonNN/LNCustomScrollView/HEAD/LNCustomScrollView/LNCustomScrollView/Assets.xcassets/fulian.imageset/fulian-1.jpg -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Assets.xcassets/fulian.imageset/fulian-2.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LevisonNN/LNCustomScrollView/HEAD/LNCustomScrollView/LNCustomScrollView/Assets.xcassets/fulian.imageset/fulian-2.jpg -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Assets.xcassets/fulian.imageset/fulian.jpg: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/LevisonNN/LNCustomScrollView/HEAD/LNCustomScrollView/LNCustomScrollView/Assets.xcassets/fulian.imageset/fulian.jpg -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Assets.xcassets/AccentColor.colorset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "colors" : [ 3 | { 4 | "idiom" : "universal" 5 | } 6 | ], 7 | "info" : { 8 | "author" : "xcode", 9 | "version" : 1 10 | } 11 | } 12 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Main/DemoItemObj.m: -------------------------------------------------------------------------------- 1 | // 2 | // DemoItemObj.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import "DemoItemObj.h" 10 | 11 | @implementation DemoItemObj 12 | 13 | @end 14 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/AppDelegate.h: -------------------------------------------------------------------------------- 1 | // 2 | // AppDelegate.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // 7 | 8 | #import 9 | 10 | @interface AppDelegate : UIResponder 11 | 12 | @property (nonatomic, strong) UIWindow *window; 13 | 14 | @end 15 | 16 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | IDEDidComputeMac32BitWarning 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/Momentum/LNMomentumObj.m: -------------------------------------------------------------------------------- 1 | // 2 | // LNMomentumObj.m 3 | // LNMomentumTransmitDemo 4 | // 5 | // Created by Levison on 2022/7/17. 6 | // 7 | 8 | #import "LNMomentumObj.h" 9 | 10 | @implementation LNMomentumObj 11 | 12 | - (float)momentumValue 13 | { 14 | return self.mass * self.velocityValue; 15 | } 16 | 17 | @end 18 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Main/MainViewController.h: -------------------------------------------------------------------------------- 1 | // 2 | // MainViewController.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | NS_ASSUME_NONNULL_BEGIN 12 | 13 | @interface MainViewController : UIViewController 14 | 15 | @end 16 | 17 | NS_ASSUME_NONNULL_END 18 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/CustomScrollViewViewController.h: -------------------------------------------------------------------------------- 1 | // 2 | // CustomScrollViewViewController.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | NS_ASSUME_NONNULL_BEGIN 12 | 13 | @interface CustomScrollViewViewController : UIViewController 14 | 15 | @end 16 | 17 | NS_ASSUME_NONNULL_END 18 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # LNCustomScrollView 2 | A ScrollView implemented with UIView. Not for production ,just for fun. And provides demos to coculate those dynamic parameters. 3 | #### [掘金地址](https://juejin.cn/post/6947552980090486814) 4 | #### 一个用于展示iOS的UIScrollView运动特性的Demo，包含了观察Decelerate、Bounces、PanGesture的Demo，一个用于优化Bounces参数的Demo，和最终做好的CustomScrollView。 5 | #### 没有使用动画库，例如：UIDynamic、POP、UIViewAnimation，只使用了一个UIView、一个PanGesture、一个CADisplayLink，运动数值均为计算得出。 6 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/BouncesObservationViewController.h: -------------------------------------------------------------------------------- 1 | // 2 | // BouncesObservationViewController.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | NS_ASSUME_NONNULL_BEGIN 12 | 13 | @interface BouncesObservationViewController : UIViewController 14 | 15 | @end 16 | 17 | NS_ASSUME_NONNULL_END 18 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/BouncesOptimizationViewController.h: -------------------------------------------------------------------------------- 1 | // 2 | // BouncesOptimizationViewController.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | NS_ASSUME_NONNULL_BEGIN 12 | 13 | @interface BouncesOptimizationViewController : UIViewController 14 | 15 | @end 16 | 17 | NS_ASSUME_NONNULL_END 18 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/DecelerateObservationViewController.h: -------------------------------------------------------------------------------- 1 | // 2 | // DecelerateObservationViewController.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | NS_ASSUME_NONNULL_BEGIN 12 | 13 | @interface DecelerateObservationViewController : UIViewController 14 | 15 | @end 16 | 17 | NS_ASSUME_NONNULL_END 18 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/PanGestureObservationViewController.h: -------------------------------------------------------------------------------- 1 | // 2 | // PanGestureObservationViewController.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | NS_ASSUME_NONNULL_BEGIN 12 | 13 | @interface PanGestureObservationViewController : UIViewController 14 | 15 | @end 16 | 17 | NS_ASSUME_NONNULL_END 18 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/Momentum/LNVelocityDynamicItem.m: -------------------------------------------------------------------------------- 1 | // 2 | // LNVelocityDynamicItem.m 3 | // LNMomentumTransmitDemo 4 | // 5 | // Created by Levison on 2022/7/17. 6 | // 7 | 8 | #import "LNVelocityDynamicItem.h" 9 | 10 | @implementation LNVelocityDynamicItem 11 | 12 | - (instancetype)init { 13 | self = [super init]; 14 | if (self) { 15 | _bounds = CGRectMake(0, 0, 1, 1); 16 | } 17 | return self; 18 | } 19 | 20 | 21 | @end 22 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/CustomScrollView/LNCustomScrollView.h: -------------------------------------------------------------------------------- 1 | // 2 | // LNCustomScrollView.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | NS_ASSUME_NONNULL_BEGIN 12 | 13 | @interface LNCustomScrollView : UIView 14 | 15 | @property (nonatomic, assign) CGSize contentSize; 16 | 17 | @property (nonatomic, assign) BOOL bounces; 18 | 19 | @end 20 | 21 | NS_ASSUME_NONNULL_END 22 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/CommonCell/DemoCommonCell.h: -------------------------------------------------------------------------------- 1 | // 2 | // DemoCommonCell.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | NS_ASSUME_NONNULL_BEGIN 12 | 13 | extern NSString * const kDemoCommonCell; 14 | 15 | @interface DemoCommonCell : UICollectionViewCell 16 | 17 | @property (nonatomic, strong, readonly) UILabel *titleLabel; 18 | 19 | @end 20 | 21 | NS_ASSUME_NONNULL_END 22 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Assets.xcassets/fulian.imageset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "filename" : "fulian.jpg", 5 | "idiom" : "universal", 6 | "scale" : "1x" 7 | }, 8 | { 9 | "filename" : "fulian-1.jpg", 10 | "idiom" : "universal", 11 | "scale" : "2x" 12 | }, 13 | { 14 | "filename" : "fulian-2.jpg", 15 | "idiom" : "universal", 16 | "scale" : "3x" 17 | } 18 | ], 19 | "info" : { 20 | "author" : "xcode", 21 | "version" : 1 22 | } 23 | } 24 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/main.m: -------------------------------------------------------------------------------- 1 | // 2 | // main.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // 7 | 8 | #import 9 | #import "AppDelegate.h" 10 | 11 | int main(int argc, char * argv[]) { 12 | NSString * appDelegateClassName; 13 | @autoreleasepool { 14 | // Setup code that might create autoreleased objects goes here. 15 | appDelegateClassName = NSStringFromClass([AppDelegate class]); 16 | } 17 | return UIApplicationMain(argc, argv, nil, appDelegateClassName); 18 | } 19 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Main/DemoItemCollectionViewCell.h: -------------------------------------------------------------------------------- 1 | // 2 | // DemoItemCollectionViewCell.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import 10 | #import "DemoItemObj.h" 11 | 12 | NS_ASSUME_NONNULL_BEGIN 13 | 14 | extern NSString *const kDemoItemCollectionViewCell; 15 | 16 | @interface DemoItemCollectionViewCell : UICollectionViewCell 17 | 18 | - (void)setItemObj:(DemoItemObj *)item; 19 | 20 | @end 21 | 22 | NS_ASSUME_NONNULL_END 23 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/Momentum/LNVelocityDynamicItem.h: -------------------------------------------------------------------------------- 1 | // 2 | // LNVelocityDynamicItem.h 3 | // LNMomentumTransmitDemo 4 | // 5 | // Created by Levison on 2022/7/17. 6 | // 7 | 8 | #import 9 | #import 10 | 11 | NS_ASSUME_NONNULL_BEGIN 12 | 13 | @interface LNVelocityDynamicItem : NSObject 14 | 15 | @property (nonatomic, readwrite) CGPoint center; 16 | @property (nonatomic, readonly) CGRect bounds; 17 | @property (nonatomic, readwrite) CGAffineTransform transform; 18 | 19 | @end 20 | 21 | NS_ASSUME_NONNULL_END 22 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/CustomScrollView/LNCustomScrollViewClockProxy.h: -------------------------------------------------------------------------------- 1 | // 2 | // LNCustomScrollViewClockProxy.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | NS_ASSUME_NONNULL_BEGIN 12 | 13 | @interface LNCustomScrollViewClockProxy : NSProxy 14 | 15 | @property (nullable, nonatomic, weak, readonly) id target; 16 | - (instancetype)initWithTarget:(id)target; 17 | + (instancetype)proxyWithTarget:(id)target; 18 | 19 | @end 20 | 21 | NS_ASSUME_NONNULL_END 22 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/BouncesOptimization/BouncesOptimizationDataList.h: -------------------------------------------------------------------------------- 1 | // 2 | // BouncesOptimizationDataList.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | NS_ASSUME_NONNULL_BEGIN 12 | 13 | @interface BouncesOptimizationData : NSObject 14 | 15 | @property (nonatomic, copy) NSString *title; 16 | 17 | @property (nonatomic, copy) NSArray *dataArray; 18 | 19 | @end 20 | 21 | @interface BouncesOptimizationDataList : NSObject 22 | 23 | @property (nonatomic, strong) NSMutableArray *dataMArray; 24 | 25 | @end 26 | 27 | NS_ASSUME_NONNULL_END 28 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Main/DemoItemObj.h: -------------------------------------------------------------------------------- 1 | // 2 | // DemoItemObj.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | NS_ASSUME_NONNULL_BEGIN 12 | 13 | typedef NS_ENUM(NSInteger, DemoType) 14 | { 15 | DemoTypeDecelerateObservation, 16 | DemoTypeBouncesObservation, 17 | DemoTypePanGestureObservation, 18 | DemoTypeOptimization, 19 | DemoTypeCustomScrollView, 20 | DemoTypeMomentumTransmit, 21 | }; 22 | 23 | @interface DemoItemObj : NSObject 24 | 25 | @property (nonatomic, assign) DemoType type; 26 | 27 | @property (nonatomic, copy) NSString *title; 28 | 29 | @end 30 | 31 | NS_ASSUME_NONNULL_END 32 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/MomentumTransmitViewController.h: -------------------------------------------------------------------------------- 1 | // 2 | // MomentumTransmitViewController.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 17.7.22. 6 | // Copyright © 2022 Levison. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | NS_ASSUME_NONNULL_BEGIN 12 | 13 | //横向的UICollectionView（v1）的右侧和纵向UICollectionView（v2）的顶部进行了连接 14 | //v1的向右的剩余速度会转成v2向下的剩余速度。反之，v2的向上剩余速度会转成v1向左的剩余速度。 15 | //如果你需要两个纵向的列表v1嵌套v2，只做单向的就可以，将v1撞击底部的剩余速度转成v2向下的剩余速度 16 | //因为视图方向不一致，所以需要serializer过滤器将不同方向的速度转换一下。 17 | //我们强制加上的效果优先级总是最低的任何用户操作/函数调用都会让这个失效，所以不用担心它对其他效果造成影响。 18 | //它要求UIScrollView的bounces=NO，因为一份能量不能转化为两份（被bounces里的阻尼消耗+传递给其他视图）。 19 | 20 | 21 | @interface MomentumTransmitViewController : UIViewController 22 | 23 | @end 24 | 25 | NS_ASSUME_NONNULL_END 26 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/CustomScrollView/LNCustomScrollViewClock.h: -------------------------------------------------------------------------------- 1 | // 2 | // LNCustomScrollViewClock.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | NS_ASSUME_NONNULL_BEGIN 12 | 13 | @protocol LNCustomScrollViewClockProtocol 14 | 15 | - (void)customScrollViewClockUpdateTimeInterval:(NSTimeInterval)time; 16 | 17 | @end 18 | 19 | @interface LNCustomScrollViewClock : NSObject 20 | 21 | + (instancetype)shareInstance; 22 | 23 | - (void)addObject:(id )obj; 24 | 25 | @property (nonatomic, assign, readonly) BOOL isPaused; 26 | 27 | - (void)startOrResume; 28 | - (void)pause; 29 | - (void)stop; 30 | 31 | @end 32 | 33 | NS_ASSUME_NONNULL_END 34 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/Momentum/LNMomentumObj.h: -------------------------------------------------------------------------------- 1 | // 2 | // LNMomentumObj.h 3 | // LNMomentumTransmitDemo 4 | // 5 | // Created by Levison on 2022/7/17. 6 | // 7 | 8 | #import 9 | 10 | NS_ASSUME_NONNULL_BEGIN 11 | 12 | //只有上下左右，其他方向可以用CGPoint改成单位向量表示 13 | typedef NS_ENUM(NSInteger, LNMomentumDirection) 14 | { 15 | LNMomentumDirectionLeft, 16 | LNMomentumDirectionRight, 17 | LNMomentumDirectionTop, 18 | LNMomentumDirectionBottom 19 | }; 20 | 21 | @interface LNMomentumObj : NSObject 22 | 23 | @property (nonatomic, assign) float velocityValue; 24 | 25 | @property (nonatomic, assign) float mass; 26 | 27 | @property (nonatomic, assign, readonly) float momentumValue; 28 | 29 | @property (nonatomic, assign) LNMomentumDirection direction; 30 | 31 | 32 | @end 33 | 34 | NS_ASSUME_NONNULL_END 35 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollViewTests/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | $(DEVELOPMENT_LANGUAGE) 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | $(PRODUCT_BUNDLE_PACKAGE_TYPE) 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleVersion 20 | 1 21 | 22 | 23 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollViewUITests/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | $(DEVELOPMENT_LANGUAGE) 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | $(PRODUCT_BUNDLE_PACKAGE_TYPE) 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleVersion 20 | 1 21 | 22 | 23 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollViewTests/LNCustomScrollViewTests.m: -------------------------------------------------------------------------------- 1 | // 2 | // LNCustomScrollViewTests.m 3 | // LNCustomScrollViewTests 4 | // 5 | // Created by Levison on 5.4.21. 