title: Custom UIResponder subclass
body: <p>Is it possible to set up a custom <code>UIResponder</code> subclass? I need to implement a listener for <code>UIEvent</code>s (specifically remote control events) that will be delivered through out the course of the app's lifecycle.</p>
  
  <p>I am trying to avoid using <code>UIViewController</code>s (will be dealloced at some point) and <code>AppDelegate</code> (would like to not burden it if possible) if possible.</p>