title: How to change UIAlertController button text colour in iOS9?
body: <p>The question is similar to <a href="https://stackoverflow.com/questions/25795065/ios-8-uiactivityviewcontroller-and-uialertcontroller-button-text-color-uses-wind">iOS 8 UIActivityViewController and UIAlertController button text color uses window&#39;s tintColor</a> but in iOS 9.</p>
  
  <p>I have a UIAlertController and the dismiss button keeps white colour even I have tried to set </p>
  
  <pre><code>[[UIView appearanceWhenContainedIn:[UIAlertController class], nil] setTintColor:[UIColor blackColor]];
  
  UIAlertController *strongController = [UIAlertController alertControllerWithTitle:title
                                                               message:message
                                                        preferredStyle:preferredStyle];
  strongController.view.tintColor = [UIColor black];
  </code></pre>