双击手势屏蔽单击手势

#pragma  mark - 添加Tab手势
-(void)createTabGR{

    //创建一个Tab点击手势
    //发生点击后调用本类的tap方法,把tgr传入
    UITapGestureRecognizer * tgr = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap:)];
    //默认敲击次数为 1
    //所有的UIview的子类视图都可以添加手势
    //把手势添加到图片视图上
    [_imageView addGestureRecognizer:tgr];
    
    //添加双击手势
    UITapGestureRecognizer * doubletgr = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(doubleTap:)];
    //设置敲击次数为2
    doubletgr.numberOfTapsRequired = 2;
    
    [_imageView addGestureRecognizer:doubletgr];
    
    //设置满足双击的情况下不触发单机
    [tgr requireGestureRecognizerToFail:doubletgr];

}

//单次手势事件
-(void)tap:(UITapGestureRecognizer *)tgr{
    //手势所在的视图
    //UIView * view = tgr.view;
    NSLog(@"图片被单击了...");
}

//双击手势事件
-(void)doubleTap:(UITapGestureRecognizer *)doubletgr{
    NSLog(@"图片被双击了...");
}