iOS 手势

妖狐艹你老母 2022-03-22 10:52 270阅读 0赞

**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
            }];
        }
    }