title: Convert Audio to Base64 string in iOS + Swift
body: <pre><code>var fileLocation = NSString(string:NSBundle.mainBundle().pathForResource("test", ofType: "mp3")!)
  let plainData = fileLocation(NSUTF8StringEncoding)
  let base64String = plainData?.base64EncodedStringWithOptions(.allZeros)
  println(base64String!)
  </code></pre>