6 | // 7 | 8 | #import 9 | 10 | @interface LNCustomScrollViewTests : XCTestCase 11 | 12 | @end 13 | 14 | @implementation LNCustomScrollViewTests 15 | 16 | - (void)setUp { 17 | // Put setup code here. This method is called before the invocation of each test method in the class. 18 | } 19 | 20 | - (void)tearDown { 21 | // Put teardown code here. This method is called after the invocation of each test method in the class. 22 | } 23 | 24 | - (void)testExample { 25 | // This is an example of a functional test case. 26 | // Use XCTAssert and related functions to verify your tests produce the correct results. 27 | } 28 | 29 | - (void)testPerformanceExample { 30 | // This is an example of a performance test case. 31 | [self measureBlock:^{ 32 | // Put the code you want to measure the time of here. 33 | }]; 34 | } 35 | 36 | @end 37 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2021 LevisonNN 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 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/AppDelegate.m: -------------------------------------------------------------------------------- 1 | // 2 | // AppDelegate.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // 7 | 8 | #import "AppDelegate.h" 9 | #import "MainViewController.h" 10 | #import "LNCustomScrollViewClock.h" 11 | 12 | 13 | @interface AppDelegate () 14 | 15 | @end 16 | 17 | @implementation AppDelegate 18 | 19 | 20 | - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 21 | 22 | [[LNCustomScrollViewClock shareInstance] startOrResume]; 23 | 24 | _window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds]; 25 | _window.backgroundColor = [UIColor whiteColor]; 26 | MainViewController *mainController = [[MainViewController alloc] init]; 27 | UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:mainController]; 28 | nav.navigationBar.translucent = NO; 29 | _window.rootViewController = nav; 30 | [_window makeKeyAndVisible]; 31 | 32 | // Override point for customization after application launch. 33 | return YES; 34 | } 35 | 36 | 37 | @end 38 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/Momentum/LNMomentumImpulser.h: -------------------------------------------------------------------------------- 1 | // 2 | // LNMomentumImpulser.h 3 | // LNMomentumTransmitDemo 4 | // 5 | // Created by Levison on 2022/7/17. 6 | // 7 | 8 | #import 9 | #import "LNMomentumObj.h" 10 | #import 11 | #import "LNRestMomentumDetector.h" 12 | 13 | NS_ASSUME_NONNULL_BEGIN 14 | 15 | @class LNMomentumImpulser; 16 | 17 | @protocol LNMomentumImpulserSerializer 18 | 19 | @optional 20 | - (BOOL)impulser:(LNMomentumImpulser *)impulser shouldReactToMomentum:(LNMomentumObj *)momentum; 21 | - (LNMomentumObj *)impulser:(LNMomentumImpulser *)impulser momentumForOriginalMomentum:(LNMomentumObj *)obj; 22 | 23 | @end 24 | 25 | @interface LNMomentumImpulser : NSObject 26 | 27 | @property (nonatomic, assign) CGFloat mass; 28 | 29 | @property (nonatomic, weak, readonly) UIScrollView *targetScrollView; 30 | 31 | @property (nonatomic, weak) id serializer; 32 | 33 | - (instancetype)initWithTargetScrollView:(UIScrollView *)targetScrollView; 34 | - (void)removeCurrentMomentum; 35 | 36 | @end 37 | 38 | NS_ASSUME_NONNULL_END 39 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/CommonCell/DemoCommonCell.m: -------------------------------------------------------------------------------- 1 | // 2 | // DemoCommonCell.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import "DemoCommonCell.h" 10 | 11 | NSString * const kDemoCommonCell = @"kDemoCommonCell"; 12 | 13 | @interface DemoCommonCell () 14 | 15 | @property (nonatomic, strong) UILabel *titleLabel; 16 | 17 | @end 18 | 19 | @implementation DemoCommonCell 20 | 21 | - (instancetype)initWithFrame:(CGRect)frame 22 | { 23 | self = [super initWithFrame:frame]; 24 | if (self) { 25 | [self addSubviews]; 26 | [self addConstraints]; 27 | self.contentView.backgroundColor = [UIColor colorWithRed:(rand()%255)/255.f green:(rand()%255)/255.f blue:(rand()%255)/255.f alpha:(rand()%255)/255.f]; 28 | } 29 | return self; 30 | } 31 | 32 | - (void)addSubviews 33 | { 34 | [self.contentView addSubview:self.titleLabel]; 35 | } 36 | 37 | - (void)addConstraints 38 | { 39 | self.titleLabel.frame = self.contentView.frame; 40 | } 41 | 42 | - (UILabel *)titleLabel 43 | { 44 | if (!_titleLabel) { 45 | _titleLabel = [[UILabel alloc] init]; 46 | _titleLabel.textColor = [UIColor blackColor]; 47 | _titleLabel.textAlignment = NSTextAlignmentCenter; 48 | } 49 | return _titleLabel; 50 | } 51 | 52 | @end 53 | 54 | 55 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/Momentum/LNRestMomentumDetector.h: -------------------------------------------------------------------------------- 1 | // 2 | // LNRestMomentumDetector.h 3 | // LNMomentumTransmitDemo 4 | // 5 | // Created by Levison on 2022/7/17. 6 | // 7 | 8 | #import 9 | #import 10 | #import "LNMomentumObj.h" 11 | 12 | NS_ASSUME_NONNULL_BEGIN 13 | 14 | typedef NS_ENUM(NSInteger, LNMomentumEffectDirection) 15 | { 16 | LNMomentumEffectDirectionVertical, 17 | LNMomentumEffectDirectionHorizontal 18 | }; 19 | 20 | @class LNRestMomentumDetector; 21 | 22 | 23 | @protocol LNRestMomentumDelegate 24 | @required 25 | - (void)detectorDidReleaseMomentum:(LNMomentumObj *)momentum; 26 | 27 | @end 28 | 29 | @protocol LNRestMomentumSerializer 30 | 31 | @optional 32 | - (BOOL)detector:(LNRestMomentumDetector *)detector shouldStashMomentum:(LNMomentumObj *)momentum; 33 | - (BOOL)detector:(LNRestMomentumDetector *)detector shouldReleaseMomentum:(LNMomentumObj *)momentum; 34 | 35 | @end 36 | 37 | @interface LNRestMomentumDetector : NSObject 38 | 39 | @property (nonatomic, assign) CGFloat mass; 40 | 41 | @property (nonatomic, assign) LNMomentumEffectDirection effectDirection; 42 | 43 | @property (nonatomic, weak) id< LNRestMomentumDelegate> delegate; 44 | @property (nonatomic, weak) id< LNRestMomentumSerializer> serializer; 45 | 46 | @end 47 | 48 | NS_ASSUME_NONNULL_END 49 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/BouncesOptimization/BouncesOptimizationTrainer.h: -------------------------------------------------------------------------------- 1 | // 2 | // BouncesOptimizationTrainer.h 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import 10 | 11 | NS_ASSUME_NONNULL_BEGIN 12 | 13 | typedef NS_ENUM(NSInteger, LNBouncesOptimizationTrainerStatus) 14 | { 15 | LNBouncesOptimizationTrainerStatusFree, 16 | LNBouncesOptimizationTrainerStatusTraining 17 | }; 18 | 19 | @interface LNBouncesOptimizationTrainerResult : NSObject 20 | 21 | @property (nonatomic, assign) float phi; 22 | 23 | @property (nonatomic, assign) float delta; 24 | 25 | @property (nonatomic, assign) float a; 26 | 27 | @property (nonatomic, assign) float currentBias; 28 | 29 | @end 30 | 31 | @protocol LNBouncesOptimizationTrainerDelegate 32 | @optional 33 | - (void)trainerDidUpdate:(LNBouncesOptimizationTrainerResult *)tempResult; 34 | - (void)trainerDidFinish:(LNBouncesOptimizationTrainerResult *)finalResult; 35 | 36 | - (void)trainerDidInterrupted; 37 | 38 | @end 39 | 40 | @interface LNBouncesOptimizationTrainer : NSObject 41 | 42 | @property (atomic, assign, readonly) LNBouncesOptimizationTrainerStatus status; 43 | 44 | @property (nonatomic, weak) NSObject *delegate; 45 | 46 | - (void)setObservationData:(NSArray *)observationArr; 47 | 48 | - (void)startTraining; 49 | - (void)stopTraining; 50 | 51 | @end 52 | 53 | 54 | NS_ASSUME_NONNULL_END 55 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollViewUITests/LNCustomScrollViewUITests.m: -------------------------------------------------------------------------------- 1 | // 2 | // LNCustomScrollViewUITests.m 3 | // LNCustomScrollViewUITests 4 | // 5 | // Created by Levison on 5.4.21. 6 | // 7 | 8 | #import 9 | 10 | @interface LNCustomScrollViewUITests : XCTestCase 11 | 12 | @end 13 | 14 | @implementation LNCustomScrollViewUITests 15 | 16 | - (void)setUp { 17 | // Put setup code here. This method is called before the invocation of each test method in the class. 18 | 19 | // In UI tests it is usually best to stop immediately when a failure occurs. 20 | self.continueAfterFailure = NO; 21 | 22 | // In UI tests it’s important to set the initial state - such as interface orientation - required for your tests before they run. The setUp method is a good place to do this. 23 | } 24 | 25 | - (void)tearDown { 26 | // Put teardown code here. This method is called after the invocation of each test method in the class. 27 | } 28 | 29 | - (void)testExample { 30 | // UI tests must launch the application that they test. 31 | XCUIApplication *app = [[XCUIApplication alloc] init]; 32 | [app launch]; 33 | 34 | // Use recording to get started writing UI tests. 35 | // Use XCTAssert and related functions to verify your tests produce the correct results. 36 | } 37 | 38 | - (void)testLaunchPerformance { 39 | if (@available(macOS 10.15, iOS 13.0, tvOS 13.0, *)) { 40 | // This measures how long it takes to launch your application. 41 | [self measureWithMetrics:@[[[XCTApplicationLaunchMetric alloc] init]] block:^{ 42 | [[[XCUIApplication alloc] init] launch]; 43 | }]; 44 | } 45 | } 46 | 47 | @end 48 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Main/DemoItemCollectionViewCell.m: -------------------------------------------------------------------------------- 1 | // 2 | // DemoItemCollectionViewCell.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import "DemoItemCollectionViewCell.h" 10 | 11 | NSString *const kDemoItemCollectionViewCell = @"kDemoItemCollectionViewCell"; 12 | 13 | @interface DemoItemCollectionViewCell () 14 | 15 | @property (nonatomic, strong) UILabel *titleLabel; 16 | 17 | @property (nonatomic, strong) DemoItemObj *itemObj; 18 | 19 | @end 20 | 21 | @implementation DemoItemCollectionViewCell 22 | 23 | - (instancetype)initWithFrame:(CGRect)frame 24 | { 25 | self = [super initWithFrame:frame]; 26 | if (self) { 27 | [self addSubviews]; 28 | [self addConstraints]; 29 | } 30 | return self; 31 | } 32 | 33 | - (void)setItemObj:(DemoItemObj *)item 34 | { 35 | _itemObj = item; 36 | self.titleLabel.text = item.title; 37 | self.contentView.backgroundColor = [UIColor colorWithRed:(rand()%255)/255.f green:(rand()%255)/255.f blue:(rand()%255)/255.f alpha:(rand()%255)/255.f]; 38 | } 39 | 40 | - (void)addSubviews 41 | { 42 | [self.contentView addSubview:self.titleLabel]; 43 | } 44 | 45 | - (void)addConstraints 46 | { 47 | self.titleLabel .frame = self.contentView.frame; 48 | } 49 | 50 | - (void)layoutSubviews 51 | { 52 | [super layoutSubviews]; 53 | [self addConstraints]; 54 | } 55 | 56 | - (UILabel *)titleLabel 57 | { 58 | if (!_titleLabel) { 59 | _titleLabel = [[UILabel alloc] init]; 60 | _titleLabel.textAlignment = NSTextAlignmentCenter; 61 | } 62 | return _titleLabel; 63 | } 64 | 65 | @end 66 | 67 | 68 | 69 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/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 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Base.lproj/LaunchScreen.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 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | $(DEVELOPMENT_LANGUAGE) 7 | CFBundleDisplayName 8 | LNCustomScrollView 9 | CFBundleExecutable 10 | $(EXECUTABLE_NAME) 11 | CFBundleIdentifier 12 | $(PRODUCT_BUNDLE_IDENTIFIER) 13 | CFBundleInfoDictionaryVersion 14 | 6.0 15 | CFBundleName 16 | $(PRODUCT_NAME) 17 | CFBundlePackageType 18 | $(PRODUCT_BUNDLE_PACKAGE_TYPE) 19 | CFBundleShortVersionString 20 | 1.0 21 | CFBundleVersion 22 | 1 23 | LSRequiresIPhoneOS 24 | 25 | UIApplicationSupportsIndirectInputEvents 26 | 27 | UILaunchStoryboardName 28 | LaunchScreen 29 | UIMainStoryboardFile 30 | Main 31 | UIRequiredDeviceCapabilities 32 | 33 | armv7 34 | 35 | UISupportedInterfaceOrientations 36 | 37 | UIInterfaceOrientationPortrait 38 | UIInterfaceOrientationLandscapeLeft 39 | UIInterfaceOrientationLandscapeRight 40 | 41 | UISupportedInterfaceOrientations~ipad 42 | 43 | UIInterfaceOrientationPortrait 44 | UIInterfaceOrientationPortraitUpsideDown 45 | UIInterfaceOrientationLandscapeLeft 46 | UIInterfaceOrientationLandscapeRight 47 | 48 | 49 | 50 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/CustomScrollView/LNCustomScrollViewClockProxy.m: -------------------------------------------------------------------------------- 1 | // 2 | // LNCustomScrollViewClockProxy.