title: Getting total number of enum items
body: <p>Is it possible to get the total number of items defined by an enum at runtime?</p>
  
  <p>While it's pretty much the same question as <a href="https://stackoverflow.com/questions/856154/total-number-of-items-defined-in-an-enum">this one</a>, that question relates to C#, and as far as I can tell, the method provided there won't work in Objective-C.</p>