UIAlertViewDelegate和更多警报窗口

Question

我有控制器实现UIAlertViewDelegate.在实施中,我有:

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

方法.当我创建UIAlertView时,我将'委托'放到'self'中,它运行正常.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？

Answer 1

UIAlertView是一个UIView子类,因此有标签属性可用于区分它们:

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
     }
}