Question

I have a delegate, which recives a message to delete a item with that item as an argument.
I want to show a confirmation AlertView, and then, if the users press Yes, i want to delete it.

So, what I have is

The delegate method that gets called:

- (void) deleteRecording:aRecording(Recording*)aRecording {

     NSLog(@"Cancel recording extended view");
     UIAlertView *alert = [[UIAlertView alloc]
                      initWithTitle: NSLocalizedString(@"Cancel recording",nil)
                      message: NSLocalizedString(@"Are you sure you want to cancel the recording?",nil)
                      delegate: self
                      cancelButtonTitle: NSLocalizedString(@"No",nil)
                      otherButtonTitles: NSLocalizedString(@"Yes",nil), nil];
    [alert show];
    [alert release];

}

And the method thats checks which button has been pressed:

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

    switch (buttonIndex) {
        case 0:
        {
            NSLog(@"Delete was cancelled by the user");
        }
        break;

        case 1:
        {

            NSLog(@"Delete deleted by user");
        }


    }

}

So, my question is, how can i send the aRecording parameter from the first method to the second?

Thanks a lot

Answer 1

1. Store that variable in a member variable (easiest solution)

2. If you are only passing an int variable, you can set AlertView tag
   property.

    myAlertView.tag  = YOUR_INT;
   

3. According to the documentation,

   Note : The UIAlertView class is intended to be used as-is and does not support subclassing. The view hierarchy for this class is
   private
   and must not be modified.

   So please use the 3rd method only if you are not intending to submit
   app to app store. Thanks user soemarko ridwan for the tip.

   For passing complex objects, subclass UIAlertView, add an object
   property

   @interface CustomAlertView : UIAlertView
   @property (nonatomic, retain) id object;
   @end
   
   @implementation CustomAlertView
   @synthesize object;
   - (void)dealloc {
       [object release];
       [super dealloc];
   }
   @end
   

   When you create AlertView

    CustomAlertView *alert = [[CustomAlertView alloc]
                     initWithTitle: NSLocalizedString(@"Cancel recording",nil)
                     message: NSLocalizedString(@"Are you sure you want to cancel the recording?",nil)
                     delegate: self
                     cancelButtonTitle: NSLocalizedString(@"No",nil)
                     otherButtonTitles: NSLocalizedString(@"Yes",nil), nil];
   [alert setObject:YOUR_OBJECT];
   [alert show];
   [alert release];
   

   In the delegate

   - (void)alertView:(TDAlertView *)alertView didDismissWithButtonIndex:(NSInteger)buttonIndex {
        NSLog(@"%@", [alertView object]);
   }