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转载于：http://www.pocketdigi.com/20140218/1276.html
UIImageView并不像UIButton一样，点点鼠标就可以关联点击事件，也不像Android里有onClickListener，这里需要借助于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。
bbc和voaspecial是UIImageView对象
[bbc setUserInteractionEnabled:YES];
[voaspecial setUserInteractionEnabled:YES];
[bbc addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(clickCategory:)]];
[voaspecial 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。
-(void)clickCategory:(UITapGestureRecognizer *)gestureRecognizer { NSLog(@"click"); NSLog(@"%hhd",[gestureRecognizer isMemberOfClass:[UITapGestureRecognizer class]]); UIView *viewClicked=[gestureRecognizer view]; if (viewClicked==bbc) { NSLog(@"bbc"); }else if(viewClicked==voaspecial) { NSLog(@"voaspecial"); } }
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原文地址：http://www.cnblogs.com/WenJim/p/4808204.html
