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iOS开发之手势识别汇总

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
        }];
    }
}

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