gistfile1.txt

// Begin navigation when navigation button is tapped
@objc func startNavigation(sender: UIButton) {

    let options = NavigationRouteOptions(coordinates: points)
    options.profileIdentifier = .automobile

    Directions.shared.calculate(options) { (waypoints, routes, error) in
        guard let route = routes?.first, error == nil else {
            print(error!.localizedDescription)
            return
        }

        let navigationController = NavigationViewController(for: route)

        self.present(navigationController, animated: true, completion: nil)
    }
}