title: Multiple view controllers with interface builder and an iPad
body: <p>I am trying to create an application that has a main screen and then three buttons that would allow the user to switch to an entirely different "context" (so I have another screen that does some rendering using opengl and another that will do something completely different to what the main screen does).</p>
  
  <p>My question is how do I create more than one view controller in interface builder and then how will I switch between the different view controllers? (I know this is not recommended by Apple but that is what I am trying to do)</p>
  
  <p>Thanks for any help :)</p>