gistfile1.txt

1:
class ViewController: UIViewController {
    override func loadView() {
        view = NSBundle.mainBundle().loadNibNamed("View", owner: self, options: nil).first! as UIView
    }
}

2:
class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        view.addSubview(NSBundle.mainBundle().loadNibNamed("View", owner: self, options: nil).first! as UIView)
    }
}