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import "LNCustomScrollViewClockProxy.h" 10 | 11 | @implementation LNCustomScrollViewClockProxy 12 | 13 | - (instancetype)initWithTarget:(id)target { 14 | _target = target; 15 | return self; 16 | } 17 | 18 | + (instancetype)proxyWithTarget:(id)target { 19 | return [[LNCustomScrollViewClockProxy alloc] initWithTarget:target]; 20 | } 21 | 22 | - (id)forwardingTargetForSelector:(SEL)selector { 23 | return _target; 24 | } 25 | 26 | - (void)forwardInvocation:(NSInvocation *)invocation { 27 | void *null = NULL; 28 | [invocation setReturnValue:&null]; 29 | } 30 | 31 | - (NSMethodSignature *)methodSignatureForSelector:(SEL)selector { 32 | return [NSObject instanceMethodSignatureForSelector:@selector(init)]; 33 | } 34 | 35 | - (BOOL)respondsToSelector:(SEL)aSelector { 36 | return [_target respondsToSelector:aSelector]; 37 | } 38 | 39 | - (BOOL)isEqual:(id)object { 40 | return [_target isEqual:object]; 41 | } 42 | 43 | - (NSUInteger)hash { 44 | return [_target hash]; 45 | } 46 | 47 | - (Class)superclass { 48 | return [_target superclass]; 49 | } 50 | 51 | - (Class)class { 52 | return [_target class]; 53 | } 54 | 55 | - (BOOL)isKindOfClass:(Class)aClass { 56 | return [_target isKindOfClass:aClass]; 57 | } 58 | 59 | - (BOOL)isMemberOfClass:(Class)aClass { 60 | return [_target isMemberOfClass:aClass]; 61 | } 62 | 63 | - (BOOL)conformsToProtocol:(Protocol *)aProtocol { 64 | return [_target conformsToProtocol:aProtocol]; 65 | } 66 | 67 | - (BOOL)isProxy { 68 | return YES; 69 | } 70 | 71 | - (NSString *)description { 72 | return [_target description]; 73 | } 74 | 75 | - (NSString *)debugDescription { 76 | return [_target debugDescription]; 77 | } 78 | 79 | @end 80 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Xcode 2 | # 3 | # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore 4 | 5 | ## User settings 6 | xcuserdata/ 7 | 8 | .DS_Store 9 | */.DS_Store 10 | 11 | ## compatibility with Xcode 8 and earlier (ignoring not required starting Xcode 9) 12 | *.xcscmblueprint 13 | *.xccheckout 14 | 15 | ## compatibility with Xcode 3 and earlier (ignoring not required starting Xcode 4) 16 | build/ 17 | DerivedData/ 18 | *.moved-aside 19 | *.pbxuser 20 | !default.pbxuser 21 | *.mode1v3 22 | !default.mode1v3 23 | *.mode2v3 24 | !default.mode2v3 25 | *.perspectivev3 26 | !default.perspectivev3 27 | 28 | ## Obj-C/Swift specific 29 | *.hmap 30 | 31 | ## App packaging 32 | *.ipa 33 | *.dSYM.zip 34 | *.dSYM 35 | 36 | # CocoaPods 37 | # 38 | # We recommend against adding the Pods directory to your .gitignore. However 39 | # you should judge for yourself, the pros and cons are mentioned at: 40 | # https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control 41 | # 42 | # Pods/ 43 | # 44 | # Add this line if you want to avoid checking in source code from the Xcode workspace 45 | # *.xcworkspace 46 | 47 | # Carthage 48 | # 49 | # Add this line if you want to avoid checking in source code from Carthage dependencies. 50 | # Carthage/Checkouts 51 | 52 | Carthage/Build/ 53 | 54 | # fastlane 55 | # 56 | # It is recommended to not store the screenshots in the git repo. 57 | # Instead, use fastlane to re-generate the screenshots whenever they are needed. 58 | # For more information about the recommended setup visit: 59 | # https://docs.fastlane.tools/best-practices/source-control/#source-control 60 | 61 | fastlane/report.xml 62 | fastlane/Preview.html 63 | fastlane/screenshots/**/*.png 64 | fastlane/test_output 65 | 66 | # Code Injection 67 | # 68 | # After new code Injection tools there's a generated folder /iOSInjectionProject 69 | # https://github.com/johnno1962/injectionforxcode 70 | 71 | iOSInjectionProject/ 72 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/CustomScrollViewViewController.m: -------------------------------------------------------------------------------- 1 | // 2 | // CustomScrollViewViewController.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import "CustomScrollViewViewController.h" 10 | #import "LNCustomScrollView.h" 11 | 12 | @interface CustomScrollViewViewController () 13 | 14 | @property (nonatomic, strong) LNCustomScrollView *customScrollView; 15 | 16 | @property (nonatomic, strong) UIImageView *imageView; 17 | 18 | @end 19 | 20 | @implementation CustomScrollViewViewController 21 | 22 | - (void)viewDidLoad { 23 | [super viewDidLoad]; 24 | [self addSubviews]; 25 | [self addConstraints]; 26 | 27 | //self.navigationController.navigationBar.hidden = YES; 28 | } 29 | 30 | - (void)addSubviews 31 | { 32 | [self.view addSubview:self.customScrollView]; 33 | [self.customScrollView addSubview:self.imageView]; 34 | } 35 | 36 | - (void)addConstraints 37 | { 38 | self.customScrollView.frame = self.view.bounds; 39 | 40 | UIImage *image = [UIImage imageNamed:@"fulian"]; 41 | CGFloat imageHeight = self.view.bounds.size.height; 42 | CGFloat imageWidth = imageHeight * (image.size.width/image.size.height); 43 | self.imageView.frame = CGRectMake(0.f, 0.f, imageWidth, imageHeight); 44 | self.imageView.image = image; 45 | self.customScrollView.contentSize = CGSizeMake(imageWidth, imageHeight); 46 | 47 | self.customScrollView.bounces = YES; 48 | } 49 | 50 | - (LNCustomScrollView *)customScrollView 51 | { 52 | if (!_customScrollView) { 53 | _customScrollView = [[LNCustomScrollView alloc] init]; 54 | } 55 | return _customScrollView; 56 | } 57 | 58 | - (UIImageView *)imageView 59 | { 60 | if (!_imageView) { 61 | _imageView = [[UIImageView alloc] init]; 62 | _imageView.contentMode = UIViewContentModeScaleAspectFill; 63 | _imageView.layer.masksToBounds = YES; 64 | } 65 | return _imageView; 66 | } 67 | 68 | @end 69 | 70 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Assets.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "iphone", 5 | "scale" : "2x", 6 | "size" : "20x20" 7 | }, 8 | { 9 | "idiom" : "iphone", 10 | "scale" : "3x", 11 | "size" : "20x20" 12 | }, 13 | { 14 | "idiom" : "iphone", 15 | "scale" : "2x", 16 | "size" : "29x29" 17 | }, 18 | { 19 | "idiom" : "iphone", 20 | "scale" : "3x", 21 | "size" : "29x29" 22 | }, 23 | { 24 | "idiom" : "iphone", 25 | "scale" : "2x", 26 | "size" : "40x40" 27 | }, 28 | { 29 | "idiom" : "iphone", 30 | "scale" : "3x", 31 | "size" : "40x40" 32 | }, 33 | { 34 | "idiom" : "iphone", 35 | "scale" : "2x", 36 | "size" : "60x60" 37 | }, 38 | { 39 | "idiom" : "iphone", 40 | "scale" : "3x", 41 | "size" : "60x60" 42 | }, 43 | { 44 | "idiom" : "ipad", 45 | "scale" : "1x", 46 | "size" : "20x20" 47 | }, 48 | { 49 | "idiom" : "ipad", 50 | "scale" : "2x", 51 | "size" : "20x20" 52 | }, 53 | { 54 | "idiom" : "ipad", 55 | "scale" : "1x", 56 | "size" : "29x29" 57 | }, 58 | { 59 | "idiom" : "ipad", 60 | "scale" : "2x", 61 | "size" : "29x29" 62 | }, 63 | { 64 | "idiom" : "ipad", 65 | "scale" : "1x", 66 | "size" : "40x40" 67 | }, 68 | { 69 | "idiom" : "ipad", 70 | "scale" : "2x", 71 | "size" : "40x40" 72 | }, 73 | { 74 | "idiom" : "ipad", 75 | "scale" : "1x", 76 | "size" : "76x76" 77 | }, 78 | { 79 | "idiom" : "ipad", 80 | "scale" : "2x", 81 | "size" : "76x76" 82 | }, 83 | { 84 | "idiom" : "ipad", 85 | "scale" : "2x", 86 | "size" : "83.5x83.5" 87 | }, 88 | { 89 | "idiom" : "ios-marketing", 90 | "scale" : "1x", 91 | "size" : "1024x1024" 92 | } 93 | ], 94 | "info" : { 95 | "author" : "xcode", 96 | "version" : 1 97 | } 98 | } 99 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/DecelerateObservationViewController.m: -------------------------------------------------------------------------------- 1 | // 2 | // DecelerateObservationViewController.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import "DecelerateObservationViewController.h" 10 | #import "DemoCommonCell.h" 11 | 12 | @interface DecelerateObservationViewController () 13 | < 14 | UICollectionViewDelegate, 15 | UICollectionViewDataSource, 16 | UICollectionViewDelegateFlowLayout 17 | > 18 | 19 | @property (nonatomic, strong) UICollectionView *collectionView; 20 | 21 | @property (nonatomic, strong) UICollectionViewFlowLayout *flowLayout; 22 | 23 | 24 | @end 25 | 26 | @implementation DecelerateObservationViewController 27 | 28 | - (void)viewDidLoad { 29 | [super viewDidLoad]; 30 | [self addSubviews]; 31 | [self addConstraints]; 32 | self.view.backgroundColor = [UIColor whiteColor]; 33 | } 34 | 35 | - (void)addSubviews 36 | { 37 | [self.view addSubview:self.collectionView]; 38 | } 39 | 40 | - (void)addConstraints 41 | { 42 | self.collectionView.frame = self.view.bounds; 43 | } 44 | 45 | - (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView 46 | { 47 | return 1; 48 | } 49 | 50 | - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section 51 | { 52 | return 1000; 53 | } 54 | 55 | - (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath 56 | { 57 | DemoCommonCell *decelerateCell = [self.collectionView dequeueReusableCellWithReuseIdentifier:kDemoCommonCell forIndexPath:indexPath]; 58 | return decelerateCell; 59 | } 60 | 61 | - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath 62 | { 63 | return CGSizeMake(88.f, 88.f); 64 | } 65 | 66 | - (UICollectionView *)collectionView 67 | { 68 | if (!_collectionView) { 69 | _collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:self.flowLayout]; 70 | _collectionView.backgroundColor = [UIColor whiteColor]; 71 | _collectionView.delegate = self; 72 | _collectionView.dataSource = self; 73 | [_collectionView registerClass:DemoCommonCell.class forCellWithReuseIdentifier:kDemoCommonCell]; 74 | } 75 | return _collectionView; 76 | } 77 | 78 | - (UICollectionViewFlowLayout *)flowLayout 79 | { 80 | if (!_flowLayout) { 81 | _flowLayout = [[UICollectionViewFlowLayout alloc] init]; 82 | _flowLayout.scrollDirection = UICollectionViewScrollDirectionVertical; 83 | } 84 | return _flowLayout; 85 | } 86 | 87 | - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset 88 | { 89 | NSLog(@"DecelerateVelocity:%lf", velocity.y); 90 | NSLog(@"DecelerateDistance:%lf", targetContentOffset->y - scrollView.contentOffset.y); 91 | } 92 | 93 | @end 94 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/Momentum/LNRestMomentumDetector.m: -------------------------------------------------------------------------------- 1 | // 2 | // LNRestMomentumDetector.m 3 | // LNMomentumTransmitDemo 4 | // 5 | // Created by Levison on 2022/7/17. 6 | // 7 | 8 | #import "LNRestMomentumDetector.h" 9 | 10 | @interface LNRestMomentumDetector () 11 | 12 | @property (nonatomic, strong) LNMomentumObj *stashedMomentum; 13 | 14 | @end 15 | 16 | @implementation LNRestMomentumDetector 17 | 18 | - (instancetype)init 19 | { 20 | self = [super init]; 21 | if (self) { 22 | self.mass = 1; 23 | } 24 | return self; 25 | } 26 | 27 | - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset 28 | { 29 | if (self.effectDirection == LNMomentumEffectDirectionHorizontal) { 30 | CGFloat targetOffset = scrollView.contentOffset.x + (velocity.x * 1000.f - 13.f)/2.f; 31 | if (fabs(targetOffset - targetContentOffset->x) > 13.f) { 32 | CGFloat v = fabs(targetOffset - targetContentOffset->x)*2 + 13.f; 33 | LNMomentumObj *stashedMomentum = [[LNMomentumObj alloc] init]; 34 | stashedMomentum.velocityValue = v; 35 | stashedMomentum.mass = self.mass; 36 | stashedMomentum.direction = velocity.x > 0?LNMomentumDirectionRight:LNMomentumDirectionLeft; 37 | self.stashedMomentum = stashedMomentum; 38 | } 39 | } else { 40 | CGFloat targetOffset = scrollView.contentOffset.y + (velocity.y * 1000.f - 13.f)/2.f; 41 | if (fabs(targetOffset - targetContentOffset->y) > 13.f) { 42 | CGFloat v = fabs(targetOffset - targetContentOffset->y)*2 + 13.f; 43 | LNMomentumObj *stashedMomentum = [[LNMomentumObj alloc] init]; 44 | stashedMomentum.velocityValue = v; 45 | stashedMomentum.mass = self.mass; 46 | stashedMomentum.direction = velocity.y > 0?LNMomentumDirectionBottom:LNMomentumDirectionTop; 47 | self.stashedMomentum = stashedMomentum; 48 | } 49 | } 50 | } 51 | 52 | - (void)setStashedMomentum:(LNMomentumObj *)stashedMomentum 53 | { 54 | if (self.serializer && [self.serializer respondsToSelector:@selector(detector:shouldStashMomentum:)]) { 55 | if ([self.serializer detector:self shouldStashMomentum:stashedMomentum]) { 56 | _stashedMomentum = stashedMomentum; 57 | } 58 | } else { 59 | _stashedMomentum = stashedMomentum; 60 | } 61 | } 62 | 63 | - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView 64 | { 65 | if (self.stashedMomentum) { 66 | if (self.serializer && [self.serializer respondsToSelector:@selector(detector:shouldReleaseMomentum:)]) { 67 | if ([self.serializer detector:self shouldReleaseMomentum:self.stashedMomentum]) { 68 | [self.delegate detectorDidReleaseMomentum:self.stashedMomentum]; 69 | } 70 | } else { 71 | [self.delegate detectorDidReleaseMomentum:self.stashedMomentum]; 72 | } 73 | _stashedMomentum = nil; 74 | } 75 | } 76 | 77 | @end 78 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/CustomScrollView/LNCustomScrollViewClock.m: -------------------------------------------------------------------------------- 1 | // 2 | // LNCustomScrollViewClock.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import "LNCustomScrollViewClock.h" 10 | #import "LNCustomScrollViewClockProxy.h" 11 | #import 12 | 13 | 14 | @interface LNCustomScrollViewClock () 15 | 16 | @property (nonatomic, strong) CADisplayLink *displayLink; 17 | 18 | @property (nonatomic, assign) CFTimeInterval realWorldTime; 19 | 20 | @property (nonatomic, assign) CGFloat speedScale; 21 | 22 | @property (nonatomic, assign) BOOL isPaused; 23 | 24 | @property (nonatomic, assign) NSTimeInterval allTime; 25 | 26 | @property (nonatomic, strong) NSHashTable> *hashTable; 27 | 28 | @end 29 | 30 | @implementation LNCustomScrollViewClock 31 | 32 | - (instancetype)init 33 | { 34 | self = [super init]; 35 | if (self) { 36 | _realWorldTime = CACurrentMediaTime(); 37 | _speedScale = 1.f; 38 | _isPaused = YES; 39 | } 40 | return self; 41 | } 42 | 43 | - (void)addObject:(id)obj 44 | { 45 | [self.hashTable addObject:obj]; 46 | 47 | } 48 | 49 | + (instancetype)shareInstance 50 | { 51 | static LNCustomScrollViewClock* shareInstance = nil; 52 | static dispatch_once_t onceToken; 53 | dispatch_once(&onceToken, ^{ 54 | if (shareInstance == nil) { 55 | shareInstance = [[LNCustomScrollViewClock alloc] init]; 56 | } 57 | }); 58 | return shareInstance; 59 | } 60 | 61 | - (void)dealloc 62 | { 63 | [self stop]; 64 | } 65 | 66 | - (void)resetClock 67 | { 68 | [self stop]; 69 | self.realWorldTime = CACurrentMediaTime(); 70 | self.speedScale = 1.f; 71 | self.isPaused = NO; 72 | _displayLink = [CADisplayLink displayLinkWithTarget:[LNCustomScrollViewClockProxy proxyWithTarget:self] selector:@selector(callback)]; 73 | [_displayLink addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes]; 74 | } 75 | 76 | - (void)callback 77 | { 78 | CFTimeInterval newRealWorldTime = CACurrentMediaTime(); 79 | CFTimeInterval timeInterval = newRealWorldTime - self.realWorldTime; 80 | for (id obj in self.hashTable) { 81 | if ([obj respondsToSelector:@selector(customScrollViewClockUpdateTimeInterval:)]) { 82 | [obj customScrollViewClockUpdateTimeInterval:timeInterval]; 83 | } 84 | } 85 | self.realWorldTime = newRealWorldTime; 86 | } 87 | 88 | - (void)startOrResume 89 | { 90 | if (!