iOS開發中六種手勢識別

iOS開發中手勢識別有六種：

輕擊手勢（TapGestureRecognizer）,

輕掃手勢 （SwipeGestureRecognizer）,

長按手勢（LongPressGestureRecognizer）,

拖動手勢（PanGestureRecognizer）,

捏合手勢（PinchGestureRecognizer）,

旋轉手勢（RotationGestureRecognizer）,

1，輕擊手勢（TapGestureRecognizer）

UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesture:)];
tapGesture.numberOfTapsRequired = 1; //點擊次數
tapGesture.numberOfTouchesRequired = 1; //點擊手指數
[self.view addGestureRecognizer:tapGesture];

//輕擊手勢觸發方法
-(void)tapGesture:(UITapGestureRecognizer *)sender
{
    //your code
}</pre> 
2，長按手勢（LongPressGestureRecognizer） 

UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressGesture:)];
//設置長按時間
longPressGesture.minimumPressDuration = 0.5;
[self.view addGestureRecognizer:longPressGesture];
//長按手勢觸發方法
-(void)longPressGesture:(id)sender
{
     UILongPressGestureRecognizer *longPress = sender;
     if (longPress.state == UIGestureRecognizerStateBegan)
     {
         //your code
     }
}
說明：長按手勢的常用狀態如下
開始：UIGestureRecognizerStateBegan
改變：UIGestureRecognizerStateChanged
結束：UIGestureRecognizerStateEnded
取消：UIGestureRecognizerStateCancelled
失敗：UIGestureRecognizerStateFailed
 
3，輕掃手勢（SwipeGestureRecognizer） 

UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)];
//設置輕掃的方向
swipeGesture.direction = UISwipeGestureRecognizerDirectionRight; //向右
[self.view addGestureRecognizer:swipeGesture];
UISwipeGestureRecognizer *swipeGestureLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)];
//設置輕掃的方向
swipeGestureLeft.direction = UISwipeGestureRecognizerDirectionLeft; //向左
[self.view addGestureRecognizer:swipeGestureLeft];
//輕掃手勢觸發方法
-(void)swipeGesture:(id)sender
{
    UISwipeGestureRecognizer *swipe = sender;
    if (swipe.direction == UISwipeGestureRecognizerDirectionLeft)
    {
        //向左輕掃
    }
    if (swipe.direction == UISwipeGestureRecognizerDirectionRight)
    {
        //向右輕掃
    }
}
 
4，捏合手勢（PinchGestureRecognizer） 

UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchGesture:)];
[self.view addGestureRecognizer:pinchGesture];
    ////捏合手勢觸發方法
-(void) pinchGesture:(id)sender
{
    UIPinchGestureRecognizer *gesture = sender;
    //手勢改變時
    if (gesture.state == UIGestureRecognizerStateChanged)
    {
         //捏合手勢中scale屬性記錄的縮放比例
        _imageView.transform = CGAffineTransformMakeScale(gesture.scale, gesture.scale);
    }
    //結束后恢復
    if(gesture.state==UIGestureRecognizerStateEnded)
    {
        [UIView animateWithDuration:0.5 animations:^{
            _imageView.transform = CGAffineTransformIdentity;//取消一切形變
        }];
    }
}
 
5，拖動手勢（PanGestureRecognizer） 

UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGesture:)];
[self.view addGestureRecognizer:panGesture];

//拖動手勢觸發方法
-(void) panGesture:(id)sender
{
    UIPanGestureRecognizer *panGesture = sender;
    CGPoint movePoint = [panGesture translationInView:self.view];
    //your code
}</pre> 
6，旋轉手勢（RotationGestureRecognizer） 

UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationGesture:)];
[self.view addGestureRecognizer:rotationGesture];
//旋轉手勢觸發方法
-(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;//取消形變
        }];
    }
}
 
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原文 http://www.superqq.com/blog/2015/01/14/ioskai-fa-zhi-shou-shi-shi-bie-hui-zo