&tag(UIKit/ダイアログとアクションシート);
let alertConroller = UIAlertController(
title: "タイトル",
message: "メッセージ",
preferredStyle: UIAlertControllerStyle.Alert
)
alertConroller.addAction(UIAlertAction(title:"OK", style:UIAlertActionStyle.Default, handler: nil))
presentViewController(alertConroller, animated: true, completion: nil)