- (void)reset;- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event;//以上方法在分類 UIGestureRecognizer (UIGestureRecognizerProtected) 中聲明，更多方法聲明請(qǐng)自行查看

typedef NS_ENUM(NSInteger, UIGestureRecognizerState) {  UIGestureRecognizerStatePossible,  // 尚未識(shí)別是何種手勢(shì)操作（但可能已經(jīng)觸發(fā)了觸摸事件），默認(rèn)狀態(tài)  UIGestureRecognizerStateBegan,   // 手勢(shì)已經(jīng)開(kāi)始，此時(shí)已經(jīng)被識(shí)別，但是這個(gè)過(guò)程中可能發(fā)生變化，手勢(shì)操作尚未完成  UIGestureRecognizerStateChanged,  // 手勢(shì)狀態(tài)發(fā)生轉(zhuǎn)變  UIGestureRecognizerStateEnded,   // 手勢(shì)識(shí)別操作完成（此時(shí)已經(jīng)松開(kāi)手指）  UIGestureRecognizerStateCancelled, // 手勢(shì)被取消，恢復(fù)到默認(rèn)狀態(tài)  UIGestureRecognizerStateFailed,   // 手勢(shì)識(shí)別失敗，恢復(fù)到默認(rèn)狀態(tài)  UIGestureRecognizerStateRecognized = UIGestureRecognizerStateEnded // 手勢(shì)識(shí)別完成，同UIGestureRecognizerStateEnded};

#import <UIKit/UIKit.h>typedef NS_ENUM(NSUInteger, Direction) {  DirectionUnknown,  DirectionLeft,  DirectionRight};@interface KMGestureRecognizer : UIGestureRecognizer@property (assign, nonatomic) NSUInteger tickleCount; //撓癢次數(shù)@property (assign, nonatomic) CGPoint currentTickleStart; //當(dāng)前撓癢開(kāi)始坐標(biāo)位置@property (assign, nonatomic) Direction lastDirection; //最后一次撓癢方向@end

#import "KMGestureRecognizer.h"#import <UIKit/UIGestureRecognizerSubclass.h>@implementation KMGestureRecognizer#define kMinTickleSpacing 20.0#define kMaxTickleCount 3- (void)reset {  _tickleCount = 0;  _currentTickleStart = CGPointZero;  _lastDirection = DirectionUnknown;    if (self.state == UIGestureRecognizerStatePossible) {    self.state = UIGestureRecognizerStateFailed;  }}- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {  UITouch *touch = [touches anyObject];  _currentTickleStart = [touch locationInView:self.view]; //設(shè)置當(dāng)前撓癢開(kāi)始坐標(biāo)位置}- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {  //『當(dāng)前撓癢開(kāi)始坐標(biāo)位置』和『移動(dòng)后坐標(biāo)位置』進(jìn)行 X 軸值比較，得到是向左還是向右移動(dòng)  UITouch *touch = [touches anyObject];  CGPoint tickleEnd = [touch locationInView:self.view];  CGFloat tickleSpacing = tickleEnd.x - _currentTickleStart.x;  Direction currentDirection = tickleSpacing < 0 ? DirectionLeft : DirectionRight;    //移動(dòng)的 X 軸間距值是否符合要求，足夠大  if (ABS(tickleSpacing) >= kMinTickleSpacing) {    //判斷是否有三次不同方向的動(dòng)作，如果有則手勢(shì)結(jié)束，將執(zhí)行回調(diào)方法    if (_lastDirection == DirectionUnknown ||      (_lastDirection == DirectionLeft && currentDirection == DirectionRight) ||      (_lastDirection == DirectionRight && currentDirection == DirectionLeft)) {      _tickleCount++;      _currentTickleStart = tickleEnd;      _lastDirection = currentDirection;            if (_tickleCount >= kMaxTickleCount && self.state == UIGestureRecognizerStatePossible) {        self.state = UIGestureRecognizerStateEnded;        //NSLog(@"自定義手勢(shì)成功，將執(zhí)行回調(diào)方法");      }    }  }}- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {  [self reset];}- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {  [self reset];}@end

#import <UIKit/UIKit.h>#import "KMGestureRecognizer.h"@interface ViewController : UIViewController@property (strong, nonatomic) UIImageView *imgV;@property (strong, nonatomic) UIImageView *imgV2;@property (strong, nonatomic) KMGestureRecognizer *customGestureRecognizer;@end

