title: how can i get NibName of viewcontroller while not using storyboard
body: <p>I'm trying to implement a page menu  in my app using the pod from <a href="https://github.com/PageMenu/PageMenu" rel="nofollow noreferrer">this pre-built page menu pod from github</a></p>
  
  <p>In the instructions, it says:</p>
  
  <pre><code>var controller : UIViewController = UIViewController(nibName:"controllerNibName", bundle: nil)
  controller.title = "SAMPLE TITLE"
  controllerArray.append(controller)
  </code></pre>
  
  <p>things are all set up but i need only "controllerNibName". I am not using storyboard. And haven't made any xib file yet  with viewController. so how can i get the NibName of viewController. </p>