IOS 七种手势操作（拖动、捏合、旋转、点按、长按、轻扫、自定义）详解及实例代码

- (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;//以上方法在分类 UIGestureRecognizer (UIGestureRecognizerProtected) 中声明，更多方法声明请自行查看

typedef NS_ENUM(NSInteger, UIGestureRecognizerState) {  UIGestureRecognizerStatePossible,  // 尚未识别是何种手势操作（但可能已经触发了触摸事件），默认状态  UIGestureRecognizerStateBegan,   // 手势已经开始，此时已经被识别，但是这个过程中可能发生变化，手势操作尚未完成  UIGestureRecognizerStateChanged,  // 手势状态发生转变  UIGestureRecognizerStateEnded,   // 手势识别操作完成（此时已经松开手指）  UIGestureRecognizerStateCancelled, // 手势被取消，恢复到默认状态  UIGestureRecognizerStateFailed,   // 手势识别失败，恢复到默认状态  UIGestureRecognizerStateRecognized = UIGestureRecognizerStateEnded // 手势识别完成，同UIGestureRecognizerStateEnded};

#import <UIKit/UIKit.h>typedef NS_ENUM(NSUInteger, Direction) {  DirectionUnknown,  DirectionLeft,  DirectionRight};@interface KMGestureRecognizer : UIGestureRecognizer@property (assign, nonatomic) NSUInteger tickleCount; //挠痒次数@property (assign, nonatomic) CGPoint currentTickleStart; //当前挠痒开始坐标位置@property (assign, nonatomic) Direction lastDirection; //最后一次挠痒方向@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]; //设置当前挠痒开始坐标位置}- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {  //『当前挠痒开始坐标位置』和『移动后坐标位置』进行 X 轴值比较，得到是向左还是向右移动  UITouch *touch = [touches anyObject];  CGPoint tickleEnd = [touch locationInView:self.view];  CGFloat tickleSpacing = tickleEnd.x - _currentTickleStart.x;  Direction currentDirection = tickleSpacing < 0 ? DirectionLeft : DirectionRight;    //移动的 X 轴间距值是否符合要求，足够大  if (ABS(tickleSpacing) >= kMinTickleSpacing) {    //判断是否有三次不同方向的动作，如果有则手势结束，将执行回调方法    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(@"自定义手势成功，将执行回调方法");      }    }  }}- (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 - 处理手势操作/** * 处理拖动手势 * * @param recognizer 拖动手势识别器对象实例 */- (void)handlePan:(UIPanGestureRecognizer *)recognizer {  //视图前置操作  [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) {    //计算速度向量的长度，当他小于200时，滑行会很短    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计算一个终点    float slideFactor = 0.1 * slideMult;    CGPoint finalPoint = CGPointMake(center.x + (velocity.x * slideFactor),                     center.y + (velocity.y * slideFactor));    //限制最小［cornerRadius］和最大边界值［self.view.bounds.size.width - cornerRadius］，以免拖动出屏幕界限    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 动画使 view 滑行到终点    [UIView animateWithDuration:slideFactor*2               delay:0              options:UIViewAnimationOptionCurveEaseOut             animations:^{               recognizer.view.center = finalPoint;             }             completion:nil];  }}/** * 处理捏合手势 * * @param recognizer 捏合手势识别器对象实例 */- (void)handlePinch:(UIPinchGestureRecognizer *)recognizer {  CGFloat scale = recognizer.scale;  recognizer.view.transform = CGAffineTransformScale(recognizer.view.transform, scale, scale); //在已缩放大小基础下进行累加变化；区别于：使用 CGAffineTransformMakeScale 方法就是在原大小基础下进行变化  recognizer.scale = 1.0;}/** * 处理旋转手势 * * @param recognizer 旋转手势识别器对象实例 */- (void)handleRotation:(UIRotationGestureRecognizer *)recognizer {  recognizer.view.transform = CGAffineTransformRotate(recognizer.view.transform, recognizer.rotation);  recognizer.rotation = 0.0;}/** * 处理点按手势 * * @param recognizer 点按手势识别器对象实例 */- (void)handleTap:(UITapGestureRecognizer *)recognizer {  UIView *view = recognizer.view;  view.transform = CGAffineTransformMakeScale(1.0, 1.0);  view.transform = CGAffineTransformMakeRotation(0.0);  view.alpha = 1.0;}/** * 处理长按手势 * * @param recognizer 点按手势识别器对象实例 */- (void)handleLongPress:(UILongPressGestureRecognizer *)recognizer {  //长按的时候，设置不透明度为0.7  recognizer.view.alpha = 0.7;}/** * 处理轻扫手势 * * @param recognizer 轻扫手势识别器对象实例 */- (void)handleSwipe:(UISwipeGestureRecognizer *)recognizer {  //代码块方式封装操作方法  void (^positionOperation)() = ^() {    CGPoint newPoint = recognizer.view.center;    newPoint.y -= 20.0;    _imgV.center = newPoint;        newPoint.y += 40.0;    _imgV2.center = newPoint;  };    //根据轻扫方向，进行不同控制  switch (recognizer.direction) {    case UISwipeGestureRecognizerDirectionRight: {      positionOperation();      break;    }    case UISwipeGestureRecognizerDirectionLeft: {      positionOperation();      break;    }    case UISwipeGestureRecognizerDirectionUp: {      break;    }    case UISwipeGestureRecognizerDirectionDown: {      break;    }  }}/** * 处理自定义手势 * * @param recognizer 自定义手势识别器对象实例 */- (void)handleCustomGestureRecognizer:(KMGestureRecognizer *)recognizer {  //代码块方式封装操作方法  void (^positionOperation)() = ^() {    CGPoint newPoint = recognizer.view.center;    newPoint.x -= 20.0;    _imgV.center = newPoint;        newPoint.x += 40.0;    _imgV2.center = newPoint;  };    positionOperation();}#pragma mark - 绑定手势操作/** * 绑定拖动手势 * * @param imgVCustom 绑定到图片视图对象实例 */- (void)bindPan:(UIImageView *)imgVCustom {  UIPanGestureRecognizer *recognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self                                         action:@selector(handlePan:)];  [imgVCustom addGestureRecognizer:recognizer];}/** * 绑定捏合手势 * * @param imgVCustom 绑定到图片视图对象实例 */- (void)bindPinch:(UIImageView *)imgVCustom {  UIPinchGestureRecognizer *recognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self                                           action:@selector(handlePinch:)];  [imgVCustom addGestureRecognizer:recognizer];  //[recognizer requireGestureRecognizerToFail:imgVCustom.gestureRecognizers.firstObject];}/** * 绑定旋转手势 * * @param imgVCustom 绑定到图片视图对象实例 */- (void)bindRotation:(UIImageView *)imgVCustom {  UIRotationGestureRecognizer *recognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self                                              action:@selector(handleRotation:)];  [imgVCustom addGestureRecognizer:recognizer];}/** * 绑定点按手势 * * @param imgVCustom 绑定到图片视图对象实例 */- (void)bindTap:(UIImageView *)imgVCustom {  UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self                                         action:@selector(handleTap:)];  //使用一根手指双击时，才触发点按手势识别器  recognizer.numberOfTapsRequired = 2;  recognizer.numberOfTouchesRequired = 1;  [imgVCustom addGestureRecognizer:recognizer];}/** * 绑定长按手势 * * @param imgVCustom 绑定到图片视图对象实例 */- (void)bindLongPress:(UIImageView *)imgVCustom {  UILongPressGestureRecognizer *recognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];  recognizer.minimumPressDuration = 0.5; //设置最小长按时间；默认为0.5秒  [imgVCustom addGestureRecognizer:recognizer];}/** * 绑定轻扫手势；支持四个方向的轻扫，但是不同的方向要分别定义轻扫手势 */- (void)bindSwipe {  //向右轻扫手势  UISwipeGestureRecognizer *recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self                                           action:@selector(handleSwipe:)];  recognizer.direction = UISwipeGestureRecognizerDirectionRight; //设置轻扫方向；默认是 UISwipeGestureRecognizerDirectionRight，即向右轻扫  [self.view addGestureRecognizer:recognizer];  [recognizer requireGestureRecognizerToFail:_customGestureRecognizer]; //设置以自定义挠痒手势优先识别    //向左轻扫手势  recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self                              action:@selector(handleSwipe:)];  recognizer.direction = UISwipeGestureRecognizerDirectionLeft;  [self.view addGestureRecognizer:recognizer];  [recognizer requireGestureRecognizerToFail:_customGestureRecognizer]; //设置以自定义挠痒手势优先识别}/** * 绑定自定义挠痒手势；判断是否有三次不同方向的动作，如果有则手势结束，将执行回调方法 */- (void)bingCustomGestureRecognizer {  //当 recognizer.state 为 UIGestureRecognizerStateEnded 时，才执行回调方法 handleCustomGestureRecognizer:    //_customGestureRecognizer = [KMGestureRecognizer new];  _customGestureRecognizer = [[KMGestureRecognizer alloc] initWithTarget:self                                  action:@selector(handleCustomGestureRecognizer:)];  [self.view addGestureRecognizer:_customGestureRecognizer];}- (void)layoutUI {  //图片视图 _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];    //图片视图 _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];    //为了处理手势识别优先级的问题，这里需先绑定自定义挠痒手势  [self bingCustomGestureRecognizer];  [self bindSwipe];}@end