iOS开发各种手势识别
jopen
8年前
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）,
使用手势很简单，分为两步：
创建手势实例。当创建手势时，指定一个回调方法，当手势开始，改变、或结束时，回调方法被调用。
添加到需要识别的View中。每个手势只对应一个View，当屏幕触摸在View的边界内时，如果手势和预定的一样，那就会回调方法。
1，点击手势（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，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 }]; } } 4，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 }
5，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 } } 6，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) { self.View.transform = CGAffineTransformMakeScale(gesture.scale, gesture.scale); } }