Gesture 基本用法汇总

1.轻击手势（TapGestureRecognizer）的添加

初始化代码TapGestureRecongnizer的代码如下：

//新建tap手势 
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesture:)]; 
//设置点击次数和点击手指数 
tapGesture.numberOfTapsRequired = 1; //点击次数 
tapGesture.numberOfTouchesRequired = 1; //点击手指数 
[self.view addGestureRecognizer:tapGesture]; 

在回调方法中添加相应的业务逻辑：

//轻击手势触发方法 
-(void)tapGesture: (id)sender 
{ //轻击后要做的事情
}

2.长按手势（LongPressGestureRecognizer）

初始化代码

//添加长摁手势 
UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressGesture:)]; 
//设置长按时间 
longPressGesture.minimumPressDuration = 0.5; //(2秒) 
[self.view addGestureRecognizer:longPressGesture]; 
在对应的回调方法中添加相应的方法（当手势开始时执行）：
 
//常摁手势触发方法 
-(void)longPressGesture:(id)sender 
{ 
UILongPressGestureRecognizer *longPress = sender; 
if (longPress.state == UIGestureRecognizerStateBegan) 
{ 
 
UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@“提示” message:@“长按触发” delegate:nil cancelButtonTitle:@“取消” otherButtonTitles: nil]; 
[alter show]; 
} 
}

代码说明：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）

在初始化轻扫手势的时候得指定轻扫的方向，上下左右。 如果要要添加多个轻扫方向，就得添加多个轻扫手势，不过回调的是同一个方法。
添加轻扫手势，一个向左一个向右，代码如下：

1 //添加轻扫手势 
2 UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)]; 
3 //设置轻扫的方向 
4 swipeGesture.direction = UISwipeGestureRecognizerDirectionRight; //默认向右 
5 [self.view addGestureRecognizer:swipeGesture]; 
 
 
7 //添加轻扫手势 
8 UISwipeGestureRecognizer *swipeGestureLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)]; 
9 //设置轻扫的方向 
10 swipeGestureLeft.direction = UISwipeGestureRecognizerDirectionLeft; //默认向右 
11 [self.view addGestureRecognizer:swipeGestureLeft];

回调方法如下：

//轻扫手势触发方法 
-(void)swipeGesture:(id)sender 
{ 
UISwipeGestureRecognizer *swipe = sender; 
if (swipe.direction == UISwipeGestureRecognizerDirectionLeft) 
{ 
//向左轻扫做的事情 
} 
if (swipe.direction == UISwipeGestureRecognizerDirectionRight) 
{ 
 //向右轻扫做的事情 
} 
} 

4.捏合手势（PinchGestureRecognizer）

捏合手势初始化

//添加捏合手势 
2 UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchGesture:)]; 
3 [self.view addGestureRecognizer:pinchGesture]; 
捏合手势要触发的方法（放大或者缩小图片）：
 
 ////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）

拖动手势的初始化

//添加拖动手势 
UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGesture:)]; 
[self.view addGestureRecognizer:panGesture]; 

拖动手势要做的方法（通过translationInView获取移动的点，和TouchesMoved方法类似）

//拖动手势 
-(void) panGesture:(id)sender 
{ 
UIPanGestureRecognizer *panGesture = sender; 

CGPoint movePoint = [panGesture translationInView:self.view]; 

//做你想做的事儿 
} 

6.旋转手势（RotationGestureRecognizer）

旋转手势的初始化

//添加旋转手势 
 UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationGesture:)]; 
 [self.view addGestureRecognizer:rotationGesture]; 

旋转手势调用的方法：

1 //旋转手势 
-(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 
}]; 
} 

}