title: how to convert NSData UTF8 encoded data to UTF16
body: <p>I am receiving some data from my database its UTF8 encoded. I would like to know how to take this NSData thats UTF8 and re-encode it in UTF16?</p>
  
  <p>is there any way to do this? I know how to do it when passing a NSString to NSData </p>
  
  <pre><code>[@"myString" dataUsingEncoding:NSUTF16StringEncoding];
  </code></pre>
  
  <p>But I am not entirely sure how or if its even possible to do without having to put it into a string first...</p>
  
  <p>any help would be appreciated.</p>