iOS-手势详细参数说明

敲击手势

    // 创建一个UILabel用来做测试(可以根据实际需要自己替换)
    UILabel *demoLabel = [[UILabel alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];
    // 创建一个单击手势
    // 参数1.谁响应这个手势
    // 参数2.为手势点击添加一个方法
    UITapGestureRecognizer *tapFs = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapFs:)];
    // 将手势添加到视图上
    [demoLabel addGestureRecognizer:tapFs];
    // 设置敲击次数
    tapFs.numberOfTapsRequired = 1; //单击
    // 设置需要几根手指
    tapFs.numberOfTouchesRequired = 1;
    // 创建一个双击手势
    UITapGestureRecognizer *tapSe = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapSe:)];
    // 将手势添加到视图上
    [demoLabel addGestureRecognizer:tapSe];
    // 设置敲击次数
    tapSe.numberOfTapsRequired = 2;
    // 让单击手势仅在双击手势不成立时执行
    [tapFs requireGestureRecognizerToFail:tapSe];

-(void)tapGesture:(UITapGestureRecognizer *)tap{
    NSLog(@"单击了demoLabel");
}

-(void)twoTapGesture:(UITapGestureRecognizer *)tap{
    NSLog(@"双击了demoLabel");
}

长按手势

    // 创建长按手势
    UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
    // 将手势添加到视图上
    [demoLabel addGestureRecognizer:longPress];
    // 设置最小的触发时间
    longPress.minimumPressDuration = 3;//默认0.5s
    // 允许在长按时移动的最大范围,出范围,手势失效
    longPress.allowableMovement = 50;

-(void)longPress:(UILongPressGestureRecognizer *)longPress{
    
    //【注意】如果不做任何处理，长按手势添加的事件，在手势结束时再               次被触发
    //解决：对手势的状态进行判断，如果手势即将结束响应功能
    
    if (longPress.state == UIGestureRecognizerStateEnded) {
        NSLog(@"长按了demoLabel");
    }
    
}

滑动手势

// 创建滑动手势
    UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];
    [demoLabel addGestureRecognizer:swipe];
    /**滑动方向
     UISwipeGestureRecognizerDirectionRight
     UISwipeGestureRecognizerDirectionLeft
     UISwipeGestureRecognizerDirectionUp
     UISwipeGestureRecognizerDirectionDown
     */
    // 注意：一个手势只能监听一个方向
    swipe.direction = UISwipeGestureRecognizerDirectionRight;

    -(void)swipe:(UISwipeGestureRecognizer *)sw{
    switch (sw.direction) {
        case UISwipeGestureRecognizerDirectionRight:
            NSLog(@"向右滑动");
            break;
        case UISwipeGestureRecognizerDirectionLeft:
            NSLog(@"向左滑动");
            break;
        case UISwipeGestureRecognizerDirectionUp:
            NSLog(@"向上滑动");
            break;
        case UISwipeGestureRecognizerDirectionDown:
            NSLog(@"向下滑动");
            break;
            
        default:
            NSLog(@"没有响应");
            break;
    }
}

拖动手势

    // 创建拖动手势
    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGesture:)];
    [demoLabel addGestureRecognizer:pan];
    // 设置手指的范围(max最大,min最小)
    pan.maximumNumberOfTouches = 3;
    pan.minimumNumberOfTouches = 1;

//在拖动过程的每一时刻，都会调用这个方法
-(void)panGesture:(UIPanGestureRecognizer *)pan{
    //被拖动的视图相对于父视图原位置的位移
    CGPoint point = [pan translationInView:self.view];
    //设置新的中心位置
    demoLabel.center = CGPointMake(demoLabel.center.x + point.x, demoLabel.center.y + point.y);
    //重置被拖动的视图相对与父视图的位置
    [pan setTranslation:CGPointZero inView:self.view];
}

旋转手势

    //创建旋转手势
    UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationGesture:)];
    [demoLabel addGestureRecognizer:rotation];
    
//只要旋转就会调用该方法
-(void)rotationGesture:(UIRotationGestureRecognizer *)rotation{
    
    demoLabel.transform = CGAffineTransformRotate(demoLabel.transform, rotation.rotation);
    
    //重置旋转角度
    rotation.rotation = 0;
}

捏合手势

//    创建捏合手势
    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchGesture:)];
//    将手势添加到视图上
    [demoLabel addGestureRecognizer:pinch];

//只要发生捏合就会调用
-(void)pinchGesture:(UIPinchGestureRecognizer *)pinch{
    
    demoLabel.transform = CGAffineTransformScale(_label.transform, pinch.scale, pinch.scale);
    
    //重置比例
    pinch.scale = 1;
}

两种手势作用在同一个视图

//两种手势同时作用在一个视图上
    
    //创建旋转手势
    UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationGesture:)];
    rotation.delegate = self;
    [demoLabel addGestureRecognizer:rotation];
    
    
    //创建捏合手势
    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchGesture:)];
    pinch.delegate = self;
    //将手势添加到视图上
    [demoLabel addGestureRecognizer:pinch];

//只要旋转就会调用该方法
-(void)rotationGesture:(UIRotationGestureRecognizer *)rotation{
    
    demoLabel.transform = CGAffineTransformRotate(demoLabel.transform, rotation.rotation);
    
    //重置旋转角度
    rotation.rotation = 0;
}
//只要发生捏合就会调用
-(void)pinchGesture:(UIPinchGestureRecognizer *)pinch{
    
    demoLabel.transform = CGAffineTransformScale(demoLabel.transform, pinch.scale, pinch.scale);
    
    //重置比例
    pinch.scale = 1;
}

//如果同一个控件同时添加多个手势，每个手势都需要设置代理，原因是当手势冲突，可以再代理中判断当前是哪一个手势除法  避免冲突
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
    //当添加多个手势发现只能实现其中一个方法是，需要重写该代理方法，将返回值设为YES
    return YES;
}