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iOS开发中六种手势识别
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 }]; } }
iOS开发中六种手势识别
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