Question

I have a Navigation Controller and when I press the back button I don’t want to pop the view but I want to show an UIAlertView.I just want to pop the view after having make a choice on the UIAlertView!
How can I do?
I tried to catch the event ‘back button pressed’ but with no results 🙁

Answer 1

Create a UIBarButtonItem inside viewDidload and added it to the navigation bar

UIBarButtonItem *backButton=[[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStyleBordered target:self action:@selector(backButtonClicked)];
self.navigationItem.leftBarButtonItem=backButton;

create a method which will be called when the backButton is clicked

-(void)backButtonClicked{
       UIAlertView *alert=[[UIAlertView alloc] initWithTitle:@"Pop View!" message:@"Are you sure?" delegate:self cancelButtonTitle:@"No" otherButtonTitles:@"Yes", nil];
       [alert show];
}

write this UIAlertView delegate method which will be called when the button in the UIAlertView is clicked

-(void)alertView:(UIAlertView *)alertView willDismissWithButtonIndex:(NSInteger)buttonIndex{
      if (buttonIndex==1) {
             [self.navigationController popViewControllerAnimated:YES];
      }
}

NOTE: Dont forget to add UIAlertView delegate in the header file <UIAlertViewDelegate>