title: Getting all value from NSDictionary (deeply)
body: <p>I have a dictionary like this :</p>
  
  <pre><code>&lt;dict&gt;
    &lt;key&gt;ThemeName&lt;/key&gt;
    &lt;string&gt;Theme1&lt;/string&gt;
    &lt;key&gt;AddToFavoritesButton&lt;/key&gt;
    &lt;dict&gt;
      &lt;key&gt;DownImage&lt;/key&gt;
      &lt;string&gt;heart_selected.png&lt;/string&gt;
      &lt;key&gt;UpImage&lt;/key&gt;
      &lt;string&gt;heart.png&lt;/string&gt;
   &lt;/dict&gt;
  &lt;dict&gt;
  </code></pre>
  
  <p>How to iterate all keys and getting all values in an array ?</p>
  
  <p>like this : </p>
  
  <pre><code>res[0] = Theme1
  res[1] = heart_selected.png
  res[2] = heart.png
  ...
  </code></pre>
  
  <p>Thanks</p>
  
  <p>Thierry</p>