_displayLink) { 91 | [self resetClock]; 92 | } 93 | if (self.isPaused) { 94 | self.isPaused = NO; 95 | } 96 | } 97 | 98 | - (void)pause 99 | { 100 | self.isPaused = YES; 101 | } 102 | 103 | - (void)stop 104 | { 105 | self.isPaused = YES; 106 | [_displayLink invalidate]; 107 | _displayLink = nil; 108 | } 109 | 110 | - (NSHashTable *)hashTable 111 | { 112 | if (!_hashTable) { 113 | _hashTable = [[NSHashTable alloc] initWithOptions:NSPointerFunctionsWeakMemory capacity:2]; 114 | } 115 | return _hashTable; 116 | } 117 | 118 | @end 119 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/BouncesObservationViewController.m: -------------------------------------------------------------------------------- 1 | // 2 | // BouncesObservationViewController.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import "BouncesObservationViewController.h" 10 | #import "LNCustomScrollViewClock.h" 11 | #import "DemoCommonCell.h" 12 | 13 | @interface BouncesObservationViewController () 14 | < 15 | UICollectionViewDelegate, 16 | UICollectionViewDataSource, 17 | UICollectionViewDelegateFlowLayout, 18 | LNCustomScrollViewClockProtocol 19 | > 20 | 21 | @property (nonatomic, strong) UICollectionView *collectionView; 22 | 23 | @property (nonatomic, strong) UICollectionViewFlowLayout *flowLayout; 24 | 25 | @property (nonatomic, assign) BOOL isNeedRecord; 26 | 27 | @end 28 | 29 | @implementation BouncesObservationViewController 30 | 31 | - (void)viewDidLoad { 32 | [super viewDidLoad]; 33 | [self addSubviews]; 34 | [self addConstraints]; 35 | self.view.backgroundColor = [UIColor whiteColor]; 36 | 37 | [[LNCustomScrollViewClock shareInstance] addObject:self]; 38 | } 39 | 40 | - (void)customScrollViewClockUpdateTimeInterval:(NSTimeInterval)time 41 | { 42 | if (self.collectionView.contentOffset.y < -64.f && (!self.collectionView.isTracking) && self.isNeedRecord) { 43 | NSLog(@"偏移 %lf", self.collectionView.contentOffset.y); 44 | } 45 | } 46 | 47 | - (void)addSubviews 48 | { 49 | [self.view addSubview:self.collectionView]; 50 | } 51 | 52 | - (void)addConstraints 53 | { 54 | self.collectionView.frame = self.view.bounds; 55 | } 56 | 57 | - (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView 58 | { 59 | return 1; 60 | } 61 | 62 | - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section 63 | { 64 | return 1000; 65 | } 66 | 67 | - (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath 68 | { 69 | DemoCommonCell *cell = [self.collectionView dequeueReusableCellWithReuseIdentifier:kDemoCommonCell forIndexPath:indexPath]; 70 | return cell; 71 | } 72 | 73 | - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath 74 | { 75 | return CGSizeMake(88.f, 88.f); 76 | } 77 | 78 | - (UICollectionView *)collectionView 79 | { 80 | if (!_collectionView) { 81 | _collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:self.flowLayout]; 82 | _collectionView.backgroundColor = [UIColor whiteColor]; 83 | _collectionView.delegate = self; 84 | _collectionView.dataSource = self; 85 | [_collectionView registerClass:DemoCommonCell.class forCellWithReuseIdentifier:kDemoCommonCell]; 86 | } 87 | return _collectionView; 88 | } 89 | 90 | - (UICollectionViewFlowLayout *)flowLayout 91 | { 92 | if (!_flowLayout) { 93 | _flowLayout = [[UICollectionViewFlowLayout alloc] init]; 94 | _flowLayout.scrollDirection = UICollectionViewScrollDirectionVertical; 95 | } 96 | return _flowLayout; 97 | } 98 | 99 | //测量方法 100 | - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset 101 | { 102 | //可以从这里测量出距离和速度的关系 103 | self.isNeedRecord = YES; 104 | 105 | NSLog(@"startY:%@", @(scrollView.contentOffset.y)); 106 | NSLog(@"startVelocity:%@", @(velocity.y)); 107 | } 108 | 109 | - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView 110 | { 111 | self.isNeedRecord = NO; 112 | } 113 | 114 | - (void)scrollViewDidScroll:(UIScrollView *)scrollView 115 | { 116 | 117 | } 118 | 119 | 120 | @end 121 | 122 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/PanGestureObservationViewController.m: -------------------------------------------------------------------------------- 1 | // 2 | // PanGestureObservationViewController.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import "PanGestureObservationViewController.h" 10 | #import "DemoCommonCell.h" 11 | 12 | 13 | @interface PanGestureObservationViewController () 14 | < 15 | UICollectionViewDelegate, 16 | UICollectionViewDataSource, 17 | UICollectionViewDelegateFlowLayout 18 | > 19 | 20 | @property (nonatomic, strong) UICollectionView *collectionView; 21 | 22 | @property (nonatomic, strong) UICollectionViewFlowLayout *flowLayout; 23 | 24 | @property (nonatomic, assign) CGFloat lastPanDisplace; 25 | 26 | @property (nonatomic, assign) CGFloat lastContentOffsetDisplace; 27 | 28 | @property (nonatomic, assign) NSInteger mod; 29 | @property (nonatomic, assign) NSInteger count; 30 | 31 | @end 32 | 33 | @implementation PanGestureObservationViewController 34 | 35 | - (void)viewDidLoad { 36 | [super viewDidLoad]; 37 | 38 | self.mod = 5; 39 | self.count = 1; 40 | 41 | [self addSubviews]; 42 | [self addConstraints]; 43 | self.view.backgroundColor = [UIColor whiteColor]; 44 | } 45 | 46 | - (void)addSubviews 47 | { 48 | [self.view addSubview:self.collectionView]; 49 | } 50 | 51 | - (void)addConstraints 52 | { 53 | self.collectionView.frame = self.view.bounds; 54 | } 55 | 56 | - (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView 57 | { 58 | return 1; 59 | } 60 | 61 | - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section 62 | { 63 | return 1000; 64 | } 65 | 66 | - (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath 67 | { 68 | DemoCommonCell *cell = [self.collectionView dequeueReusableCellWithReuseIdentifier:kDemoCommonCell forIndexPath:indexPath]; 69 | return cell; 70 | } 71 | 72 | - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath 73 | { 74 | return CGSizeMake(88.f, 88.f); 75 | } 76 | 77 | - (UICollectionView *)collectionView 78 | { 79 | if (!_collectionView) { 80 | _collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:self.flowLayout]; 81 | _collectionView.backgroundColor = [UIColor whiteColor]; 82 | _collectionView.delegate = self; 83 | _collectionView.dataSource = self; 84 | [_collectionView registerClass:DemoCommonCell.class forCellWithReuseIdentifier:kDemoCommonCell]; 85 | } 86 | return _collectionView; 87 | } 88 | 89 | - (UICollectionViewFlowLayout *)flowLayout 90 | { 91 | if (!_flowLayout) { 92 | _flowLayout = [[UICollectionViewFlowLayout alloc] init]; 93 | _flowLayout.scrollDirection = UICollectionViewScrollDirectionVertical; 94 | } 95 | return _flowLayout; 96 | } 97 | 98 | - (void)scrollViewDidScroll:(UIScrollView *)scrollView 99 | { 100 | if (scrollView.isTracking) { 101 | if (self.lastPanDisplace < -10000.f) { 102 | self.lastPanDisplace = [scrollView.panGestureRecognizer locationInView:scrollView].y; 103 | } 104 | 105 | if (self.lastContentOffsetDisplace < -10000.f) { 106 | self.lastContentOffsetDisplace = scrollView.contentOffset.y; 107 | } 108 | 109 | CGFloat deltaPanDisplace = [scrollView.panGestureRecognizer locationInView:scrollView].y - self.lastPanDisplace; 110 | 111 | CGFloat deltaContentOffsetDisplace = scrollView.contentOffset.y - self.lastContentOffsetDisplace; 112 | 113 | 114 | self.count++; 115 | if (self.count % self.mod == 0) { 116 | self.lastPanDisplace = [scrollView.panGestureRecognizer locationInView:scrollView].y; 117 | self.lastContentOffsetDisplace = scrollView.contentOffset.y; 118 | 119 | CGFloat convertScale = fabs(deltaContentOffsetDisplace/deltaPanDisplace); 120 | NSLog(@"convertScale:%lf contentOffset:%lf", convertScale, fabs(self.collectionView.contentOffset.y + 88.f)); 121 | } 122 | 123 | } else { 124 | self.lastPanDisplace = -10001.f; 125 | self.lastContentOffsetDisplace = -10001.f; 126 | self.count = 0; 127 | } 128 | } 129 | 130 | @end 131 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/BouncesOptimization/BouncesOptimizationDataList.m: -------------------------------------------------------------------------------- 1 | // 2 | // BouncesOptimizationDataList.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import "BouncesOptimizationDataList.h" 10 | 11 | @interface BouncesOptimizationData () 12 | 13 | @end 14 | 15 | @implementation BouncesOptimizationData 16 | 17 | @end 18 | 19 | 20 | @interface BouncesOptimizationDataList () 21 | 22 | @end 23 | 24 | @implementation BouncesOptimizationDataList 25 | 26 | - (instancetype)init 27 | { 28 | self = [super init]; 29 | if (self) { 30 | [self loadAllLists]; 31 | } 32 | return self; 33 | } 34 | 35 | - (void)loadAllLists 36 | { 37 | [self loadList1]; 38 | [self loadList2]; 39 | [self loadList3]; 40 | } 41 | 42 | - (void)loadList1 43 | { 44 | BouncesOptimizationData *data = [[BouncesOptimizationData alloc] init]; 45 | 46 | data.title = @"数据1"; 47 | data.dataArray = @[ 48 | @(123.6666), 49 | @(172.0000), 50 | @(203.3333), 51 | @(221.6666), 52 | @(230.6666), 53 | @(233.0000), 54 | @(230.3333), 55 | @(224.6666), 56 | @(217.0000), 57 | @(208.0000), 58 | @(198.6666), 59 | @(189.0000), 60 | @(179.3333), 61 | @(170.3333), 62 | @(161.6666), 63 | @(153.6666), 64 | @(146.0000), 65 | @(139.3333), 66 | @(133.3333), 67 | @(128.0000), 68 | @(123.0000), 69 | @(118.6666), 70 | @(114.6666), 71 | @(111.3333), 72 | @(108.3333), 73 | @(105.6666), 74 | @(103.3333), 75 | @(101.3333), 76 | @(99.33333), 77 | @(98.00000), 78 | @(96.66666), 79 | @(95.33333), 80 | @(94.33333), 81 | @(93.33333), 82 | @(92.66666), 83 | @(92.00000), 84 | @(91.33333), 85 | @(91.00000), 86 | @(90.66666), 87 | @(90.33333), 88 | @(90.00000), 89 | @(89.66666), 90 | @(89.33333), 91 | @(89.33333), 92 | @(89.00000), 93 | @(89.00000), 94 | @(88.66666), 95 | @(88.66666), 96 | @(88.66666) 97 | ]; 98 | 99 | data.dataArray = [self cutBaseLine:88.f forArr:data.dataArray]; 100 | 101 | [self.dataMArray addObject:data]; 102 | } 103 | 104 | - (void)loadList2 105 | { 106 | BouncesOptimizationData *data = [[BouncesOptimizationData alloc] init]; 107 | 108 | data.title = @"数据2"; 109 | data.dataArray = @[ 110 | @(73.500000), 111 | @(101.500000), 112 | @(120.000000), 113 | @(131.500000), 114 | @(137.000000), 115 | @(139.000000), 116 | @(138.500000), 117 | @(136.000000), 118 | @(132.500000), 119 | @(128.000000), 120 | @(123.000000), 121 | @(118.000000), 122 | @(113.000000), 123 | @(108.000000), 124 | @(103.500000), 125 | @(99.000000), 126 | @(95.500000), 127 | @(91.500000), 128 | @(88.500000), 129 | @(85.500000), 130 | @(83.000000), 131 | @(80.500000), 132 | @(78.500000), 133 | @(76.500000), 134 | @(75.000000), 135 | @(73.500000), 136 | @(72.000000), 137 | @(71.000000), 138 | @(70.000000), 139 | @(69.500000), 140 | @(68.500000), 141 | @(68.000000), 142 | @(67.500000), 143 | @(67.000000), 144 | @(66.500000), 145 | @(66.000000), 146 | @(66.000000), 147 | @(65.500000), 148 | @(65.500000), 149 | @(65.000000), 150 | @(65.000000), 151 | @(65.000000), 152 | @(64.500000), 153 | @(64.500000), 154 | @(64.500000) 155 | ]; 156 | 157 | data.dataArray = [self cutBaseLine:64.f forArr:data.dataArray]; 158 | 159 | [self.dataMArray addObject:data]; 160 | } 161 | 162 | - (void)loadList3 163 | { 164 | BouncesOptimizationData *data = [[BouncesOptimizationData alloc] init]; 165 | 166 | data.title = @"数据3"; 167 | data.dataArray = @[ 168 | @(457.50000), 169 | @(448.50000), 170 | @(431.50000), 171 | @(409.50000), 172 | @(384.50000), 173 | @(358.50000), 174 | @(332.00000), 175 | @(306.50000), 176 | @(282.00000), 177 | @(259.00000), 178 | @(237.50000), 179 | @(218.00000), 180 | @(200.00000), 181 | @(183.50000), 182 | @(169.00000), 183 | @(156.00000), 184 | @(144.50000), 185 | @(134.50000), 186 | @(125.00000), 187 | @(117.00000), 188 | @(110.00000), 189 | @(104.00000), 190 | @(98.500000), 191 | @(94.000000), 192 | @(90.000000), 193 | @(86.500000), 194 | @(83.500000), 195 | @(80.500000), 196 | @(78.500000), 197 | @(76.500000), 198 | @(74.500000), 199 | @(73.000000), 200 | @(72.000000), 201 | @(70.500000), 202 | @(69.500000), 203 | @(69.000000), 204 | @(68.000000), 205 | @(67.500000), 206 | @(67.000000), 207 | @(66.500000), 208 | @(66.000000), 209 | @(66.000000), 210 | @(65.500000), 211 | @(65.500000), 212 | @(65.000000), 213 | @(65.000000), 214 | @(65.000000), 215 | @(64.500000), 216 | @(64.500000), 217 | @(64.500000) 218 | ]; 219 | 220 | data.dataArray = [self cutBaseLine:64.f forArr:data.dataArray]; 221 | 222 | [self.dataMArray addObject:data]; 223 | } 224 | 225 | - (NSArray *)cutBaseLine:(float)baseLine forArr:(NSArray *)arr 226 | { 227 | NSMutableArray *resultMArr = [[NSMutableArray alloc] initWithCapacity:arr.count]; 228 | for (NSNumber *num in arr) { 229 | float cutNum = [num floatValue] - baseLine; 230 | [resultMArr addObject:@(cutNum)]; 231 | } 232 | return resultMArr.copy; 233 | } 234 | 235 | - (NSMutableArray *)dataMArray 236 | { 237 | if (!_dataMArray) { 238 | _dataMArray = [[NSMutableArray alloc] init]; 239 | } 240 | return _dataMArray; 241 | } 242 | 243 | @end 244 | 245 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Main/MainViewController.m: -------------------------------------------------------------------------------- 1 | // 2 | // MainViewController.