Alert swift IOs

alert.swift

//
//  ViewController.swift
//  spiner-alert
//
//  Created by Angelito Rojas on 25/10/14.
//  Copyright (c) 2014 Angelito Rojas. All rights reserved.
//

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    @IBAction func alert(sender: AnyObject) {
        var alert = UIAlertController(title: "Hi there", message: "are you sure?", preferredStyle: UIAlertControllerStyle.Alert)
        alert.addAction(UIAlertAction(title: "Ok", style: .Default, handler: { action in
            self.dismissViewControllerAnimated(true, completion: nil)
        }))
        self.presentViewController(alert, animated: true, completion: nil)
    }

}