UIAlertController
let alertController:UIAlertController = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.Alert)
alertController.addAction( UIAlertAction(title: cancelTitle, style: UIAlertActionStyle.Cancel, handler: { (action:UIAlertAction) in

} )
)
alertController.addAction( UIAlertAction(title: okTitle, style: UIAlertActionStyle.Default, handler: { (action:UIAlertAction) in

} )
)
self.presentViewController(alertController, animated: true, completion: { 
    
})