title: How could I copy __NSCFArray into swift array
body: <p>I have a swift array</p>
  
  <pre><code>var items: [String] = []
  </code></pre>
  
  <p>How to deep copy a  <code>__NSCFArray</code> arry into <code>items</code></p>
  
  <p>Thanks</p>