手势

一、手势种类

• UITapGestureRecognizer  点击
• UIPinchGestureRecognizer 二指往内或往外拨动
• UIRotationGestureRecognizer 旋转
• UISwipeGestureRecognizer 滑动，快速移动
• UIPanGestureRecognizer 拖移，慢速移动
• UILongPressGestureRecognizer 长按

二、事件

   1、单击

   UITapGestureRecognizer* singleRecognizer;

    singleRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:selfaction:@selector(handleSingleTapFrom)];

    singleTapRecognizer.numberOfTapsRequired = 1; // 单击

    [self.view addGestureRecognizer:singleRecognizer];

  2、双击

    // 双击的 Recognizer

    UITapGestureRecognizer* double;

    doubleRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:selfaction:@selector(handleDoubleTapFrom)];

    doubleTapRecognizer.numberOfTapsRequired = 2; // 双击

    [self.view addGestureRecognizer:doubleRecognizer];

 

    // 关键在这一行，如果双击确定偵測失败才會触发单击

    [singleRecognizer requireGestureRecognizerToFail:doubleRecognizer];

 

3、二指往内或往外拨动

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

- (void)twoFingerPinch:(UIPinchGestureRecognizer *)recognizer
{
  NSLog(@"Pinch scale: %f", recognizer.scale);

}

 4、旋转

   UIRotationGestureRecognizer *rotationRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotate:)];
    [rotationRecognizer setDelegate:self];
    [self.view addGestureRecognizer:rotationRecognizer];