title: Present modal view controller from ECSlidingViewController
body: <p>In my app I have an <code>ECSlidingViewController</code> declared as initial root controller via <code>Storyboard</code>. In my AppDelegate's <code>didFinishLaunchingWithOptions</code> method, I instantiate it as above:</p>
  
  <pre><code>self.slidingController = [[UIStoryboard storyboardWithName:@"AppStoryboard" bundle:[NSBundle mainBundle]] instantiateViewControllerWithIdentifier:@"ECSlidingViewController"];
  </code></pre>
  
  <p>What I want is to be able to show a global modal view controller (eg. when a push notification arrives while the app is active) without knowing which controller is currently top in the sliding controller.</p>
  
  <p>What I do is (in my AppDelegate):</p>
  
  <pre><code>[self.slidingController.topViewController presentModalViewController:controller animated:YES];
  </code></pre>
  
  <p>but it doesn't seem to work.</p>
  
  <p>Is there any way I could present a modal controller from my sliding controller regardless which controller is topViewController?</p>
  
  <p>PS. If no, is there any chance that what I want will work with <code>SWRevealViewController</code> instead of <code>ECSlidingViewController</code>? If it's worth, I will take the painful road to switch.</p>
  
  <p>Thank you in advance!</p>