手势UITapGestureRecognizer的tag

UITapGestureRecognizer是没有tag属性，但他有UIView的属性，我们可以通过给UIView添加tag属性，从而标记UITapGestureRecognizer。

 

UITapGestureRecognizer *singleTap =

        [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(whenClickImage:)];

        [_firstImage addGestureRecognizer:singleTap];

        UIView *singleTapView = [singleTap view];

        singleTapView.tag = 0;

        [singleTap release];

 

-(void)whenClickImage:(id)sender

{

    UITapGestureRecognizer *singleTap = (UITapGestureRecognizer *)sender;

    NSLog(@"%d",[singleTap view].tag]);

}

注：查看UIGestureRecognizer源码发现了问题，苹果已经给我们做了封装，获取他都父视图不是通过superview，而是在UIGestureRecognizer中声明了一个属性view，通过这个属性就可以获取它都父视图