Init Functionality proposal for http://merowing.info/2015/11/swift-init/

Foo2.swift

class Foo2 {
  let controller: UIViewController = Foo2.setupController()
  let window: UIWindow = Foo2.setupWindow()
}

private extension Foo2 {
  static func setupController() -> UIViewController {
    return UIStoryboard(name: "Main", bundle: nil).instantiateInitialViewController()!
  }

  static func setupWindow() -> UIWindow {
    let window = UIWindow(frame: UIScreen.mainScreen().bounds)
    window.backgroundColor = UIColor.whiteColor()
    window.makeKeyAndVisible()
    return window
  }
}