title: Category Not Recognizing Ivars
body: <p>I have quite a large View Controller in my app and I want to clean it up by separating some of the functions into categories. I read up on how to implement a category and have:</p>
  
  <pre><code>#import "StatsVC.h"
  
  @interface StatsVC (TableViewDelegate)
  
  @end
  </code></pre>
  
  <p>As my .h (the category is called StatsVC+TableViewDelegate).
  and my Implemation starts like this:</p>
  
  <pre><code>@implementation StatsVC (TableViewDelegate)
  </code></pre>
  
  <p>Several times in the category, I access variables which are iVars of the original class.I have read and supposedly this is allowed, but for every use of an iVar in the category I get this error message:</p>
  
  <p><code>'Use of undeclared identifier 'iVar'</code></p>
  
  <p>Does anybody know why this is happening?</p>
  
  <p>Thanks,</p>