title: I get a null class with NSClassFromString
body: <p>I have the same code shared by 2 apps, and depending on the current app a different class is used.</p>
  
  <p>className is the string which can be "PrefixClass1" or "PrefixClass2" (and it is correct for both apps, I've checked in the debugger).</p>
  
  <p>However currentClass is null for app2. (It perfectly works for app1)</p>
  
  <pre><code>NSString *className = [NSString stringWithFormat:@"Prefix%@", [[NSApp delegate] applicationName]];
  Class currentClass = NSClassFromString(className);
  </code></pre>
  
  <p>This means is null right ? <a href="http://cl.ly/AYSn" rel="nofollow">http://cl.ly/AYSn</a></p>
  
  <p>thanks</p>