#import "ViewController.h"@interface ViewController ()- (void)handlePan:(UIPanGestureRecognizer *)recognizer;- (void)handlePinch:(UIPinchGestureRecognizer *)recognizer;- (void)handleRotation:(UIRotationGestureRecognizer *)recognizer;- (void)handleTap:(UITapGestureRecognizer *)recognizer;- (void)handleLongPress:(UILongPressGestureRecognizer *)recognizer;- (void)handleSwipe:(UISwipeGestureRecognizer *)recognizer;- (void)handleCustomGestureRecognizer:(KMGestureRecognizer *)recognizer;- (void)bindPan:(UIImageView *)imgVCustom;- (void)bindPinch:(UIImageView *)imgVCustom;- (void)bindRotation:(UIImageView *)imgVCustom;- (void)bindTap:(UIImageView *)imgVCustom;- (void)bindLongPress:(UIImageView *)imgVCustom;- (void)bindSwipe;- (void)bingCustomGestureRecognizer;- (void)layoutUI;@end@implementation ViewController- (void)viewDidLoad {  [super viewDidLoad];    [self layoutUI];}- (void)didReceiveMemoryWarning {  [super didReceiveMemoryWarning];  // Dispose of any resources that can be recreated.}#pragma mark - 處理手勢(shì)操作/** * 處理拖動(dòng)手勢(shì) * * @param recognizer 拖動(dòng)手勢(shì)識(shí)別器對(duì)象實(shí)例 */- (void)handlePan:(UIPanGestureRecognizer *)recognizer {  //視圖前置操作  [recognizer.view.superview bringSubviewToFront:recognizer.view];    CGPoint center = recognizer.view.center;  CGFloat cornerRadius = recognizer.view.frame.size.width / 2;  CGPoint translation = [recognizer translationInView:self.view];  //NSLog(@"%@", NSStringFromCGPoint(translation));  recognizer.view.center = CGPointMake(center.x + translation.x, center.y + translation.y);  [recognizer setTranslation:CGPointZero inView:self.view];    if (recognizer.state == UIGestureRecognizerStateEnded) {    //計(jì)算速度向量的長(zhǎng)度，當(dāng)他小于200時(shí)，滑行會(huì)很短    CGPoint velocity = [recognizer velocityInView:self.view];    CGFloat magnitude = sqrtf((velocity.x * velocity.x) + (velocity.y * velocity.y));    CGFloat slideMult = magnitude / 200;    //NSLog(@"magnitude: %f, slideMult: %f", magnitude, slideMult); //e.g. 397.973175, slideMult: 1.989866        //基于速度和速度因素計(jì)算一個(gè)終點(diǎn)    float slideFactor = 0.1 * slideMult;    CGPoint finalPoint = CGPointMake(center.x + (velocity.x * slideFactor),                     center.y + (velocity.y * slideFactor));    //限制最小［cornerRadius］和最大邊界值［self.view.bounds.size.width - cornerRadius］，以免拖動(dòng)出屏幕界限    finalPoint.x = MIN(MAX(finalPoint.x, cornerRadius),              self.view.bounds.size.width - cornerRadius);    finalPoint.y = MIN(MAX(finalPoint.y, cornerRadius),              self.view.bounds.size.height - cornerRadius);        //使用 UIView 動(dòng)畫(huà)使 view 滑行到終點(diǎn)    [UIView animateWithDuration:slideFactor*2               delay:0              options:UIViewAnimationOptionCurveEaseOut             animations:^{               recognizer.view.center = finalPoint;             }             completion:nil];  }}/** * 處理捏合手勢(shì) * * @param recognizer 捏合手勢(shì)識(shí)別器對(duì)象實(shí)例 */- (void)handlePinch:(UIPinchGestureRecognizer *)recognizer {  CGFloat scale = recognizer.scale;  recognizer.view.transform = CGAffineTransformScale(recognizer.view.transform, scale, scale); //在已縮放大小基礎(chǔ)下進(jìn)行累加變化；區(qū)別于：使用 CGAffineTransformMakeScale 方法就是在原大小基礎(chǔ)下進(jìn)行變化  recognizer.scale = 1.0;}/** * 處理旋轉(zhuǎn)手勢(shì) * * @param