title: Short hand for [[UIApplication sharedApplication] delegate]?
body: <p>I stored global variables in my AppDelegate and access them by:</p>
  
  <pre><code>AppDelegate *d = [[UIApplication sharedApplication] delegate];
  d.someString = ...
  </code></pre>
  
  <p>What's the recommend way to save some typing and so I don't need to <code>AppDelegate *d = [[UIApplication sharedApplication] delegate];</code> again and again? Thanks!</p>