Swift - Initiate new view controller from AppDelegate

gistfile1.swift

// Name of storyboard, without the .storyboard extension
var storyboard = UIStoryboard(name: "Main", bundle: nil)

// The type is the view controller class name, in this case 'ViewControllerLaunch'
// You need to make sure the view controller in storyboard has an identifier set
// The identifier in this example is 'Launch'
var viewController: ViewControllerLaunch = storyboard.instantiateViewControllerWithIdentifier("Launch") as ViewControllerLaunch

// Show this view controller
window?.rootViewController = viewController
window?.makeKeyAndVisible()