iOS开发中六种手势UITapGestureRecognizer
iOS开发中手势分别有六种：
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:)];
//点击次数
tapGesture.numberOfTapsRequired = 1;
//点击手指数
tapGesture.numberOfTouchesRequired = 1;
//把tapGesture（手势）添加到对应的view
[self.view addGestureRecognizer:tapGesture];
//轻击手势触发方法
-(void)tapGesture:(UITapGestureRecognizer *)sender
{
//your code
}
2，长按手势（LongPressGesRecognizer）
UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressGesture:)];
//设置长按时间
longPressGesture.minimumPressDuration = 0.5;
//把tapGesture（手势）添加到对应的view
[self.view addGestureRecognizer:longPressGesture];
//长按手势触发方法
-(void)longPressGesture:(id)sender
{
//监听长按的状态
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 向右
swipeGesture.direction = UISwipeGestureRecognizerDirectionRight;
//把tapGesture（手势）添加到对应的view
[self.view addGestureRecognizer:swipeGesture];
UISwipeGestureRecognizer *swipeGestureLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)];
//设置轻扫的方向 向左
swipeGestureLeft.direction = UISwipeGestureRecognizerDirectionLeft;
//把tapGesture（手势）添加到对应的view
[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:)];
//把tapGesture（手势）添加到对应的view
[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:^{
//取消一切形变
_imageView.transform = CGAffineTransformIdentity;
}];
}
}
5，拖动手势（PanGestureRecognizer）
UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGesture:)];
//把tapGesture（手势）添加到对应的view
[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）
高亮代码
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
}];
}
}