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import "MainViewController.h" 10 | #import "DemoItemObj.h" 11 | #import "DemoItemCollectionViewCell.h" 12 | #import "DecelerateObservationViewController.h" 13 | #import "BouncesObservationViewController.h" 14 | #import "BouncesOptimizationViewController.h" 15 | #import "PanGestureObservationViewController.h" 16 | #import "CustomScrollViewViewController.h" 17 | #import "MomentumTransmitViewController.h" 18 | 19 | @interface MainViewController () 20 | 21 | @property (nonatomic, copy) NSArray *demoItemArr; 22 | 23 | @property (nonatomic, strong) UICollectionView *collectionView; 24 | @property (nonatomic, strong) UICollectionViewFlowLayout *flowLayout; 25 | 26 | @end 27 | 28 | @implementation MainViewController 29 | 30 | - (void)viewDidLoad { 31 | [super viewDidLoad]; 32 | [self addSubviews]; 33 | [self addConstraints]; 34 | [self loadObjs]; 35 | } 36 | 37 | - (void)addSubviews 38 | { 39 | [self.view addSubview:self.collectionView]; 40 | } 41 | 42 | - (void)addConstraints 43 | { 44 | self.collectionView.frame = self.view.bounds; 45 | } 46 | 47 | - (void)loadObjs 48 | { 49 | NSMutableArray *demoItemMArr = [[NSMutableArray alloc] init]; 50 | 51 | DemoItemObj *decelerateMeasureObj = [[DemoItemObj alloc] init]; 52 | decelerateMeasureObj.type = DemoTypeDecelerateObservation; 53 | decelerateMeasureObj.title = @"Decelerate"; 54 | [demoItemMArr addObject:decelerateMeasureObj]; 55 | 56 | DemoItemObj *bouncesMeasureObj = [[DemoItemObj alloc] init]; 57 | bouncesMeasureObj.type = DemoTypeBouncesObservation; 58 | bouncesMeasureObj.title = @"Bounces"; 59 | [demoItemMArr addObject:bouncesMeasureObj]; 60 | 61 | DemoItemObj *optimizationObj = [[DemoItemObj alloc] init]; 62 | optimizationObj.type = DemoTypeOptimization; 63 | optimizationObj.title = @"Optimization"; 64 | [demoItemMArr addObject:optimizationObj]; 65 | 66 | DemoItemObj *panGestureMeasureObj = [[DemoItemObj alloc] init]; 67 | panGestureMeasureObj.type = DemoTypePanGestureObservation; 68 | panGestureMeasureObj.title = @"PanGesture"; 69 | [demoItemMArr addObject:panGestureMeasureObj]; 70 | 71 | DemoItemObj *customScrollViewObj = [[DemoItemObj alloc] init]; 72 | customScrollViewObj.type = DemoTypeCustomScrollView; 73 | customScrollViewObj.title = @"CustomScrollView"; 74 | [demoItemMArr addObject:customScrollViewObj]; 75 | 76 | DemoItemObj *momentumTransmitObj = [[DemoItemObj alloc] init]; 77 | momentumTransmitObj.type = DemoTypeMomentumTransmit; 78 | momentumTransmitObj.title = @"Momentum"; 79 | [demoItemMArr addObject:momentumTransmitObj]; 80 | 81 | self.demoItemArr = demoItemMArr.copy; 82 | 83 | [self.collectionView reloadData]; 84 | } 85 | 86 | - (UICollectionView *)collectionView 87 | { 88 | if (!_collectionView) { 89 | _collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:self.flowLayout]; 90 | _collectionView.delegate = self; 91 | _collectionView.dataSource = self; 92 | _collectionView.backgroundColor = [UIColor whiteColor]; 93 | [_collectionView registerClass:DemoItemCollectionViewCell.class forCellWithReuseIdentifier:kDemoItemCollectionViewCell]; 94 | 95 | } 96 | return _collectionView; 97 | } 98 | 99 | - (UICollectionViewFlowLayout *)flowLayout 100 | { 101 | if (!_flowLayout) { 102 | _flowLayout = [[UICollectionViewFlowLayout alloc] init]; 103 | _flowLayout.sectionInset = UIEdgeInsetsMake(20.f, 20.f, 20.f, 20.f); 104 | } 105 | return _flowLayout; 106 | } 107 | 108 | - (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView 109 | { 110 | return 1; 111 | } 112 | 113 | - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section 114 | { 115 | return self.demoItemArr.count; 116 | } 117 | 118 | - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath 119 | { 120 | return CGSizeMake(self.view.frame.size.width/2.f - 42.f, 44.f); 121 | } 122 | 123 | - (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath 124 | { 125 | DemoItemCollectionViewCell *cell = (DemoItemCollectionViewCell *)[collectionView dequeueReusableCellWithReuseIdentifier:kDemoItemCollectionViewCell forIndexPath:indexPath]; 126 | [cell setItemObj:self.demoItemArr[indexPath.row]]; 127 | return cell; 128 | } 129 | 130 | - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath 131 | { 132 | [collectionView deselectItemAtIndexPath:indexPath animated:NO]; 133 | switch (self.demoItemArr[indexPath.row].type) { 134 | case DemoTypeDecelerateObservation: { 135 | DecelerateObservationViewController *vc = [[DecelerateObservationViewController alloc] init]; 136 | [self.navigationController pushViewController:vc animated:YES]; 137 | } break; 138 | case DemoTypeBouncesObservation: { 139 | BouncesObservationViewController *vc = [[BouncesObservationViewController alloc] init]; 140 | [self.navigationController pushViewController:vc animated:YES]; 141 | } break; 142 | case DemoTypeOptimization: { 143 | BouncesOptimizationViewController *vc = [[BouncesOptimizationViewController alloc] init]; 144 | [self.navigationController pushViewController:vc animated:YES]; 145 | } break; 146 | case DemoTypePanGestureObservation: { 147 | PanGestureObservationViewController *vc = [[PanGestureObservationViewController alloc] init]; 148 | [self.navigationController pushViewController:vc animated:YES]; 149 | } break; 150 | case DemoTypeCustomScrollView: { 151 | CustomScrollViewViewController *vc = [[CustomScrollViewViewController alloc] init]; 152 | [self.navigationController pushViewController:vc animated:YES]; 153 | } break; 154 | case DemoTypeMomentumTransmit: { 155 | MomentumTransmitViewController *vc = [[MomentumTransmitViewController alloc] init]; 156 | [self.navigationController pushViewController:vc animated:YES]; 157 | } 158 | default: { 159 | 160 | } break; 161 | } 162 | } 163 | 164 | @end 165 | 166 | 167 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/Momentum/LNMomentumImpulser.m: -------------------------------------------------------------------------------- 1 | // 2 | // LNMomentumImpulser.m 3 | // LNMomentumTransmitDemo 4 | // 5 | // Created by Levison on 2022/7/17. 6 | // 7 | 8 | #import "LNMomentumImpulser.h" 9 | #import "LNVelocityDynamicItem.h" 10 | 11 | @interface LNMomentumImpulser () 12 | 13 | @property (nonatomic, strong) UIDynamicAnimator *animator; 14 | @property (nonatomic, weak) UIDynamicItemBehavior *decelerationBehavior; 15 | @property (nonatomic, strong) LNVelocityDynamicItem *velocityItem; 16 | 17 | @property (nonatomic, assign) CGPoint stashedContentOffset; 18 | 19 | @property (nonatomic, weak) UIScrollView *targetScrollView; 20 | 21 | @end 22 | 23 | @implementation LNMomentumImpulser 24 | 25 | - (instancetype)initWithTargetScrollView:(UIScrollView *)targetScrollView 26 | { 27 | self = [super init]; 28 | if (self) { 29 | self.targetScrollView = targetScrollView; 30 | self.mass = 1; 31 | _velocityItem = [[LNVelocityDynamicItem alloc] init]; 32 | _animator = [[UIDynamicAnimator alloc] initWithReferenceView:targetScrollView]; 33 | } 34 | return self; 35 | } 36 | 37 | - (void)detectorDidReleaseMomentum:(LNMomentumObj *)momentum 38 | { 39 | if (self.serializer && [self.serializer respondsToSelector:@selector(impulser:shouldReactToMomentum:)] && (![self.serializer impulser:self shouldReactToMomentum:momentum])) { 40 | return; 41 | } 42 | 43 | if (self.serializer && [self.serializer respondsToSelector:@selector(impulser:momentumForOriginalMomentum:)]) { 44 | momentum = [self.serializer impulser:self momentumForOriginalMomentum:momentum]; 45 | } 46 | 47 | if (!momentum) { 48 | return; 49 | } 50 | 51 | if (self.targetScrollView && self.mass != 0) { 52 | self.stashedContentOffset = self.targetScrollView.contentOffset; 53 | switch (momentum.direction) { 54 | case LNMomentumDirectionLeft: { 55 | [self pulseHorizontalVelocity:-momentum.momentumValue/self.mass resistance:2.f]; 56 | } break; 57 | case LNMomentumDirectionRight: { 58 | [self pulseHorizontalVelocity:momentum.momentumValue/self.mass resistance:2.f]; 59 | } break; 60 | case LNMomentumDirectionTop: { 61 | [self pulseVerticalVelocity:-momentum.momentumValue/self.mass resistance:2.f]; 62 | } break; 63 | case LNMomentumDirectionBottom: { 64 | [self pulseVerticalVelocity:momentum.momentumValue/self.mass resistance:2.f]; 65 | } break; 66 | default: 67 | break; 68 | } 69 | } 70 | } 71 | 72 | - (void)removeCurrentMomentum 73 | { 74 | [self.animator removeAllBehaviors]; 75 | self.decelerationBehavior = nil; 76 | } 77 | 78 | - (void)pulseHorizontalVelocity:(CGFloat)velocity resistance:(CGFloat)resistance 79 | { 80 | if (!self.targetScrollView) { 81 | return; 82 | } 83 | 84 | if ([self.targetScrollView isMemberOfClass:[UIScrollView class]]) { 85 | return; 86 | } 87 | 88 | [self removeCurrentMomentum]; 89 | 90 | self.velocityItem.center = self.targetScrollView.contentOffset; 91 | UIDynamicItemBehavior *decelerationBehavior = [[UIDynamicItemBehavior alloc] initWithItems:@[self.velocityItem]]; 92 | [decelerationBehavior addLinearVelocity:CGPointMake(velocity, 0) forItem:self.velocityItem]; 93 | decelerationBehavior.resistance = 2.0; 94 | 95 | __weak LNMomentumImpulser *weakSelf = self; 96 | decelerationBehavior.action = ^{ 97 | if (weakSelf.targetScrollView.tracking || weakSelf.targetScrollView.dragging || weakSelf.targetScrollView.decelerating || (!weakSelf.targetScrollView.scrollEnabled)) { 98 | [weakSelf.animator removeAllBehaviors]; 99 | } else if (fabs(weakSelf.stashedContentOffset.x - weakSelf.targetScrollView.contentOffset.x) > 1.f) { 100 | [weakSelf.animator removeAllBehaviors]; 101 | } else if (weakSelf.velocityItem.center.x < 0) { 102 | [weakSelf.animator removeAllBehaviors]; 103 | weakSelf.targetScrollView.contentOffset = CGPointMake(0, weakSelf.targetScrollView.contentOffset.y); 104 | } else if (weakSelf.velocityItem.center.x > weakSelf.targetScrollView.contentSize.width - weakSelf.targetScrollView.frame.size.width) { 105 | [weakSelf.animator removeAllBehaviors]; 106 | weakSelf.targetScrollView.contentOffset = CGPointMake(MAX(weakSelf.targetScrollView.contentSize.width - weakSelf.targetScrollView.frame.size.width, 0), weakSelf.targetScrollView.contentOffset.y) ; 107 | } else { 108 | CGPoint contentOffset = weakSelf.targetScrollView.contentOffset; 109 | contentOffset = weakSelf.velocityItem.center; 110 | weakSelf.targetScrollView.contentOffset = contentOffset; 111 | weakSelf.stashedContentOffset = contentOffset; 112 | } 113 | 114 | if (fabs([weakSelf.decelerationBehavior linearVelocityForItem:weakSelf.velocityItem].x)< 13.f) { 115 | [weakSelf.animator removeAllBehaviors]; 116 | } 117 | }; 118 | 119 | [self.animator addBehavior:decelerationBehavior]; 120 | self.decelerationBehavior = decelerationBehavior; 121 | } 122 | 123 | - (void)pulseVerticalVelocity:(CGFloat)velocity resistance:(CGFloat)resistance 124 | { 125 | if (!self.targetScrollView) { 126 | return; 127 | } 128 | 129 | if ([self.targetScrollView isMemberOfClass:[UIScrollView class]]) { 130 | return; 131 | } 132 | 133 | [self removeCurrentMomentum]; 134 | 135 | self.velocityItem.center = self.targetScrollView.contentOffset; 136 | UIDynamicItemBehavior *decelerationBehavior = [[UIDynamicItemBehavior alloc] initWithItems:@[self.velocityItem]]; 137 | [decelerationBehavior addLinearVelocity:CGPointMake(0, velocity) forItem:self.velocityItem]; 138 | decelerationBehavior.resistance = 2.0; 139 | 140 | __weak LNMomentumImpulser *weakSelf = self; 141 | decelerationBehavior.action = ^{ 142 | if (weakSelf.targetScrollView.tracking || weakSelf.targetScrollView.dragging || weakSelf.targetScrollView.decelerating || (!weakSelf.targetScrollView.scrollEnabled)) { 143 | [weakSelf.animator removeAllBehaviors]; 144 | } else if (fabs(weakSelf.stashedContentOffset.y - weakSelf.targetScrollView.contentOffset.y) > 1.f) { 145 | [weakSelf.animator removeAllBehaviors]; 146 | } else if (weakSelf.velocityItem.center.y < - weakSelf.targetScrollView.contentInset.top) { 147 | [weakSelf.animator removeAllBehaviors]; 148 | weakSelf.targetScrollView.contentOffset = CGPointMake(weakSelf.targetScrollView.contentOffset.x, - weakSelf.targetScrollView.contentInset.top); 149 | } else if (weakSelf.velocityItem.center.y > weakSelf.targetScrollView.contentSize.height + weakSelf.targetScrollView.contentInset.bottom - weakSelf.targetScrollView.frame.size.height) { 150 | [weakSelf.animator removeAllBehaviors]; 151 | weakSelf.targetScrollView.contentOffset = CGPointMake(weakSelf.targetScrollView.contentOffset.x, MAX( weakSelf.targetScrollView.contentSize.height + weakSelf.targetScrollView.contentInset.bottom - weakSelf.targetScrollView.frame.size.height, 0)) ; 152 | } else { 153 | CGPoint contentOffset = weakSelf.targetScrollView.contentOffset; 154 | contentOffset = weakSelf.velocityItem.center; 155 | weakSelf.targetScrollView.contentOffset = contentOffset; 156 | weakSelf.stashedContentOffset = contentOffset; 157 | } 158 | 159 | if (fabs([weakSelf.decelerationBehavior linearVelocityForItem:weakSelf.velocityItem].y) < 13.f) { 160 | [weakSelf.animator removeAllBehaviors]; 161 | } 162 | }; 163 | 164 | [self.animator addBehavior:decelerationBehavior]; 165 | self.decelerationBehavior = decelerationBehavior; 166 | } 167 | 168 | @end 169 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/BouncesOptimization/BouncesOptimizationTrainer.m: -------------------------------------------------------------------------------- 1 | // 2 | // BouncesOptimizationTrainer.