Sample.swift

@UIApplicationMain

class AppDelegate: UIResponder, UIApplicationDelegate {

   var window: UIWindow?

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

       let rootViewController = MainTableViewController()

       self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
       self.window?.rootViewController = rootViewController
       self.window?.makeKeyAndVisible()

       return true
   }