title: Swift - Saving highscore using NSUserDefaults
body: <p>I'm using Swift to make a game. I want to save the users high score using NSUserDefaults. I know how to create a new NSUserDefaults variable in my AppDelegate file:</p>
  
  <pre><code>let highscore: NSUserDefaults = NSUserDefaults.standardUserDefaults()
  </code></pre>
  
  <p>But how do I set/get this in my view controllers?</p>