ViewController 1

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) → Bool {

// Initialize the window
window = UIWindow.init(frame: UIScreen.main.bounds)

// Set Background Color of window
window?.backgroundColor = UIColor.whiteColor()

// Allocate memory for an instance of the 'MainViewController' class
let mainViewController = MainViewController()

// Set the root view controller of the app's window
window!.rootViewController = mainViewController

// Make the window visible
window!.makeKeyAndVisible()

  return true
}

import UIKit

class MainViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.
}

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

/*
// MARK: - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    // Get the new view controller using segue.destinationViewController.
    // Pass the selected object to the new view controller.
}
*/

}