title: Get the UIAlertController from UIAlertAction?
body: <p>I want to call a function rather than use a closure with a UIAlertAction. Is it possible to get a reference to the UIAlertController that owns the UIAlertAction? </p>
  
  <pre><code>alert = UIAlertController(title: "City", message: "Enter a city name", preferredStyle: UIAlertControllerStyle.Alert)
  UIAlertActionStyle.Default, handler: okAlert)
  
  //...
  
  func okAlert(action: UIAlertAction) {
      // Get to alert here from action?
  }
  </code></pre>