Ios 导航控制器从今天起变为零

我有一个today扩展，其中有一个启动应用程序的按钮，当从该按钮启动应用程序时，导航控制器变为零

我不知道为什么会这样

这是我在appdelegate中的代码：

func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
    var storyBoard: UIStoryboard!
    var mainViewController: MainViewController!
    self.window = UIWindow(frame: UIScreen.main.bounds)
    if UserDefaults.getLanguage() == "ar" {
        storyBoard = UIStoryboard(name: "MainAR", bundle: nil)
    } else {
        storyBoard = UIStoryboard(name: "Main", bundle: nil)
    }

    let viewController = storyBoard.instantiateViewController(withIdentifier: "swRevealController") as! SWRevealViewController
    mainViewController = storyBoard.instantiateViewController(withIdentifier: "mainView") as! MainViewController
    self.window?.rootViewController = viewController
    self.window?.makeKeyAndVisible()

    viewController.setFront(mainViewController, animated: true)


    if url.scheme == "open"
    {
        switch url.host
        {
        case "1"?:
            mainViewController.isTaxi = true
            break
        case "2"?:
           mainViewController.isPfp = true
            break
        case "3"?:
           mainViewController.isDarbi = true
            break
        default:
            break
        }
    }
    return true
}

---

任何人都可以帮忙吗？

这是因为这行代码编写了故事板导航

self.window?.rootViewController = viewController

您必须将其嵌入这样的导航中

self.window?.rootViewController = UINavigationController(rootViewController: viewController) 

编辑：在这一行之前初始化isTaxi

mainViewController.isTaxi = // set it to true / false 
viewController.setFront(mainViewController, animated: true)

//

---

你在哪里设置导航控制器？我没有在这里设置，当我通过扩展中的按钮打开应用程序时，应用程序按预期启动。但在应用程序内部，我有一个按钮，它使用导航控制器按下另一个viewcontroller。由于导航控制器为零。我不工作。使用self.window？.rootViewController=UINavigationController（rootViewController:mainViewController）注释不用于扩展讨论；这段对话已经结束。

func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
    var storyBoard: UIStoryboard!
    var mainViewController:MainViewController!
    self.window = UIWindow(frame: UIScreen.main.bounds)
    if UserDefaults.getLanguage() == "ar" {
        storyBoard = UIStoryboard(name: "MainAR", bundle: nil)
    } else {
        storyBoard = UIStoryboard(name: "Main", bundle: nil)
    }

    mainViewController = storyBoard.instantiateViewController(withIdentifier: "mainView") as! MainViewController

    if url.scheme == "open"
    {
        switch url.host
        {
        case "1"?:
            mainViewController.isTaxi = true
            break
        case "2"?:
           mainViewController.isPfp = true
            break
        case "3"?:
           mainViewController.isDarbi = true
            break
        default:
            break
        }
    }

    let viewController = storyBoard.instantiateViewController(withIdentifier: "swRevealController") as! SWRevealViewController
    viewController.setFront(mainViewController, animated: true)
    self.window?.rootViewController = UINavigationController(rootViewController: viewController)
    self.window?.makeKeyAndVisible()


    return true
}