iOS:UIImageView添加点击事件

UIImageView并不像UIButton那样点击鼠标就可以关联点击事件，也不像Android里有onClickListener，这个时 候就需要借助UITapGestureRecognizer类，从类名上就可以看出，这个类就是用于处理tap(单击)事件的。

创建两个UIImageView对象,imageView1和imageView2

1. [imageView1 setUserInteractionEnabled:YES];
2. [imageView2 setUserInteractionEnabled:YES];
3. [imageView1 addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(clickCategory:)]];
4. [imageView2 addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(clickCategory:)]];

经测试，多个UIImageView不能共用一个UITapGestureRecognizer对象，之前调用的会没效果。
根据点击的view判断来自谁的点击

1. -(void)clickCategory:(UITapGestureRecognizer *)gestureRecognizer
2. {
3. NSLog(@"click");
4. NSLog(@"%hhd",[gestureRecognizer isMemberOfClass:[UITapGestureRecognizer class]]);
6. UIView *viewClicked=[gestureRecognizer view];
7. if (viewClicked==imageView1) {
8. NSLog(@"imageView1");
9. }else if(viewClicked==imageView2)
10. {
11. NSLog(@"imageView2");
12. }
14. }

这样就ok了