title: How to do class constants in Objective-C?
body: <p>Is there a way to use something like</p>
  
  <pre><code>if (carRecord.status == CarRecord.statusRepaired) {  // using a class constant
      // ...
  }
  </code></pre>
  
  <p>such as in a car repair shop, the <code>carRecord</code> object's state <code>status</code> is checked against the <code>CarRecord</code> class's constant.  In Objective-C, is there such a way?</p>