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/**  基类UIGestureRecognizer  UITapGestureRecognizer        Tap 点击  UIPanGestureRecognizer        Pan (慢速滑动，拖移)  UILongPressGestureRecognizer  LongPress (长按)  UIPinchGestureRecognizer      Pinch （捏合，两手指往内或外拨动）  UIRotationGestureRecognizer   Rotation (旋转)  UISwipeGestureRecognizer        Swipe (快速滑动，轻扫)  */ #import "ViewController.h" #define kRandomValue (arc4random() %256 /256.0) @interface ViewController () <UIGestureRecognizerDelegate> @property (nonatomic,strong) UIImageView *imageView; @end @implementation ViewController - (void)viewDidLoad {     [super viewDidLoad];     //强烈不建议往一个控件上加很多手势     [self addImageView];     [self addTapGesture];//点击手势     //[self addPanGesture];//拖移手势     [self addLongPressGesture];//长按手势     [self addPinchGesture];//捏合     [self addResetButton];//重置     [self addRotationGesture];//旋转     [self addSwipeGesture];//轻扫 } -(void)addImageView{     UIImage *image=[UIImage imageNamed:@"cloth"];     self.imageView=[[UIImageView alloc] initWithImage:image];//这样写默认imageView的大小和image的大小一样     self.imageView.userInteractionEnabled=YES;//打开用户交互     self.imageView.center=self.view.center;     [self.view addSubview:self.imageView]; } -(void)addTapGesture{     UITapGestureRecognizer *tap=[[UITapGestureRecognizer alloc] init];     //tap.numberOfTapsRequired=2;//默认为1，点击次数     //tap.numberOfTouchesRequired=2;//默认为1，多少根手指触摸     [tap addTarget:self action:@selector(tap:)];     [self.imageView addGestureRecognizer:tap]; } -(void)tap:(UITapGestureRecognizer *)tap{     UIView *view=tap.view;     view.superview.backgroundColor=[UIColor colorWithRed:kRandomValue green:kRandomValue blue:kRandomValue alpha:1.0]; } -(void)addPanGesture{     UIPanGestureRecognizer *pan=[[UIPanGestureRecognizer alloc] init];     pan.delegate=self;     [pan addTarget:self action:@selector(pan:)];     [self.imageView addGestureRecognizer:pan]; } -(void)pan:(UIPanGestureRecognizer *)pan{     CGPoint offset=[pan                     translationInView:self.view];     CGPoint center=self.imageView.center;     center.x+=offset.x;     center.y+=offset.y;     self.imageView.center=center;          //不让其累加     [pan setTranslation:CGPointZero inView:self.view]; } -(void)addLongPressGesture{     UILongPressGestureRecognizer *longPress=[[UILongPressGestureRecognizer alloc ] init];     [longPress addTarget:self action:@selector(longPress:)];     [self.imageView addGestureRecognizer:longPress]; } -(void)longPress:(UILongPressGestureRecognizer *)longPress{     switch (longPress.state) {         case UIGestureRecognizerStateBegan:             NSLog(@"你长按了");             break;         case UIGestureRecognizerStateEnded:             NSLog(@"长按结束");             break;         default:             break;     } } -(void)addPinchGesture{     UIPinchGestureRecognizer *pinch=[[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)];     [self.imageView addGestureRecognizer:pinch]; } -(void)pinch:(UIPinchGestureRecognizer *)pinch{     NSLog(@"%lf",pinch.scale);     //捏合  scale缩放比例     //transform 变换，仿射变换/矩阵变换，     self.imageView.transform=CGAffineTransformScale(self.imageView.transform, pinch.scale, pinch.scale);     //重置捏合手势比例，每次都应该相对于当前的     pinch.scale=1;//下次相对比例应该从1开始 } -(void)addResetButton{     UIButton *button=[UIButton buttonWithType:UIButtonTypeSystem];     button.frame=CGRectMake(0, CGRectGetMaxY(self.imageView.frame)+60, 200, 40);     [button setTitle:@"Reset" forState:UIControlStateNormal];     [button addTarget:self action:@selector(reset:) forControlEvents:UIControlEventTouchUpInside];     [self.view addSubview:button]; } -(void)reset:(id)sender{     //恢复imageView的transform     self.imageView.transform=CGAffineTransformIdentity; } -(void)addRotationGesture{     UIRotationGestureRecognizer *rotation=[[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotation:)];     [self.imageView addGestureRecognizer:rotation]; } -(void)rotation:(UIRotationGestureRecognizer *)rotation{     NSLog(@"旋转弧度：%lf",rotation.rotation);     self.imageView.transform=CGAffineTransformRotate(self.imageView.transform, rotation.rotation);     rotation.rotation=0;//重置旋转弧度，相当于当前的从0开始 } -(void)addSwipeGesture{     UISwipeGestureRecognizer *swipe=[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];     //swipe默认的direction为right     swipe.direction=UISwipeGestureRecognizerDirectionUp;     [self.imageView addGestureRecognizer:swipe]; } -(void)swipe:(UISwipeGestureRecognizer *)swipe{     CGPoint center=self.imageView.center;     center.y -=50;     self.imageView.center=center; } #pragma mark -UIGestureRecognizerDelegate //是否支持多个手势 -(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{     return YES; } @end

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