title: Xcode WARNING: Unused Entity Issue: Unused Variable
body: <p>I'm working on this tutorial application and the code is giving me this warning: </p>
  
  <blockquote>
    <p>Xcode WARNING: Unused Entity Issue: Unused Variable</p>
  </blockquote>
  
  <p>It's giving the error when executing this statement:</p>
  
  <pre><code>int newRowIndex = [self.checklist.items count];
  </code></pre>
  
  <p>What's causing it? Which steps should I take to resolve this?</p>