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import "BouncesOptimizationTrainer.h" 10 | 11 | @interface LNBouncesOptimizationTrainerResult () 12 | 13 | @end 14 | 15 | @implementation LNBouncesOptimizationTrainerResult 16 | 17 | @end 18 | 19 | @interface LNBouncesOptimizationTrainer () 20 | 21 | @property (atomic, assign) LNBouncesOptimizationTrainerStatus status; 22 | 23 | @property (atomic, assign) BOOL shouldStop; 24 | 25 | @property (nonatomic, copy) NSArray *originalArray; 26 | 27 | @end 28 | 29 | @implementation LNBouncesOptimizationTrainer 30 | { 31 | dispatch_queue_t _coculateQueue; 32 | } 33 | 34 | - (instancetype)init 35 | { 36 | self = [super init]; 37 | if (self) { 38 | _coculateQueue = dispatch_queue_create(0, DISPATCH_QUEUE_SERIAL); 39 | } 40 | return self; 41 | } 42 | 43 | - (void)setObservationData:(NSArray *)observationArr 44 | { 45 | if (self.status == LNBouncesOptimizationTrainerStatusFree) { 46 | _originalArray = [observationArr copy]; 47 | } 48 | } 49 | 50 | - (void)startTraining 51 | { 52 | if (self.status == LNBouncesOptimizationTrainerStatusTraining) { 53 | return; 54 | } 55 | 56 | if (!self.originalArray || self.originalArray.count <= 0) { 57 | return; 58 | } 59 | 60 | __weak LNBouncesOptimizationTrainer *weakSelf = self; 61 | self.status = LNBouncesOptimizationTrainerStatusTraining; 62 | dispatch_async(_coculateQueue, ^{ 63 | [weakSelf train]; 64 | }); 65 | } 66 | 67 | - (void)stopTraining 68 | { 69 | if (self.status == LNBouncesOptimizationTrainerStatusFree) { 70 | return; 71 | } 72 | 73 | self.shouldStop = YES; 74 | __weak LNBouncesOptimizationTrainer *weakSelf = self; 75 | dispatch_async(_coculateQueue, ^{ 76 | weakSelf.shouldStop = NO; 77 | weakSelf.status = LNBouncesOptimizationTrainerStatusTraining; 78 | dispatch_async(dispatch_get_main_queue(), ^{ 79 | if (weakSelf.delegate && [weakSelf.delegate respondsToSelector:@selector(trainerDidInterrupted)]) { 80 | weakSelf.status = LNBouncesOptimizationTrainerStatusFree; 81 | [weakSelf.delegate trainerDidInterrupted]; 82 | } 83 | }); 84 | }); 85 | } 86 | 87 | - (void)train 88 | { 89 | float bias = 1000000000.f; 90 | 91 | //v0 = 410.f A = 426.f; 92 | //v0 = 2504.f A = 2493.f 93 | //v0 = 2661.f A = 2636.f 94 | float A = 0.f; 95 | float Delta = 0.f; 96 | float Phi = 0.f; 97 | 98 | float AStep = 1.f; 99 | float DeltaStep = 0.01f; 100 | float PhiStep = 0.001f; 101 | 102 | while (1) { 103 | 104 | if (self.shouldStop) { 105 | return; 106 | } 107 | 108 | float tryA1 = A + AStep; 109 | float bias1 = 0.f; 110 | 111 | for (NSInteger i = 0 ; i < self.originalArray.count ; i++) { 112 | float realValue = [self.originalArray[i] floatValue]; 113 | float t = (Phi + i * 0.0167f); 114 | float coculateValue = tryA1 * t * expf(-Delta*t); 115 | bias1 += (coculateValue - realValue)*(coculateValue - realValue); 116 | } 117 | 118 | float tryA2 = A - AStep; 119 | float bias2 = 0.f; 120 | for (NSInteger i = 0 ; i < self.originalArray.count ; i++) { 121 | float realValue = [self.originalArray[i] floatValue]; 122 | float t = (Phi + i * 0.0167f); 123 | float coculateValue = tryA2 * t * expf(-Delta*t); 124 | bias2 += (coculateValue - realValue)*(coculateValue - realValue); 125 | } 126 | 127 | float tryDelta3 = Delta + DeltaStep; 128 | float bias3 = 0.f; 129 | for (NSInteger i = 0 ; i < self.originalArray.count ; i++) { 130 | float realValue = [self.originalArray[i] floatValue]; 131 | float t = (Phi + i * 0.0167f); 132 | float coculateValue = A * t * expf(-tryDelta3*t); 133 | bias3 += (coculateValue - realValue)*(coculateValue - realValue); 134 | } 135 | 136 | float tryDelta4 = Delta - DeltaStep; 137 | float bias4 = 0.f; 138 | for (NSInteger i = 0 ; i < self.originalArray.count ; i++) { 139 | float realValue = [self.originalArray[i] floatValue]; 140 | float t = (Phi + i * 0.0167f); 141 | float coculateValue = A * t * expf(-tryDelta4*t); 142 | bias4 += (coculateValue - realValue)*(coculateValue - realValue); 143 | } 144 | 145 | 146 | float tryPhi5 = Phi + PhiStep; 147 | float bias5 = 0.f; 148 | for (NSInteger i = 0 ; i < self.originalArray.count ; i++) { 149 | float realValue = [self.originalArray[i] floatValue]; 150 | float t = (tryPhi5 + i * 0.0167f); 151 | float coculateValue = A * t * expf(-Delta*t); 152 | bias5 += (coculateValue - realValue)*(coculateValue - realValue); 153 | } 154 | 155 | float tryPhi6 = Phi - PhiStep; 156 | float bias6 = 0.f; 157 | for (NSInteger i = 0 ; i < self.originalArray.count ; i++) { 158 | float realValue = [self.originalArray[i] floatValue]; 159 | float t = (tryPhi6 + i * 0.0167f); 160 | float coculateValue = A * t * expf(-Delta*t); 161 | bias6 += (coculateValue - realValue)*(coculateValue - realValue); 162 | } 163 | 164 | float chooseBias = MIN(MIN(MIN(bias1, bias2), MIN(bias3, bias4)), MIN(bias5, bias6)); 165 | 166 | LNBouncesOptimizationTrainerResult *result = [[LNBouncesOptimizationTrainerResult alloc] init]; 167 | result.currentBias = chooseBias; 168 | 169 | if (chooseBias > bias) { 170 | __weak LNBouncesOptimizationTrainer *weakSelf = self; 171 | result.phi = Phi; 172 | result.a = A; 173 | result.delta = Delta; 174 | dispatch_sync(dispatch_get_main_queue(), ^{ 175 | if (weakSelf.delegate && [weakSelf.delegate respondsToSelector:@selector(trainerDidFinish:)]) { 176 | [weakSelf.delegate trainerDidFinish:result]; 177 | } 178 | }); 179 | break; 180 | } else { 181 | bias = chooseBias; 182 | __weak LNBouncesOptimizationTrainer *weakSelf = self; 183 | if (chooseBias == bias1) { 184 | A = tryA1; 185 | } else if (chooseBias == bias2) { 186 | A = tryA2; 187 | } else if (chooseBias == bias3) { 188 | Delta = tryDelta3; 189 | } else if (chooseBias == bias4) { 190 | Delta = tryDelta4; 191 | } else if (chooseBias == bias5) { 192 | Phi = tryPhi5; 193 | } else if (chooseBias == bias6) { 194 | Phi = tryPhi6; 195 | } else { 196 | result.phi = Phi; 197 | result.a = A; 198 | result.delta = Delta; 199 | dispatch_sync(dispatch_get_main_queue(), ^{ 200 | if (weakSelf.delegate && [weakSelf.delegate respondsToSelector:@selector(trainerDidFinish:)]) { 201 | [weakSelf.delegate trainerDidFinish:result]; 202 | } 203 | }); 204 | break; 205 | } 206 | result.phi = Phi; 207 | result.a = A; 208 | result.delta = Delta; 209 | dispatch_sync(dispatch_get_main_queue(), ^{ 210 | if (weakSelf.delegate && [weakSelf.delegate respondsToSelector:@selector(trainerDidUpdate:)]) { 211 | [weakSelf.delegate trainerDidUpdate:result]; 212 | } 213 | }); 214 | } 215 | } 216 | } 217 | 218 | @end 219 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/MomentumTransmitViewController.m: -------------------------------------------------------------------------------- 1 | // 2 | // MomentumTransmitViewController.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 17.7.22. 6 | // Copyright © 2022 Levison. All rights reserved. 7 | // 8 | 9 | #import "MomentumTransmitViewController.h" 10 | #import "LNRestMomentumDetector.h" 11 | #import "LNMomentumImpulser.h" 12 | 13 | @interface MomentumTransmitViewController () 14 | 15 | @property (nonatomic, strong) UICollectionView *collectionView1; 16 | @property (nonatomic, strong) UICollectionViewFlowLayout *flowLayout1; 17 | @property (nonatomic, strong) UICollectionView *collectionView2; 18 | @property (nonatomic, strong) UICollectionViewFlowLayout *flowLayout2; 19 | 20 | //这对是把collectionView1的向右冲量传给collectionView2转为下冲量 21 | @property (nonatomic, strong) LNRestMomentumDetector *detector12; 22 | @property (nonatomic, strong) LNMomentumImpulser *impulser12; 23 | 24 | //这对是把collectionView2的向上冲量传给collectionView1转为左冲量 25 | @property (nonatomic, strong) LNRestMomentumDetector *detector21; 26 | @property (nonatomic, strong) LNMomentumImpulser *impulser21; 27 | 28 | //通常只需要单方向 29 | 30 | @end 31 | 32 | @implementation MomentumTransmitViewController 33 | 34 | - (void)viewDidLoad { 35 | [super viewDidLoad]; 36 | [self addSubviews]; 37 | [self addConstraints]; 38 | // Do any additional setup after loading the view. 39 | } 40 | 41 | - (void)addSubviews 42 | { 43 | [self.view addSubview:self.collectionView1]; 44 | [self.view addSubview:self.collectionView2]; 45 | } 46 | 47 | - (void)addConstraints 48 | { 49 | self.collectionView1.frame = CGRectMake(0.f, 0.f, self.view.bounds.size.width, self.view.bounds.size.height/2.f); 50 | self.collectionView2.frame = CGRectMake(0.f, self.view.bounds.size.height/2.f, self.view.bounds.size.width, self.view.bounds.size.height/2.f); 51 | 52 | } 53 | 54 | - (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView 55 | { 56 | return 1; 57 | } 58 | 59 | - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section 60 | { 61 | return 50; 62 | } 63 | 64 | - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath 65 | { 66 | return CGSizeMake(100.f, 100.f); 67 | } 68 | 69 | - (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath 70 | { 71 | UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"kCollectionViewCell" forIndexPath:indexPath]; 72 | cell.backgroundColor = [UIColor colorWithRed:(random()%255)/255.f green:(random()%255)/255.f blue:(random()%255)/255.f alpha:1.f]; 73 | return cell; 74 | } 75 | 76 | - (UICollectionView *)collectionView1 77 | { 78 | if (!_collectionView1) { 79 | _collectionView1 = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:self.flowLayout1]; 80 | _collectionView1.delegate = self; 81 | _collectionView1.dataSource = self; 82 | //因为只有减速没有弹性，所以这里是局限 83 | _collectionView1.bounces = NO; 84 | [_collectionView1 registerClass:UICollectionViewCell.class forCellWithReuseIdentifier:@"kCollectionViewCell"]; 85 | } 86 | return _collectionView1; 87 | } 88 | 89 | - (UICollectionView *)collectionView2 90 | { 91 | if (!_collectionView2) { 92 | _collectionView2 = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:self.flowLayout2]; 93 | _collectionView2.dataSource = self; 94 | _collectionView2.delegate = self; 95 | //因为只有减速没有弹性，所以这里是局限 96 | _collectionView2.bounces = NO; 97 | [_collectionView2 registerClass:UICollectionViewCell.class forCellWithReuseIdentifier:@"kCollectionViewCell"]; 98 | } 99 | return _collectionView2; 100 | } 101 | 102 | - (UICollectionViewFlowLayout *)flowLayout1 103 | { 104 | if (!_flowLayout1) { 105 | _flowLayout1 = [[UICollectionViewFlowLayout alloc] init]; 106 | _flowLayout1.scrollDirection = UICollectionViewScrollDirectionHorizontal; 107 | } 108 | return _flowLayout1; 109 | } 110 | 111 | - (UICollectionViewFlowLayout *)flowLayout2 112 | { 113 | if (!_flowLayout2) { 114 | _flowLayout2 = [[UICollectionViewFlowLayout alloc] init]; 115 | _flowLayout2.scrollDirection = UICollectionViewScrollDirectionVertical; 116 | } 117 | return _flowLayout2; 118 | } 119 | 120 | - (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset 121 | { 122 | if (scrollView == self.collectionView1) { 123 | [self.detector12 scrollViewWillEndDragging:scrollView withVelocity:velocity targetContentOffset:targetContentOffset]; 124 | } 125 | 126 | if (scrollView == self.collectionView2) { 127 | [self.detector21 scrollViewWillEndDragging:scrollView withVelocity:velocity targetContentOffset:targetContentOffset]; 128 | } 129 | } 130 | 131 | - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate 132 | { 133 | if (scrollView == self.collectionView2) { 134 | if (!decelerate) { 135 | [self.impulser12 removeCurrentMomentum]; 136 | } 137 | } 138 | 139 | if (scrollView == self.collectionView1) { 140 | if (!decelerate) { 141 | [self.impulser21 removeCurrentMomentum]; 142 | } 143 | } 144 | } 145 | 146 | - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView 147 | { 148 | if (scrollView == self.collectionView1) { 149 | [self.detector12 scrollViewDidEndDecelerating:scrollView]; 150 | [self.impulser21 removeCurrentMomentum]; 151 | } 152 | 153 | if (scrollView == self.collectionView2) { 154 | [self.detector21 scrollViewDidEndDecelerating:scrollView]; 155 | [self.impulser12 removeCurrentMomentum]; 156 | } 157 | } 158 | 159 | - (void)scrollViewDidEndScrollingAnimation:(UIScrollView *)scrollView 160 | { 161 | if (scrollView == self.collectionView2) { 162 | [self.impulser12 removeCurrentMomentum]; 163 | } 164 | 165 | if (scrollView == self.collectionView1) { 166 | [self.impulser21 removeCurrentMomentum]; 167 | } 168 | } 169 | 170 | - (LNRestMomentumDetector *)detector12 171 | { 172 | if (!_detector12) { 173 | _detector12 = [[LNRestMomentumDetector alloc] init]; 174 | _detector12.delegate = self.impulser12; 175 | _detector12.serializer = self; 176 | _detector12.effectDirection = LNMomentumEffectDirectionHorizontal; 177 | } 178 | return _detector12; 179 | } 180 | 181 | // LNRestMomentumSerializer , 判断某个剩余速度是否应该生效 182 | - (BOOL)detector:(LNRestMomentumDetector *)detector shouldStashMomentum:(LNMomentumObj *)momentum 183 | { 184 | if (detector == self.detector12) { 185 | //只有撞到右侧边界才生效 186 | switch (momentum.direction) { 187 | case LNMomentumDirectionRight: { 188 | return YES; 189 | } break; 190 | default: return NO; 191 | break; 192 | } 193 | return NO; 194 | } else if (detector == self.detector21){ 195 | //只有撞到顶部才生效 196 | switch (momentum.direction) { 197 | case LNMomentumDirectionTop: { 198 | return YES; 199 | } break; 200 | default: return NO; 201 | break; 202 | } 203 | return NO; 204 | } 205 | return NO; 206 | } 207 | 208 | - (LNMomentumImpulser *)impulser12 209 | { 210 | if (!_impulser12) { 211 | _impulser12 = [[LNMomentumImpulser alloc] initWithTargetScrollView:self.collectionView2]; 212 | _impulser12.serializer = self; 213 | } 214 | return _impulser12; 215 | } 216 | 217 | - (BOOL)impulser:(LNMomentumImpulser *)impulser shouldReactToMomentum:(LNMomentumObj *)momentum 218 | { 219 | return YES; 220 | } 221 | 222 | - (LNMomentumObj *)impulser:(LNMomentumImpulser *)impulser momentumForOriginalMomentum:(LNMomentumObj *)obj 223 | { 224 | //传过来是向右，过滤成向下 225 | if (impulser == self.impulser12) { 226 | obj.direction = LNMomentumDirectionBottom; 227 | return obj; 228 | } else if (impulser == self.impulser21) { 229 | obj.direction = LNMomentumDirectionLeft; 230 | return obj; 231 | } 232 | return obj; 233 | } 234 | 235 | - (LNMomentumImpulser *)impulser21 236 | { 237 | if (!_impulser21) { 238 | _impulser21 = [[LNMomentumImpulser alloc] initWithTargetScrollView:self.collectionView1]; 239 | _impulser21.serializer = self; 240 | //这样修改质量之后detector21 会很难撞动impulser21，impulser21只能获取到detector21yuliang速度的十分之一 241 | //m1*v1 = m2*v2 242 | //_impulser21.mass = 10.f; 243 | } 244 | return _impulser21; 245 | } 246 | 247 | - (LNRestMomentumDetector *)detector21 248 | { 249 | if (!_detector21) { 250 | _detector21 = [[LNRestMomentumDetector alloc] init]; 251 | _detector21.delegate = self.impulser21; 252 | _detector21.serializer = self; 253 | _detector21.effectDirection = LNMomentumEffectDirectionVertical; 254 | //_detector21.mass = 1; 255 | } 256 | return _detector21; 257 | } 258 | 259 | @end 260 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/Demo/BouncesOptimizationViewController.m: -------------------------------------------------------------------------------- 1 | // 2 | // BouncesOptimizationViewController.