recognizer 旋轉(zhuǎn)手勢(shì)識(shí)別器對(duì)象實(shí)例 */- (void)handleRotation:(UIRotationGestureRecognizer *)recognizer {  recognizer.view.transform = CGAffineTransformRotate(recognizer.view.transform, recognizer.rotation);  recognizer.rotation = 0.0;}/** * 處理點(diǎn)按手勢(shì) * * @param recognizer 點(diǎn)按手勢(shì)識(shí)別器對(duì)象實(shí)例 */- (void)handleTap:(UITapGestureRecognizer *)recognizer {  UIView *view = recognizer.view;  view.transform = CGAffineTransformMakeScale(1.0, 1.0);  view.transform = CGAffineTransformMakeRotation(0.0);  view.alpha = 1.0;}/** * 處理長(zhǎng)按手勢(shì) * * @param recognizer 點(diǎn)按手勢(shì)識(shí)別器對(duì)象實(shí)例 */- (void)handleLongPress:(UILongPressGestureRecognizer *)recognizer {  //長(zhǎng)按的時(shí)候，設(shè)置不透明度為0.7  recognizer.view.alpha = 0.7;}/** * 處理輕掃手勢(shì) * * @param recognizer 輕掃手勢(shì)識(shí)別器對(duì)象實(shí)例 */- (void)handleSwipe:(UISwipeGestureRecognizer *)recognizer {  //代碼塊方式封裝操作方法  void (^positionOperation)() = ^() {    CGPoint newPoint = recognizer.view.center;    newPoint.y -= 20.0;    _imgV.center = newPoint;        newPoint.y += 40.0;    _imgV2.center = newPoint;  };    //根據(jù)輕掃方向，進(jìn)行不同控制  switch (recognizer.direction) {    case UISwipeGestureRecognizerDirectionRight: {      positionOperation();      break;    }    case UISwipeGestureRecognizerDirectionLeft: {      positionOperation();      break;    }    case UISwipeGestureRecognizerDirectionUp: {      break;    }    case UISwipeGestureRecognizerDirectionDown: {      break;    }  }}/** * 處理自定義手勢(shì) * * @param recognizer 自定義手勢(shì)識(shí)別器對(duì)象實(shí)例 */- (void)handleCustomGestureRecognizer:(KMGestureRecognizer *)recognizer {  //代碼塊方式封裝操作方法  void (^positionOperation)() = ^() {    CGPoint newPoint = recognizer.view.center;    newPoint.x -= 20.0;    _imgV.center = newPoint;        newPoint.x += 40.0;    _imgV2.center = newPoint;  };    positionOperation();}#pragma mark - 綁定手勢(shì)操作/** * 綁定拖動(dòng)手勢(shì) * * @param imgVCustom 綁定到圖片視圖對(duì)象實(shí)例 */- (void)bindPan:(UIImageView *)imgVCustom {  UIPanGestureRecognizer *recognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self                                         action:@selector(handlePan:)];  [imgVCustom addGestureRecognizer:recognizer];}/** * 綁定捏合手勢(shì) * * @param imgVCustom 綁定到圖片視圖對(duì)象實(shí)例 */- (void)bindPinch:(UIImageView *)imgVCustom {  UIPinchGestureRecognizer *recognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self                                           action:@selector(handlePinch:)];  [imgVCustom addGestureRecognizer:recognizer];  //[recognizer requireGestureRecognizerToFail:imgVCustom.gestureRecognizers.firstObject];}/** * 綁定旋轉(zhuǎn)手勢(shì) * * @param imgVCustom 綁定到圖片視圖對(duì)象實(shí)例 */- (void)bindRotation:(UIImageView *)imgVCustom {  UIRotationGestureRecognizer *recognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self                                              action:@selector(handleRotation:)];  [imgVCustom addGestureRecognizer:recognizer];}/** * 綁定點(diǎn)按手勢(shì) * * @param imgVCustom 綁定到圖片視圖對(duì)象實(shí)例 */- (void)bindTap:(UIImageView *)imgVCustom {  UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self                                         action:@selector(handleTap:)];  //使用一根手指雙擊時(shí)，才觸發(fā)點(diǎn)按手勢(shì)識(shí)別器  