title: Detect Retina Display
body: <p>Does iOS SDK provides an easy way to check if the currentDevice has an high-resolution display (retina) ?</p>
  
  <p>The best way I've found to do it now is :</p>
  
  <pre><code>    if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)] == YES &amp;&amp; [[UIScreen mainScreen] scale] == 2.00) {
           // RETINA DISPLAY
      }
  </code></pre>