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iOS开发

iOS开发中手势识别有六种：

轻击手势（TapGestureRecognizer）,

轻扫手势（SwipeGestureRecognizer）,

长按手势（LongPressGestureRecognizer）,

拖动手势（PanGestureRecognizer）,

捏合手势（PinchGestureRecognizer）,

旋转手势（RotationGestureRecognizer）,

1，轻击手势（TapGestureRecognizer）

UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesture:)]; tapGesture.numberOfTapsRequired = 1; //点击次数 tapGesture.numberOfTouchesRequired = 1; //点击手指数 [self.view addGestureRecognizer:tapGesture];  //轻击手势触发方法 -(void)tapGesture:(UITapGestureRecognizer *)sender {     //your code }

2，长按手势（LongPressGestureRecognizer）

UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressGesture:)]; //设置长按时间 longPressGesture.minimumPressDuration = 0.5; [self.view addGestureRecognizer:longPressGesture]; //长按手势触发方法 -(void)longPressGesture:(id)sender {   UILongPressGestureRecognizer *longPress = sender;   if (longPress.state == UIGestureRecognizerStateBegan)   {    //your code   } } 说明：长按手势的常用状态如下 开始：UIGestureRecognizerStateBegan 改变：UIGestureRecognizerStateChanged 结束：UIGestureRecognizerStateEnded 取消：UIGestureRecognizerStateCancelled 失败：UIGestureRecognizerStateFailed

3，轻扫手势（SwipeGestureRecognizer）

UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)]; //设置轻扫的方向 swipeGesture.direction = UISwipeGestureRecognizerDirectionRight; //向右 [self.view addGestureRecognizer:swipeGesture]; UISwipeGestureRecognizer *swipeGestureLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)]; //设置轻扫的方向 swipeGestureLeft.direction = UISwipeGestureRecognizerDirectionLeft; //向左 [self.view addGestureRecognizer:swipeGestureLeft]; //轻扫手势触发方法 -(void)swipeGesture:(id)sender {  UISwipeGestureRecognizer *swipe = sender;  if (swipe.direction == UISwipeGestureRecognizerDirectionLeft)  {   //向左轻扫  }  if (swipe.direction == UISwipeGestureRecognizerDirectionRight)  {   //向右轻扫  } }

4，捏合手势（PinchGestureRecognizer）

UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchGesture:)]; [self.view addGestureRecognizer:pinchGesture];  ////捏合手势触发方法 -(void) pinchGesture:(id)sender {  UIPinchGestureRecognizer *gesture = sender;  //手势改变时  if (gesture.state == UIGestureRecognizerStateChanged)  {    //捏合手势中scale属性记录的缩放比例   _imageView.transform = CGAffineTransformMakeScale(gesture.scale, gesture.scale);  }  //结束后恢复  if(gesture.state==UIGestureRecognizerStateEnded)  {   [UIView animateWithDuration:0.5 animations:^{    _imageView.transform = CGAffineTransformIdentity;//取消一切形变   }];  } }

5，拖动手势（PanGestureRecognizer）

UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGesture:)]; [self.view addGestureRecognizer:panGesture];  //拖动手势触发方法 -(void) panGesture:(id)sender {     UIPanGestureRecognizer *panGesture = sender;     CGPoint movePoint = [panGesture translationInView:self.view];     //your code }

6，旋转手势（RotationGestureRecognizer）

UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationGesture:)]; [self.view addGestureRecognizer:rotationGesture]; //旋转手势触发方法 -(void)rotationGesture:(id)sender {  UIRotationGestureRecognizer *gesture = sender;  if (gesture.state==UIGestureRecognizerStateChanged)  {   _imageView.transform=CGAffineTransformMakeRotation(gesture.rotation);  }  if(gesture.state==UIGestureRecognizerStateEnded)  {   [UIView animateWithDuration:1 animations:^{    _imageView.transform=CGAffineTransformIdentity;//取消形变   }];  } }

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