title: Parse for iOS: How to create custom Facebook button?
body: <p>Instead of using the Facebook-branded login button in the ParseUI LogIn View, I want to implement my own custom button with a different layout. </p>
  
  <p>How to create custom Facebook button, so that the user could log in in background and then return to the app?</p>
  
  <p>The goals is to have on my screen only my logo and the Facebook LogIn button. The logIn process should be managed through Parse.</p>