title: Calling NSString method on a String in Swift
body: <p>Apple's Swift <a href="https://developer.apple.com/library/prerelease/ios/documentation/Swift/Conceptual/Swift_Programming_Language/StringsAndCharacters.html">documentation</a> states that </p>
  
  <blockquote>
    <p>If you are working with the Foundation framework in Cocoa or Cocoa Touch, the entire NSString API is available to call on any String value you create</p>
  </blockquote>
  
  <p>If I have a String object eg</p>
  
  <pre><code>var newString: String = "this is a string"
  </code></pre>
  
  <p>How do I perform NSString operations like <code>containsString</code> on my String var?</p>