Question

I have two UIAlertViews in same view controller and I want to use the delegate method

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

This method will get called when a button in an alert view is pressed. However both alert views will call the same method.

How can I different the two alert views?

Answer 1

Set the tag property to different values when you display the alert. It’s just an integer and can be queried in the callback/delegate method.

Here’s an example (using an ActionSheet rather than an AlertView, but the principle is exactly the same):

UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@'Title'                                                          delegate:self                                                 cancelButtonTitle:@'Cancel'                                            destructiveButtonTitle:nil                                                 otherButtonTitles:@'Some option', nil]; actionSheet.actionSheetStyle = UIActionSheetStyleDefault; actionSheet.tag = 10; [actionSheet showInView:self.view]; [actionSheet release]; 

Then in your selector:

-(void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {   switch (actionSheet.tag) {     case 10:       // do stuff       break;     case 20:       // do other stuff       break;   } } 

Of course, you’d use constants rather than literal values, localised strings, etc, but that’s the basic idea.