title: Swift programmatically navigate to another view controller/scene
body: <p>I'm using following code to programmatically navigate to another ViewController. It works fine, but it some how hides the <code>navigation bar</code>. <strong>How do I fix this?</strong> (the navigation bar is created by embeding the <code>ViewController</code> in the <code>navigation controller</code> if that matters.)</p>
  
  <pre><code>let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)
  
  let nextViewController = storyBoard.instantiateViewControllerWithIdentifier("nextView") as NextViewController
  self.presentViewController(nextViewController, animated:true, completion:nil)
  </code></pre>