title: iOS Extension and accessing files in Resource
body: <p>Suppose I have a file data.txt in the Resource bundle of an extension (not the Resource bundle of the application). How do I access it? I have tried:</p>
  
  <pre><code>NSString *filePath = [[NSBundle mainBundle] pathForResource:@"data" ofType:@"txt"];
  </code></pre>
  
  <p>But it returns nil.</p>