title: Detect touch on whole screen
body: <p>I want to call a method whenever a specific UIViewController is touched.</p>
  
  <p><code>-touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event</code> is a method that does what I'm looking for, exept it doesn't detect a touch on neither the statur bar, navigation bar or toolbar. How can I make a method that runs everytime the UIViewController is touched? Or in other words, the whole screen?</p>