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");

    }

}