title: How do I access my Objective-C constants in Swift?
body: <p>My project currently has a file containing many constants that I use in a variety of places throughout my codebase. I'm writing a class extension in swift and need to access some of these constants.</p>
  
  <p>I have something like this defining my constants in Objective-C:</p>
  
  <pre><code>//
  //  AppConstants.h
  //
  
  #import &lt;Foundation/Foundation.h&gt;
  
  @interface AppConstants : NSObject
  
  extern NSString *const SOME_CONSTANT_IN_APP_CONSTANTS;
  
  @end
  </code></pre>
  
  <p>I've added my AppConstants.h to the bridging header, but when I try and do:</p>
  
  <pre><code>someDictionary.objectForKey(PROPERTY_CALL_CAMPUS_SECURITY_TITLE)
  </code></pre>
  
  <p>I get:</p>
  
  <p><code>Use of unresolved identifier 'PROPERTY_CALL_CAMPUS_SECURITY_TITLE'</code></p>
  
  <p>Is there a way to access constants defined in Objective-C in my Swift code?</p>