title: ExtJS 4.2.1 - Cannot get View instance from the controller
body: <p>In my app I have the viewport with one item, a main view, which it is a simple class extending from Ext.container.Container.</p>
  
  <p>I have a main controller too, and I'm trying to get the view instance, so dynamically I can push the corresponding items if the user is logged or not.</p>
  
  <p>I've tried using views: ['MainView'], refs[ { selector: 'thextype' }], etc with no luck.</p>
  
  <p>I was using the reference (ref) in sencha touch to do this kind of things, can you help me with Extjs v4.2 ?</p>
  
  <p>Just for clarification, I'm not trying to get the DOM element, I'm trying to get the view instance with the associated methods.</p>
  
  <p>Thanks in advance,</p>