override func viewDidLoad() {
    super.viewDidLoad()
    let gesture = UITapGestureRecognizer(target: self, action: "showMenu:")
    view.addGestureRecognizer(gesture)
}

func showMenu(sender: UITapGestureRecognizer) {

    var buttons = [ALRadialMenuButton]()

    ...
    /// create buttons
  ...

    ALRadialMenu()
        .setButtons(buttons)
        .setAnimationOrigin(sender.locationInView(view))
        .presentInView(view)
}