title: App opens to specific ViewController inside Navigation Controller
body: <p>I'm trying to have my app open to a specific ViewController that is deeply embedded in a Navigation Controller, but isn't the RootViewController. I have tried in the app delegate didFinishLaunchingWithOptions adding:</p>
  
  <pre><code>  self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let initialViewController = storyboard.instantiateViewControllerWithIdentifier("NavViewController")
    self.window?.rootViewController = initialViewController
    self.window?.makeKeyAndVisible() 
  </code></pre>
  
  <p>But this goes to the root view controller. I tried changing this line to:</p>
  
  <pre><code>storyboard.instantiateViewControllerWithIdentifier("MainViewController")
  </code></pre>
  
  <p>and this <strong>does</strong> open to the correct viewcontroller but then there is no Navigation Bar on the top which is needed to navigate in the app.</p>