title: Overriding methods using categories in Objective-C
body: <p>Can I use a class category to override a method that is already implemented using a category? Like this:</p>
  
  <p>1) Original method </p>
  
  <pre><code>-(BOOL) method {
    return true;
  }
  </code></pre>
  
  <p>2) Overrided method </p>
  
  <pre><code>-(BOOL) method {
    NSLog(@"error?"); 
    return true; 
  }
  </code></pre>
  
  <p>Will this work, or is this illegal?</p>