recognizer.numberOfTapsRequired = 2;  recognizer.numberOfTouchesRequired = 1;  [imgVCustom addGestureRecognizer:recognizer];}/** * 綁定長(zhǎng)按手勢(shì) * * @param imgVCustom 綁定到圖片視圖對(duì)象實(shí)例 */- (void)bindLongPress:(UIImageView *)imgVCustom {  UILongPressGestureRecognizer *recognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];  recognizer.minimumPressDuration = 0.5; //設(shè)置最小長(zhǎng)按時(shí)間；默認(rèn)為0.5秒  [imgVCustom addGestureRecognizer:recognizer];}/** * 綁定輕掃手勢(shì)；支持四個(gè)方向的輕掃，但是不同的方向要分別定義輕掃手勢(shì) */- (void)bindSwipe {  //向右輕掃手勢(shì)  UISwipeGestureRecognizer *recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self                                           action:@selector(handleSwipe:)];  recognizer.direction = UISwipeGestureRecognizerDirectionRight; //設(shè)置輕掃方向；默認(rèn)是 UISwipeGestureRecognizerDirectionRight，即向右輕掃  [self.view addGestureRecognizer:recognizer];  [recognizer requireGestureRecognizerToFail:_customGestureRecognizer]; //設(shè)置以自定義撓癢手勢(shì)優(yōu)先識(shí)別    //向左輕掃手勢(shì)  recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self                              action:@selector(handleSwipe:)];  recognizer.direction = UISwipeGestureRecognizerDirectionLeft;  [self.view addGestureRecognizer:recognizer];  [recognizer requireGestureRecognizerToFail:_customGestureRecognizer]; //設(shè)置以自定義撓癢手勢(shì)優(yōu)先識(shí)別}/** * 綁定自定義撓癢手勢(shì)；判斷是否有三次不同方向的動(dòng)作，如果有則手勢(shì)結(jié)束，將執(zhí)行回調(diào)方法 */- (void)bingCustomGestureRecognizer {  //當(dāng) recognizer.state 為 UIGestureRecognizerStateEnded 時(shí)，才執(zhí)行回調(diào)方法 handleCustomGestureRecognizer:    //_customGestureRecognizer = [KMGestureRecognizer new];  _customGestureRecognizer = [[KMGestureRecognizer alloc] initWithTarget:self                                  action:@selector(handleCustomGestureRecognizer:)];  [self.view addGestureRecognizer:_customGestureRecognizer];}- (void)layoutUI {  //圖片視圖 _imgV  UIImage *img = [UIImage imageNamed:@"Emoticon_tusiji_icon"];  CGFloat cornerRadius = img.size.width;  _imgV = [[UIImageView alloc] initWithImage:img];  _imgV.frame = CGRectMake(20.0, 20.0,               cornerRadius * 2, cornerRadius * 2);  _imgV.userInteractionEnabled = YES;  _imgV.layer.masksToBounds = YES;  _imgV.layer.cornerRadius = cornerRadius;  _imgV.layer.borderWidth = 2.0;  _imgV.layer.borderColor = [UIColor grayColor].CGColor;  [self.view addSubview:_imgV];    //圖片視圖 _imgV2  img = [UIImage imageNamed:@"Emoticon_tusiji_icon2"];  cornerRadius = img.size.width;  _imgV2 = [[UIImageView alloc] initWithImage:img];  _imgV2.frame = CGRectMake(20.0, 40.0 + _imgV.frame.size.height,               cornerRadius * 2, cornerRadius * 2);  _imgV2.userInteractionEnabled = YES;  _imgV2.layer.masksToBounds = YES;  _imgV2.layer.cornerRadius = cornerRadius;  _imgV2.layer.borderWidth = 2.0;  _imgV2.layer.borderColor = [UIColor orangeColor].CGColor;  [self.view addSubview:_imgV2];      [self bindPan:_imgV];  [self bindPinch:_imgV];  [self bindRotation:_imgV];  [self bindTap:_imgV];  [self bindLongPress:_imgV];    [self bindPan:_imgV2];  [self bindPinch:_imgV2];  [self bindRotation:_imgV2];  [self bindTap:_imgV2];  [self bindLongPress:_imgV2];    //為了處理手勢(shì)識(shí)別優(yōu)先級(jí)的問(wèn)題，這里需先綁定自定義撓癢手勢(shì)  [self bingCustomGestureRecognizer];  [self bindSwipe];}@end