UIAlertViewDelegate和更多警报窗口

问题描述

我有控制器实现UIAlertViewDelegate。在实现中我有：

I have controller which implements UIAlertViewDelegate. In implementation I have:

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex

方法。当我创建UIAlertView时，我将'委托'设置为'self'并且它工作正常。但问题是，现在我还有一个警报视图，我希望每个视图都有不同的行为。那么如何检查哪个alertView发送消息？

method. When I create UIAlertView I put for 'delegate' to 'self' and it works fine. But problem is that now I have one more alert views and I want different behaviors for each of them. So how to check which alertView send message?

推荐答案

UIAlertView是一个UIView子类，因此有标签属性可以用来区分他们：

UIAlertView is a UIView subsclass and so has tag property you can use to differentiate between them:

UIAlertView *alert1 = ... //Create alert
alert1.tag = kActionTag1;
//show alert

...

UIAlertView *alert2 = ... //Create alert
alert2.tag = kActionTag2;
//show alert

然后在委托方法中：

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
     if (alertView.tag == kActionTag1){
          // Perform 1st action
     }
     if (alertView.tag == kActionTag1){
          // Perform 2nd action
     }
}

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