gistfile1.m

- (IBAction)buttonPressed:(id)sender {
    UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:@"Are you sure?"
                                                             delegate:self
                                                    cancelButtonTitle:@"No Way!"
                                               destructiveButtonTitle:@"Yes, I'm sure!"
                                                    otherButtonTitles: nil];
    [actionSheet showInView:self.view];
}

- (void)actionSheet:(UIActionSheet *)actionSheet
    didDismissWithButtonIndex:(NSInteger)buttonIndex
{
    if (buttonIndex != [actionSheet cancelButtonIndex]) {
        NSString *msg = nil;
        
        if (nameField.text.length > 0)
            msg = [[NSString alloc] initWithFormat:
               @"You can breathe easy %@, everything went OK.", nameField.text];
        else
            msg = @"You can breathe easy %@, everything went OK.";
        
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Something was done"
                                                        message:msg
                                                       delegate:self
                                              cancelButtonTitle:@"Phew"
                                              otherButtonTitles:nil];
        [alert show];
    }
}