IOS開發: 為UIImageView添加點擊事件

標籤：

轉載於：http://www.pocketdigi.com/20140218/1276.html

UIImageView並不像UIButton一樣，點點滑鼠就可以關聯點擊事件，也不像Android裡有onClickListener，這裡需要藉助於UITapGestureRecognizer類。從類名上就可以看出，這個類就是用於處理tap(單擊)事件的。
bbc和voaspecial是UIImageView對象

[bbc setUserInteractionEnabled:YES];    [voaspecial setUserInteractionEnabled:YES];    [bbc addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(clickCategory:)]];    [voaspecial addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(clickCategory:)]];

經測試，多個UIImageView不能共用一個UITapGestureRecognizer對象，之前調用的會沒效果。
根據點擊的view判斷來自誰的點擊。

-(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");    }  }

 

IOS開發: 為UIImageView添加點擊事件