title: __OBJC__ in Objective-C
body: <p>What does <code>__OBJC__</code> mean in Objective-C?</p>
  <pre><code>#import &lt;Availability.h&gt;
  
  #ifdef __OBJC__
      #import &lt;Foundation/Foundation.h&gt;
      #import &lt;UIKit/UIKit.h&gt;
  #endif
  </code></pre>