title: How to convert an NSData into an NSString Hex string?
body: <p>When I call <code>-description</code> on an <code>NSData</code> object, I see a pretty Hex string of the <code>NSData</code> object's bytes like:</p>
  
  <pre><code>&lt;f6e7cd28 0fc5b5d4 88f8394b af216506 bc1bba86 4d5b483d&gt;
  </code></pre>
  
  <p>I'd like to get this representation of the data (minus the lt/gt quotes) into an in-memory <code>NSString</code> so I can work with it..  I'd prefer not to call <code>-[NSData description]</code> and then just trim the lt/gt quotes (because I assume that is not a guaranteed aspect of <code>NSData</code>'s public interface and is subject change in the future).  </p>
  
  <p>What's the simplest way to get this representation of an <code>NSData</code> object into an <code>NSString</code> object (other than calling <code>-description</code>)?</p>