title: How to convert String to NSUUID in Swift?
body: <p>I am developing iOS Swift.</p>
  <p>I have convert the <code>NSUUID</code> to <code>String</code> like the following:</p>
  <pre><code>var bdAddr: NSUUID?
  var text: String = bdAddr!.UUIDString
  </code></pre>
  <p>But how to convert <code>String</code> to <code>NSUUID</code> in Swift?</p>