Question

I have two UIAlertViews with ok/cancel buttons.

I catch the user response by:

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

The question I’m having is, which alertView is currently open?
I have different actions to do when clicking ok/cancel on each one…

Answer 1

You have several options:

• Use ivars. When creating the alert view:

  myFirstAlertView = [[UIAlertView alloc] initWith...];
  [myFirstAlertView show];
  // similarly for the other alert view(s).
  

  And in the delegate method:

  - (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
      if (alertView == myFirstAlertView) {
          // do something.
      } else if (alertView == mySecondAlertView) {
          // do something else.
      }
  }
  

• Use the tag property of UIView:

  #define kFirstAlertViewTag 1
  #define kSecondAlertViewTag 2
  

  UIAlertView *firstAlertView = [[UIAlertView alloc] initWith...];
  firstAlertView.tag = kFirstAlertViewTag;
  [firstAlertView show];
  // similarly for the other alert view(s).
  

  - (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
      switch (alertView.tag) {
          case kFirstAlertViewTag:
              // do something;
              break;
          case kSecondAlertViewTag:
              // do something else
              break;
      }
  }
  

• Subclass UIAlertView and add a userInfo property. This way you can add an identifier to your alert views.

  @interface MyAlertView : UIAlertView
  @property (nonatomic) id userInfo;
  @end
  

  myFirstAlertView = [[MyAlertView alloc] initWith...];
  myFirstAlertView.userInfo = firstUserInfo;
  [myFirstAlertView show];
  // similarly for the other alert view(s).
  

  - (void)alertView:(UIAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
      if (alertView.userInfo == firstUserInfo) {
          // do something.
      } else if (alertView.userInfo == secondUserInfo) {
          // do something else.
      }
  }