title: How to access the parent view controller?
body: <p>I am using this code to push a view controller in <code>ViewControllerA</code>:</p>
  
  <pre><code>DatePickerViewController *viewController = [[DatePickerViewController alloc] initWithNibName:@"DatePickerViewController" bundle:nil];
  NSMutableArray *info = [[NSMutableArray alloc] initWithObjects:@"Exam Duration",nil];
  [viewController setInfo:info];
  [info release];
  [self.navigationController pushViewController:viewController animated:YES];
  [viewController release];
  </code></pre>
  
  <p>In the <code>DatePickerViewController</code> that is slid in, it has a text field. In <code>ViewControllerA</code> how can I get the value of this text field once the <code>viewWillDisappear</code> method is fired, it's to save data.</p>