title: Add image into UIAlertController in swift
body: <p>I want to have a simple UIAlertController with image in it. what should I do?</p>
  
  <pre><code>let alertMessage = UIAlertController(title: "Service Unavailable", message: "Please retry later", preferredStyle: .Alert)
                  alertMessage.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
                  self.presentViewController(alertMessage, animated: true, completion: nil)
  </code></pre>