/*

 Copyright (C) 2017 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 The application delegate class.

 */

import UIKit

@UIApplicationMain

class AppDelegate: UIResponder, UIApplicationDelegate, UINavigationControllerDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]?) -> Bool {

        (window!.rootViewController as! UINavigationController).delegate = self

        return true

    }

    // MARK: - UINavigationControllerDelegate

    /**  

     *  Force the navigation controller to defer to the topViewController for

     *  its supportedInterfaceOrientations.  This allows some of the demos

     *  to rotate into landscape while keeping the rest in portrait.

     */

    func navigationControllerSupportedInterfaceOrientations(_ navigationController: UINavigationController) -> UIInterfaceOrientationMask {

        return navigationController.topViewController!.supportedInterfaceOrientations

    }

}