iOS中 大多數控制元件都有tag值，但是手勢是不能新增tag值的，那麼我們運用的時候如何使用呢、、
比如
-(void)viewDidLoad
{

  UIImageView *image = [[UIImageView alloc]initWithFrame:CGRectMake(10, 10, imageWidth, imageWidth)];
image.layer.masksToBounds = YES;
image.layer.cornerRadius = imageWidth / 2;
image.userInteractionEnabled = YES;
image.tag = 109;
UITapGestureRecognizer *image9Tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(imageTapAction:)];
[image9 addGestureRecognizer:image9Tap];
[self.view addSubview:image9];
 

}
我們設定image的tag值是109，那麼我們要實現他的方法，該如何實現呢

-(void)imageTapAction:(id)sender
{

UITapGestureRecognizer *singleTap = (UITapGestureRecognizer *)sender;

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

  switch ([singleTap view].tag) {
    case 101:

        NSLog(@"image1...");

        break;
 default:
        break;
 

}
這樣我們就可以根據圖片的tag值做我們想做的事！！！