IOS开发: 为UIImageView添加点击事件

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");
}

}

转载于:https://www.cnblogs.com/WenJim/p/4808204.html

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