iOS开发中六种手势UITapGestureRecogniz

最新推荐文章于 2020-10-10 09:34:16 发布

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#ios #ios开发 #手势识别 #UITapGestu

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本文介绍了iOS开发中的六种手势识别：轻击、长按、轻扫、捏合、拖动和旋转，详细解析了每种手势的用法。

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iOS开发中六种手势UITapGestureRecognizer
- iOS开发中手势识别有六种

iOS开发中六种手势UITapGestureRecognizer

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:)];
//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
        }];
    }
}