title: IOS show UIViewController from addMessageFromRemoteNotification in AppDelegate
body: <p>How is it possible to show an <code>UIViewController</code> (which is not the first one in the navigation) from the <code>addMessageFromRemoteNotification</code> in the <code>AppDelegate</code>?</p>
  
  <p>I tried this: </p>
  
  <pre><code>UINavigationController *navigationController = (UINavigationController*)_window.rootViewController;
  ChatViewController *chatViewController = (ChatViewController*)[navigationController.viewControllers  objectAtIndex:1];
  </code></pre>
  
  <p>but it doesn't work, it allways shows the first <code>Viewcontroller</code> not the second one.</p>