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import "BouncesOptimizationViewController.h" 10 | #import "BouncesOptimizationTrainer.h" 11 | #import "BouncesOptimizationDataList.h" 12 | #import "DemoCommonCell.h" 13 | 14 | 15 | #define BorderLineStartPointX 20.f 16 | #define BorderLineStartPointY 300.f 17 | 18 | #define xBorderLineLength 300.f 19 | #define yBorderLineLength 200.f 20 | 21 | @interface BouncesOptimizationViewController () 22 | < 23 | UICollectionViewDelegate, 24 | UICollectionViewDataSource, 25 | UICollectionViewDelegateFlowLayout, 26 | LNBouncesOptimizationTrainerDelegate 27 | > 28 | 29 | @property (nonatomic, strong) BouncesOptimizationDataList *dataList; 30 | 31 | @property (nonatomic, strong) UICollectionView *collectionView; 32 | @property (nonatomic, strong) UICollectionViewFlowLayout *flowLayout; 33 | 34 | @property (nonatomic, strong) UILabel *selectionLabel; 35 | 36 | @property (nonatomic, strong) UIView *backgroundContainerView; 37 | @property (nonatomic, strong) UIView *yBorderLine; 38 | @property (nonatomic, strong) UIView *xBorderLine; 39 | 40 | @property (nonatomic, strong) UIView *originalDataPointContainerView; 41 | @property (nonatomic, strong) UIView *optimizationDataPointContainerView; 42 | 43 | @property (nonatomic, strong) UILabel *biasLabel; 44 | @property (nonatomic, strong) UILabel *deltaLabel; 45 | @property (nonatomic, strong) UILabel *aLabel; 46 | @property (nonatomic, strong) UILabel *phiLabel; 47 | 48 | @property (nonatomic, weak) NSArray *currentOriginalDataArray; 49 | @property (nonatomic, copy) NSArray *currentOptimizationArray; 50 | 51 | @property (nonatomic, strong) UIButton *startButton; 52 | @property (nonatomic, strong) UIButton *stopButton; 53 | 54 | @property (nonatomic, strong) LNBouncesOptimizationTrainer *trainer; 55 | 56 | @end 57 | 58 | @implementation BouncesOptimizationViewController 59 | 60 | - (void)viewDidLoad { 61 | [super viewDidLoad]; 62 | 63 | self.view.backgroundColor = [UIColor whiteColor]; 64 | [self addSubviews]; 65 | [self addConstraints]; 66 | } 67 | 68 | - (void)addSubviews 69 | { 70 | [self.view addSubview:self.collectionView]; 71 | [self.view addSubview:self.selectionLabel]; 72 | 73 | [self.view addSubview:self.backgroundContainerView]; 74 | [self.backgroundContainerView addSubview:self.xBorderLine]; 75 | [self.backgroundContainerView addSubview:self.yBorderLine]; 76 | [self.backgroundContainerView addSubview:self.biasLabel]; 77 | [self.backgroundContainerView addSubview:self.aLabel]; 78 | [self.backgroundContainerView addSubview:self.deltaLabel]; 79 | [self.backgroundContainerView addSubview:self.phiLabel]; 80 | 81 | [self.view addSubview:self.originalDataPointContainerView]; 82 | [self.view addSubview:self.optimizationDataPointContainerView]; 83 | 84 | 85 | 86 | [self.view addSubview:self.startButton]; 87 | [self.view addSubview:self.stopButton]; 88 | } 89 | 90 | - (void)addConstraints 91 | { 92 | self.collectionView.frame = CGRectMake(0.f, 88.f, self.view.frame.size.width - 132.f, 44.f); 93 | self.selectionLabel.frame = CGRectMake(self.view.frame.size.width - 120.f, 88.f, 108.f, 44.f); 94 | 95 | self.backgroundContainerView.frame = CGRectMake(0.f, 132.f, self.view.frame.size.width, self.view.frame.size.height- 132.f - 88.f); 96 | self.xBorderLine.frame = CGRectMake(BorderLineStartPointX, BorderLineStartPointY, xBorderLineLength, 1.f/[UIScreen mainScreen].scale); 97 | self.yBorderLine.frame = CGRectMake(BorderLineStartPointX, BorderLineStartPointY - yBorderLineLength, 1.f/[UIScreen mainScreen].scale, yBorderLineLength); 98 | 99 | self.biasLabel.frame = CGRectMake(20.f, 10.f, 200.f, 20.f); 100 | self.aLabel.frame = CGRectMake(20.f, 30.f, 200.f, 20.f); 101 | self.deltaLabel.frame = CGRectMake(20.f, 50.f, 200.f, 20.f); 102 | self.phiLabel.frame = CGRectMake(20.f, 70.f, 200.f, 20.f); 103 | 104 | self.originalDataPointContainerView.frame = self.backgroundContainerView.frame; 105 | self.optimizationDataPointContainerView.frame = self.backgroundContainerView.frame; 106 | 107 | self.startButton.frame = CGRectMake(0.f, self.view.frame.size.height - 132.f, self.view.frame.size.width/2.f, 88.f); 108 | self.stopButton.frame = CGRectMake(self.view.frame.size.width/2.f, self.view.frame.size.height - 132.f, self.view.frame.size.width/2.f, 88.f); 109 | } 110 | 111 | - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section 112 | { 113 | return self.dataList.dataMArray.count; 114 | } 115 | 116 | - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath 117 | { 118 | return CGSizeMake(88.f, 44.f); 119 | } 120 | 121 | - (__kindof UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath 122 | { 123 | DemoCommonCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:kDemoCommonCell forIndexPath:indexPath]; 124 | cell.titleLabel.text = [self.dataList.dataMArray objectAtIndex:indexPath.item].title; 125 | return cell; 126 | } 127 | 128 | - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath 129 | { 130 | self.currentOriginalDataArray = [self.dataList.dataMArray objectAtIndex:indexPath.row].dataArray; 131 | [self redrawOriginalData]; 132 | self.selectionLabel.text = [self.dataList.dataMArray objectAtIndex:indexPath.row].title; 133 | } 134 | 135 | - (void)redrawOriginalData 136 | { 137 | [self redraw:self.currentOriginalDataArray inContainerView:self.originalDataPointContainerView color:[UIColor blackColor]]; 138 | } 139 | 140 | - (void)redrawOptimizationData 141 | { 142 | [self redraw:self.currentOptimizationArray inContainerView:self.optimizationDataPointContainerView color:[UIColor redColor]]; 143 | } 144 | 145 | - (void)redraw:(NSArray *)numberArray inContainerView:(UIView *)containerView color:(UIColor *)color 146 | { 147 | for (UIView *subview in containerView.subviews) { 148 | [subview removeFromSuperview]; 149 | } 150 | 151 | for (NSInteger i = 0; i < numberArray.count ; i++) { 152 | UIView *pointView = [[UIView alloc] init]; 153 | pointView.backgroundColor = color; 154 | [containerView addSubview:pointView]; 155 | 156 | pointView.frame = CGRectMake(BorderLineStartPointX + i * 5.f, BorderLineStartPointY - [numberArray[i] floatValue] , 2.f, 2.f); 157 | } 158 | } 159 | 160 | - (UILabel *)selectionLabel 161 | { 162 | if (!_selectionLabel) { 163 | _selectionLabel = [[UILabel alloc] init]; 164 | _selectionLabel.textColor = [UIColor blackColor]; 165 | } 166 | return _selectionLabel; 167 | } 168 | 169 | - (UICollectionView *)collectionView 170 | { 171 | if (!_collectionView) { 172 | _collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero collectionViewLayout:self.flowLayout]; 173 | [_collectionView registerClass:DemoCommonCell.class forCellWithReuseIdentifier:kDemoCommonCell]; 174 | _collectionView.delegate = self; 175 | _collectionView.dataSource = self; 176 | _collectionView.allowsSelection = YES; 177 | _collectionView.allowsMultipleSelection = NO; 178 | _collectionView.backgroundColor = [UIColor whiteColor]; 179 | _collectionView.contentInset = UIEdgeInsetsMake(0.f, 24.f, 0.f, 24.f); 180 | } 181 | return _collectionView; 182 | } 183 | 184 | - (UICollectionViewFlowLayout *)flowLayout 185 | { 186 | if (!_flowLayout) { 187 | _flowLayout = [[UICollectionViewFlowLayout alloc] init]; 188 | _flowLayout.scrollDirection = UICollectionViewScrollDirectionHorizontal; 189 | } 190 | return _flowLayout; 191 | } 192 | 193 | - (UIView *)backgroundContainerView 194 | { 195 | if (!_backgroundContainerView) { 196 | _backgroundContainerView = [[UIView alloc] init]; 197 | } 198 | return _backgroundContainerView; 199 | } 200 | 201 | - (UIView *)xBorderLine 202 | { 203 | if (!_xBorderLine) { 204 | _xBorderLine = [[UIView alloc] init]; 205 | _xBorderLine.backgroundColor = [UIColor blueColor]; 206 | } 207 | return _xBorderLine; 208 | } 209 | 210 | - (UIView *)yBorderLine 211 | { 212 | if (!_yBorderLine) { 213 | _yBorderLine = [[UIView alloc] init]; 214 | _yBorderLine.backgroundColor = [UIColor redColor]; 215 | } 216 | return _yBorderLine; 217 | } 218 | 219 | - (UIView *)originalDataPointContainerView 220 | { 221 | if (!_originalDataPointContainerView) { 222 | _originalDataPointContainerView = [[UIView alloc] init]; 223 | } 224 | return _originalDataPointContainerView; 225 | } 226 | 227 | - (UIView *)optimizationDataPointContainerView 228 | { 229 | if (!_optimizationDataPointContainerView) { 230 | _optimizationDataPointContainerView = [[UIView alloc] init]; 231 | } 232 | return _optimizationDataPointContainerView; 233 | } 234 | 235 | - (BouncesOptimizationDataList *)dataList 236 | { 237 | if (!_dataList) { 238 | _dataList = [[BouncesOptimizationDataList alloc] init]; 239 | } 240 | return _dataList; 241 | } 242 | 243 | - (UIButton *)startButton 244 | { 245 | if (!_startButton) { 246 | _startButton = [[UIButton alloc] init]; 247 | _startButton.backgroundColor = [UIColor colorWithRed:(rand()%255)/255.f green:(rand()%255)/255.f blue:(rand()%255)/255.f alpha:(rand()%255)/255.f]; 248 | [_startButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; 249 | [_startButton setTitle:@"Start" forState:UIControlStateNormal]; 250 | [_startButton addTarget:self action:@selector(startButtonClicked) forControlEvents:UIControlEventTouchUpInside]; 251 | } 252 | return _startButton; 253 | } 254 | 255 | - (void)startButtonClicked 256 | { 257 | [self.trainer setObservationData:self.currentOriginalDataArray]; 258 | [self.trainer startTraining]; 259 | } 260 | 261 | - (UIButton *)stopButton 262 | { 263 | if (!_stopButton) { 264 | _stopButton = [[UIButton alloc] init]; 265 | [_stopButton setTitle:@"Stop" forState:UIControlStateNormal]; 266 | [_stopButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal]; 267 | _stopButton.backgroundColor = [UIColor colorWithRed:(rand()%255)/255.f green:(rand()%255)/255.f blue:(rand()%255)/255.f alpha:(rand()%255)/255.f]; 268 | [_stopButton addTarget:self action:@selector(stopButtonClicked) forControlEvents:UIControlEventTouchUpInside]; 269 | } 270 | return _stopButton; 271 | } 272 | 273 | - (void)stopButtonClicked 274 | { 275 | [self.trainer stopTraining]; 276 | } 277 | 278 | - (LNBouncesOptimizationTrainer *)trainer 279 | { 280 | if (!_trainer) { 281 | _trainer = [[LNBouncesOptimizationTrainer alloc] init]; 282 | _trainer.delegate = self; 283 | } 284 | return _trainer; 285 | } 286 | 287 | - (void)trainerDidUpdate:(LNBouncesOptimizationTrainerResult *)tempResult 288 | { 289 | NSLog(@"%f", tempResult.currentBias); 290 | NSMutableArray *mArr = [[NSMutableArray alloc] initWithCapacity:self.currentOriginalDataArray.count]; 291 | for (NSInteger i = 0 ; i < self.currentOriginalDataArray.count; i++) { 292 | float t = (i * 0.0167f + tempResult.phi); 293 | float resultValue = tempResult.a * t * expf(- tempResult.delta * t); 294 | [mArr addObject:@(resultValue)]; 295 | } 296 | self.currentOptimizationArray = mArr.copy; 297 | [self redrawOptimizationData]; 298 | 299 | self.aLabel.text = [NSString stringWithFormat:@"a:%@",@(tempResult.a)]; 300 | self.deltaLabel.text = [NSString stringWithFormat:@"delta:%@",@(tempResult.delta)]; 301 | self.phiLabel.text = [NSString stringWithFormat:@"phi:%@", @(tempResult.phi)]; 302 | self.biasLabel.text = [NSString stringWithFormat:@"bias:%@", @(tempResult.currentBias)]; 303 | } 304 | 305 | - (void)trainerDidFinish:(LNBouncesOptimizationTrainerResult *)finalResult 306 | { 307 | self.aLabel.text = [NSString stringWithFormat:@"a:%@",@(finalResult.a)]; 308 | self.deltaLabel.text = [NSString stringWithFormat:@"delta:%@",@(finalResult.delta)]; 309 | self.phiLabel.text = [NSString stringWithFormat:@"phi:%@", @(finalResult.phi)]; 310 | self.biasLabel.text = [NSString stringWithFormat:@"bias:%@", @(finalResult.currentBias)]; 311 | } 312 | 313 | - (void)trainerDidInterrupted 314 | { 315 | [self clear]; 316 | } 317 | 318 | - (void)clear 319 | { 320 | for (UIView *subview in self.originalDataPointContainerView.subviews) { 321 | [subview removeFromSuperview]; 322 | } 323 | 324 | for (UIView *subview in self.optimizationDataPointContainerView.subviews) { 325 | [subview removeFromSuperview]; 326 | } 327 | 328 | self.biasLabel.text = @""; 329 | self.aLabel.text = @""; 330 | self.deltaLabel.text = @""; 331 | self.phiLabel.text = @""; 332 | } 333 | 334 | - (UILabel *)biasLabel 335 | { 336 | if (!_biasLabel) { 337 | _biasLabel = [[UILabel alloc] init]; 338 | _biasLabel.textColor = [UIColor blackColor]; 339 | } 340 | return _biasLabel; 341 | } 342 | 343 | - (UILabel *)aLabel 344 | { 345 | if (!_aLabel) { 346 | _aLabel = [[UILabel alloc] init]; 347 | _aLabel.textColor = [UIColor blackColor]; 348 | } 349 | return _aLabel; 350 | } 351 | 352 | - (UILabel *)deltaLabel 353 | { 354 | if (!_deltaLabel) { 355 | _deltaLabel = [[UILabel alloc] init]; 356 | _deltaLabel.textColor = [UIColor blackColor]; 357 | } 358 | return _deltaLabel; 359 | } 360 | 361 | - (UILabel *)phiLabel 362 | { 363 | if (!_phiLabel) { 364 | _phiLabel = [[UILabel alloc] init]; 365 | _phiLabel.textColor = [UIColor blackColor]; 366 | } 367 | return _phiLabel; 368 | } 369 | 370 | @end 371 | 372 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView/CustomScrollView/LNCustomScrollView.m: -------------------------------------------------------------------------------- 1 | // 2 | // LNCustomScrollView.m 3 | // LNCustomScrollView 4 | // 5 | // Created by Levison on 5.4.21. 6 | // Copyright © 2021 Levison. All rights reserved. 7 | // 8 | 9 | #import "LNCustomScrollView.h" 10 | #import "LNCustomScrollViewClock.h" 11 | 12 | #define BounceDisplaceConvertDelta 0.006f 13 | #define BounceDisplaceConvertC 0.88f 14 | #define BounceDisplaceConvertBias 0.12f 15 | 16 | #define MaxIgnoredVelocity 13.f 17 | 18 | #define BouncesTimeMultiple 1.1f 19 | 20 | @interface LNCustomScrollViewDirectionalStatus: NSObject 21 | 22 | @property (nonatomic, assign) CGFloat velocity; 23 | 24 | @property (nonatomic, assign) CGFloat position; 25 | 26 | @end 27 | 28 | @implementation LNCustomScrollViewDirectionalStatus 29 | 30 | @end 31 | 32 | @interface LNCustomScrollViewDirectionalRange: NSObject 33 | 34 | @property (nonatomic, assign) CGFloat minPosition; 35 | 36 | @property (nonatomic, assign) CGFloat maxPosition; 37 | 38 | @end 39 | 40 | @implementation LNCustomScrollViewDirectionalRange 41 | 42 | @end 43 | 44 | @interface LNCustomScrollView () 45 | < 46 | LNCustomScrollViewClockProtocol 47 | > 48 | 49 | @property (nonatomic, strong) UIPanGestureRecognizer *panGesture; 50 | 51 | @property (nonatomic, assign) BOOL isTracking; 52 | @property (nonatomic, assign) BOOL tracking; 53 | 54 | @property (nonatomic, assign) CGPoint startContentOffset; 55 | @property (nonatomic, assign) CGPoint startPanLocation; 56 | 57 | @property (nonatomic, assign) CGPoint velocity; 58 | 59 | @property (nonatomic, assign) CGPoint contentOffset; 60 | 61 | @end 62 | 63 | @implementation LNCustomScrollView 64 | 65 | - (instancetype)init 66 | { 67 | self = [super init]; 68 | if (self) { 69 | 70 | } 71 | return self; 72 | } 73 | 74 | - (instancetype)initWithFrame:(CGRect)frame 75 | { 76 | self = [super initWithFrame:frame]; 77 | if (self) { 78 | self.bounces = YES; 79 | self.velocity = CGPointMake(0.f, 0.f); 80 | self.contentOffset = CGPointMake(0.f, 0.f); 81 | [[LNCustomScrollViewClock shareInstance] addObject:self]; 82 | [self addGestureRecognizer:self.panGesture]; 83 | } 84 | return self; 85 | } 86 | 87 | - (void)setContentOffset:(CGPoint)contentOffset 88 | { 89 | _contentOffset = contentOffset; 90 | self.bounds = CGRectMake(contentOffset.x, contentOffset.y, self.bounds.size.width, self.bounds.size.height); 91 | } 92 | 93 | - (void)setFrame:(CGRect)frame 94 | { 95 | [super setFrame:frame]; 96 | } 97 | 98 | - (void)setContentSize:(CGSize)contentSize 99 | { 100 | _contentSize = contentSize; 101 | } 102 | 103 | - (UIPanGestureRecognizer *)panGesture 104 | { 105 | if (!