title: How to get the index of item selected in Alert of UIAlertController Swift
body: <p>I am going to use UIAlertController for a user to select one item.
  The items to select are array  as following:</p>
  
  <pre><code>let arraySelect = ["NewYork", "Washington", "Seoul", "Tokyo", "Peking", "Sidney", ... ]
  
     let alert = UIAlertController(title: nil, message: nil, preferredStyle: .Alert)
  
          // Add items in array to Alert
          for var i = 0; i &lt; arraySelect.count; i++ {
              alert.addAction(UIAlertAction(title: arrayBibleVersions[i], style: .Default, handler: {(_) in }))
          }
  
          // Add cancel button.    
          alert.addAction(UIAlertAction(title: "취소", style: .Cancel, handler: {(_) in }))
  
          self.presentViewController(alert, animated: false, completion: nil)
  </code></pre>
  
  <p>When a user touched one item, I have to get the index of the item that a user toched on.
  But I don't know how to get the index..
  Please help me.</p>