Question

I am implementing an alert view after the user clicks on the ‘destructButton’ in an action sheet. Code snippet as below:

-(void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex
{
  if (buttonIndex != actionSheet.cancelButtonIndex)
  {
     UIAlertView *alert = [[UIAlertView alloc] 
     initWithTitle:@"Something happened!"
     message:nil
     delegate:nil
     cancelButtonTitle:@"Phew!"
     otherButtonTitles:nil];
  }

  [alert show];
  [alert release];
}

I have already included the UIActionSheetDelegate protocol in my .h file

@interface Control_FunViewController : UIViewController <UIActionSheetDelegate> {
    UITextField *nameField;
    UITextField *numberField;
    UILabel *sliderLabel;
    UISwitch *leftSwitch;
    UISwitch *rightSwitch;
    UIButton *doSomethingButton;

}

But when I click on the destructButton in the actionsheet, nothing happens. Am I missing something here?

Thanks

Zhen

Answer 1

Your delegate needs to implement actionSheet:clickedButtonAtIndex:.

Action sheet will be dismissed after actionSheet:clickedButtonAtIndex: and after that the delegate will receive actionSheet:didDismissWithButtonIndex: .

From Apple Action Sheet Delegate Protocol reference

… the delegate must implement the
actionSheet:clickedButtonAtIndex:
message to respond when those buttons
are clicked; otherwise, your custom
buttons do nothing. The action sheet
is automatically dismissed after the
actionSheet:clickedButtonAtIndex:
delegate method is invoked.

You can have a look at example projects that use UIActionSheet like GenericKeychain :

    // Action sheet delegate method.
    -      (void)actionSheet:(UIActionSheet *)actionSheet
        clickedButtonAtIndex:(NSInteger)buttonIndex
    {
        // the user clicked one of the OK/Cancel buttons
        if (buttonIndex == 0)
        {
            [passwordItem resetKeychainItem];
            [accountNumberItem resetKeychainItem];
            [self.tableView reloadData];
        }
    }