_panGesture) { 106 | _panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(dealWithPanEvent:)]; 107 | } 108 | return _panGesture; 109 | } 110 | 111 | - (void)dealWithPanEvent:(UIPanGestureRecognizer *)panGesture 112 | { 113 | if (self.panGesture.state == UIGestureRecognizerStateBegan) { 114 | self.startContentOffset = CGPointMake(self.contentOffset.x, self.contentOffset.y); 115 | self.startPanLocation = [self.panGesture translationInView:self]; 116 | self.isTracking = YES; 117 | } else if (self.panGesture.state == UIGestureRecognizerStateChanged) { 118 | self.isTracking = YES; 119 | CGPoint currentPanLocation = [self.panGesture translationInView:self]; 120 | 121 | CGFloat targetX = self.startContentOffset.x - (currentPanLocation.x - self.startPanLocation.x); 122 | CGFloat targetY = self.startContentOffset.y - (currentPanLocation.y - self.startPanLocation.y); 123 | 124 | if (!self.bounces) { 125 | targetX = [self getInsideXOf:targetX]; 126 | targetY = [self getInsideYOf:targetY]; 127 | } else { 128 | targetX = [self getBouncesXOf:targetX]; 129 | targetY = [self getBouncesYOf:targetY]; 130 | } 131 | 132 | self.contentOffset = CGPointMake(targetX, targetY); 133 | } else { 134 | //possible 135 | self.isTracking = NO; 136 | 137 | self.startPanLocation = CGPointZero; 138 | self.startContentOffset = CGPointZero; 139 | } 140 | } 141 | 142 | - (void)customScrollViewClockUpdateTimeInterval:(NSTimeInterval)time 143 | { 144 | if (CGPointEqualToPoint(CGPointZero, self.velocity) && 145 | self.contentOffset.y > 0.f && 146 | self.contentOffset.y < self.contentSize.height - self.bounds.size.height && 147 | self.contentOffset.x > 0.f && 148 | self.contentOffset.x < self.contentSize.width - self.bounds.size.width) { 149 | return; 150 | } 151 | 152 | if (!self.isTracking) { 153 | //检查是否有剩余动画 154 | if (fabs(self.velocity.x) > MaxIgnoredVelocity || self.contentOffset.x < 0.f || self.contentOffset.x > self.contentSize.width - self.bounds.size.width) { 155 | LNCustomScrollViewDirectionalStatus *status = [[LNCustomScrollViewDirectionalStatus alloc] init]; 156 | status.position = self.contentOffset.x; 157 | status.velocity = self.velocity.x; 158 | LNCustomScrollViewDirectionalRange *range = [[LNCustomScrollViewDirectionalRange alloc] init]; 159 | range.minPosition = 0.f; 160 | range.maxPosition = MAX(self.contentSize.width - self.bounds.size.width, 0.f); 161 | LNCustomScrollViewDirectionalStatus *resultStatus = [self stepFromStatus:status inRange:range afterDuring:time bounces:YES]; 162 | 163 | self.velocity = CGPointMake(resultStatus.velocity, self.velocity.y); 164 | self.contentOffset = CGPointMake(resultStatus.position, self.contentOffset.y); 165 | } else { 166 | self.velocity = CGPointMake(0.f, self.velocity.y); 167 | } 168 | 169 | if (fabs(self.velocity.y) > MaxIgnoredVelocity || self.contentOffset.y < 0.f || self.contentOffset.y > self.contentSize.height - self.bounds.size.height) { 170 | LNCustomScrollViewDirectionalStatus *status = [[LNCustomScrollViewDirectionalStatus alloc] init]; 171 | status.position = self.contentOffset.y; 172 | status.velocity = self.velocity.y; 173 | LNCustomScrollViewDirectionalRange *range = [[LNCustomScrollViewDirectionalRange alloc] init]; 174 | range.minPosition = 0.f; 175 | range.maxPosition = MAX(self.contentSize.height - self.bounds.size.height, 0.f); 176 | LNCustomScrollViewDirectionalStatus *resultStatus = [self stepFromStatus:status inRange:range afterDuring:time bounces:YES]; 177 | 178 | self.velocity = CGPointMake(self.velocity.x, resultStatus.velocity); 179 | self.contentOffset = CGPointMake(self.contentOffset.x, resultStatus.position); 180 | } else { 181 | self.velocity = CGPointMake(self.velocity.x, 0.f); 182 | } 183 | } else { 184 | } 185 | } 186 | 187 | - (LNCustomScrollViewDirectionalStatus *)stepFromStatus:(LNCustomScrollViewDirectionalStatus *)status 188 | inRange:(LNCustomScrollViewDirectionalRange *)range 189 | afterDuring:(NSTimeInterval)during 190 | bounces:(BOOL)bounces 191 | { 192 | CGFloat originalVelocity = status.velocity; 193 | CGFloat originalPosition = status.position; 194 | 195 | LNCustomScrollViewDirectionalStatus *resultStatus = [[LNCustomScrollViewDirectionalStatus alloc] init]; 196 | 197 | //先区分所在位置 198 | if (originalPosition < range.minPosition) { 199 | //在顶端 200 | CGFloat distanceToBalancePoint = range.minPosition - originalPosition; 201 | CGFloat velocity = originalVelocity; 202 | 203 | if (fabs(velocity) == 0) { 204 | velocity = +0; 205 | } 206 | 207 | NSTimeInterval t; 208 | if (velocity/distanceToBalancePoint > -10.9) { 209 | t = 1.f/(10.9 + velocity/distanceToBalancePoint); 210 | CGFloat A = distanceToBalancePoint/(t * exp(-10.9 * t)); 211 | NSTimeInterval targetT = t + during * BouncesTimeMultiple; 212 | 213 | CGFloat targetVelocity = A * exp(-10.9 * targetT) + A * targetT * (-10.9) * exp(-10.9 * targetT); 214 | CGFloat targetPosition = A * targetT * exp(-10.9 * targetT); 215 | resultStatus.velocity = targetVelocity; 216 | resultStatus.position = range.minPosition - targetPosition; 217 | 218 | if (velocity < MaxIgnoredVelocity && distanceToBalancePoint < 1.f) { 219 | resultStatus.position = range.minPosition; 220 | resultStatus.velocity = 0.f; 221 | } 222 | } else { 223 | resultStatus.position = range.minPosition; 224 | resultStatus.velocity = 0.f; 225 | } 226 | 227 | } else if (originalPosition > range.maxPosition) { 228 | //在底端 229 | CGFloat distanceToBalancePoint = originalPosition - range.maxPosition; 230 | CGFloat velocity = originalVelocity; 231 | 232 | if (fabs(velocity) == 0) { 233 | velocity = +0; 234 | } 235 | 236 | NSTimeInterval t; 237 | if (velocity/distanceToBalancePoint > -10.9f) { 238 | t = 1.f/(10.9 + velocity/distanceToBalancePoint); 239 | CGFloat A = distanceToBalancePoint/(t * exp(-10.9 * t)); 240 | NSTimeInterval targetT = t + during * BouncesTimeMultiple; 241 | 242 | CGFloat targetVelocity = A * exp(-10.9 * targetT) + A * targetT * (-10.9) * exp(-10.9 * targetT); 243 | CGFloat targetPosition = A * targetT * exp(-10.9 * targetT); 244 | resultStatus.velocity = targetVelocity; 245 | resultStatus.position = range.maxPosition + targetPosition; 246 | 247 | if (velocity < MaxIgnoredVelocity && distanceToBalancePoint < 1.f) { 248 | resultStatus.position = range.maxPosition; 249 | resultStatus.velocity = 0.f; 250 | } 251 | } else { 252 | resultStatus.position = range.maxPosition; 253 | resultStatus.velocity = 0.f; 254 | } 255 | } else { 256 | //在中央 257 | 258 | CGFloat estimatedVelocity = exp(log(fabs(originalVelocity))- 2*during) * (originalVelocity > 0.f ? 1.f:(-1.f)); 259 | CGFloat estimatedDistance = fabs(estimatedVelocity - originalVelocity)/2.f * (originalVelocity > 0.f ? 1.f:(-1.f)); 260 | CGFloat estimatedPosition = originalPosition + estimatedDistance; 261 | 262 | 263 | //这个运动被分为两段decelerate，减速和bounces 264 | if (estimatedPosition < range.minPosition) { 265 | CGFloat restDistance = fabs(originalPosition - range.minPosition); 266 | CGFloat v0 = fabs(originalVelocity) - restDistance * 2.f; 267 | 268 | CGFloat decelerateT = log(v0/(restDistance + v0))/2.f; 269 | 270 | CGFloat bouncesT = MAX(0, during - decelerateT); 271 | 272 | CGFloat bouncesDistance = v0 * bouncesT * exp(- 10.9 * bouncesT); 273 | CGFloat targetPosition = range.minPosition - bouncesDistance; 274 | 275 | CGFloat targetVelocity = v0*exp(-10.9*bouncesT) + v0*bouncesT*(-10.9)*exp(-10.9*bouncesT); 276 | 277 | if (!self.bounces) { 278 | resultStatus.position = range.minPosition; 279 | resultStatus.velocity = 0.f; 280 | } else { 281 | if (fabs(targetVelocity) > MaxIgnoredVelocity) { 282 | resultStatus.position = targetPosition; 283 | resultStatus.velocity = targetVelocity; 284 | } else { 285 | resultStatus.position = range.minPosition; 286 | resultStatus.velocity = 0.f; 287 | } 288 | } 289 | 290 | } else if (estimatedPosition > range.maxPosition) { 291 | CGFloat restDistance = fabs(originalPosition - range.maxPosition); 292 | CGFloat v0 = fabs(originalVelocity) - restDistance * 2.f; 293 | 294 | CGFloat decelerateT = log(v0/(restDistance + v0))/2.f; 295 | 296 | CGFloat bouncesT = MAX(0, during - decelerateT); 297 | 298 | CGFloat bouncesDistance = v0 * bouncesT * exp(- 10.9 * bouncesT); 299 | CGFloat targetPosition = range.maxPosition + bouncesDistance; 300 | 301 | CGFloat targetVelocity = v0*exp(-10.9*bouncesT) + v0*bouncesT*(-10.9)*exp(-10.9*bouncesT); 302 | 303 | 304 | if (!self.bounces) { 305 | resultStatus.position = range.maxPosition; 306 | resultStatus.velocity = 0.f; 307 | } else { 308 | if (fabs(targetVelocity) > MaxIgnoredVelocity) { 309 | resultStatus.position = targetPosition; 310 | resultStatus.velocity = targetVelocity; 311 | } else { 312 | resultStatus.position = range.maxPosition; 313 | resultStatus.velocity = 0.f; 314 | } 315 | } 316 | 317 | } else { 318 | //正常的减速 319 | resultStatus.position = estimatedPosition; 320 | resultStatus.velocity = estimatedVelocity; 321 | } 322 | } 323 | 324 | return resultStatus; 325 | } 326 | 327 | - (CGFloat)getInsideXOf:(CGFloat)targetX 328 | { 329 | 330 | if (targetX < 0.f) { 331 | targetX = 0.f; 332 | } 333 | 334 | if (targetX > self.contentSize.width - self.frame.size.width) { 335 | if (self.contentSize.width - self.frame.size.width > 0.f) { 336 | targetX = self.contentSize.width - self.frame.size.width; 337 | } else { 338 | targetX = 0.f; 339 | } 340 | } 341 | return targetX; 342 | } 343 | 344 | - (CGFloat)getInsideYOf:(CGFloat)targetY 345 | { 346 | 347 | if (targetY < 0.f) { 348 | targetY = 0.f; 349 | } 350 | 351 | if (targetY > self.contentSize.height - self.frame.size.height) { 352 | if (self.contentSize.height - self.frame.size.height > 0.f) { 353 | targetY = self.contentSize.height - self.frame.size.height; 354 | } else { 355 | targetY = 0.f; 356 | } 357 | } 358 | return targetY; 359 | } 360 | 361 | 362 | - (CGFloat)getBouncesXOf:(CGFloat)targetX 363 | { 364 | if (targetX < 0.f) { 365 | CGFloat resultX = BounceDisplaceConvertC * (1/BounceDisplaceConvertDelta) * (1 - exp(-BounceDisplaceConvertDelta * fabs(targetX))) + BounceDisplaceConvertBias *fabs(targetX); 366 | return -resultX; 367 | } else if (targetX > self.contentSize.width - self.frame.size.width) { 368 | CGFloat displace = targetX - (self.contentSize.width - self.frame.size.width); 369 | CGFloat resultDisplace = BounceDisplaceConvertC *(1/BounceDisplaceConvertDelta) * (1 - exp(-BounceDisplaceConvertDelta * fabs(displace))) + BounceDisplaceConvertBias * fabs(displace); 370 | CGFloat resultX = (self.contentSize.width - self.frame.size.width) + resultDisplace; 371 | return resultX; 372 | } else { 373 | return targetX; 374 | } 375 | } 376 | 377 | - (CGFloat)getBouncesYOf:(CGFloat)targetY 378 | { 379 | if (targetY < 0.f) { 380 | CGFloat resultY = BounceDisplaceConvertC * (1/BounceDisplaceConvertDelta) * (1 - exp(-BounceDisplaceConvertDelta * fabs(targetY))) + BounceDisplaceConvertBias *fabs(targetY); 381 | return -resultY; 382 | } else if (targetY > self.contentSize.height - self.frame.size.height) { 383 | CGFloat displace = targetY - (self.contentSize.height - self.frame.size.height); 384 | CGFloat resultDisplace = BounceDisplaceConvertC * (1/BounceDisplaceConvertDelta) * (1 - exp(-BounceDisplaceConvertDelta * fabs(displace))) + BounceDisplaceConvertBias * fabs(displace); 385 | CGFloat resultY = (self.contentSize.height - self.frame.size.height) + resultDisplace; 386 | return resultY; 387 | } else { 388 | return targetY; 389 | } 390 | } 391 | 392 | - (void)setIsTracking:(BOOL)isTracking 393 | { 394 | _isTracking = isTracking; 395 | if (_isTracking != self.tracking) { 396 | self.tracking = _isTracking; 397 | } 398 | } 399 | 400 | - (void)setTracking:(BOOL)tracking 401 | { 402 | _tracking = tracking; 403 | if (tracking) { 404 | //停止所有动画 405 | self.velocity = CGPointZero; 406 | 407 | } else { 408 | //检查有没有没做完的动画 409 | CGPoint velocity = [self.panGesture velocityInView:self]; 410 | 411 | CGFloat velocityX = velocity.x; 412 | if (self.contentSize.width <= self.bounds.size.width) { 413 | velocityX = 0.f; 414 | } 415 | 416 | if (self.contentOffset.x < 0 || self.contentOffset.x > self.contentSize.width) { 417 | velocityX = 0.f; 418 | } 419 | 420 | CGFloat velocityY = velocity.y; 421 | if (self.contentSize.height <= self.bounds.size.height) { 422 | velocityY = 0.f; 423 | } 424 | 425 | if (self.contentOffset.y < 0 || self.contentOffset.y > self.contentSize.height) { 426 | velocityY = 0.f; 427 | } 428 | 429 | self.velocity = CGPointMake(- velocityX, - velocityY); 430 | 431 | //NSLog(@"%lf,%lf",velocity.x, velocity.y); 432 | } 433 | } 434 | 435 | @end 436 | 437 | -------------------------------------------------------------------------------- /LNCustomScrollView/LNCustomScrollView.xcodeproj/project.pbxproj: -------------------------------------------------------------------------------- 1 | // !$*UTF8*$! 2 | { 3 | archiveVersion = 1; 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