#import
<objc/runtime.h>
//objc_setAssociatedObject需要四个参数:源对象,关键字,关联的对象和一个关联策略。
objc_setAssociatedObject(button,
buttonKey, _imgView,
OBJC_ASSOCIATION_RETAIN_NONATOMIC);
- (void)buttonPress:(UIButton
*)sender//headButton点击
{
UIImageView
*imageView =
objc_getAssociatedObject(sender,buttonKey);
}
guan