迅速-導航欄在離開屏幕后消失，然后返回

Question

我在NewHomePageVC （ NewHomePageVc是通過編程制作的VC）中啟動我的應用程序，並且它顯示了導航欄，然后我單擊SignInVc （ SigninVC是用Storyboard制作的，並且是UITableviewController ）注銷，然后重新登錄並返回到NewHomePageVC時間沒有導航欄？

在AppDelegate中：

  FIRApp.configure()
    window = UIWindow(frame: UIScreen.main.bounds)
    window?.makeKeyAndVisible()
    window?.rootViewController = UINavigationController(rootViewController: NewHomePageVC())

    return true

在NewHomePageVC中：

import UIKit

class NewHomePageVC: UITableViewController{

    var signInVC: SignInVC?
    var userScreenVC: usersScreenVC?
    var chatLogController: ChatLogController?
    var NewHomePage_Vc: NewHomePageVC?

    override func viewDidLoad() {
    super.viewDidLoad()


    func SetUpNavBarButtons(){

    }

    func SetUpNavBarButtons(){

        // navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Logout", style: .plain, target: self, action: #selector(handleLogout))

        let logOutButton = UIBarButtonItem(title: "Logout", style: .plain, target: self, action: #selector(handleLogout))

        let toUserScreenGrape = UIImage(named: "Grape Small Image")?.withRenderingMode(.alwaysOriginal)

        let toUserScreenGrapeButton = UIBarButtonItem(image: toUserScreenGrape, style: .plain, target: self, action: #selector(didTapUserScreenButton))

        let buttonsRight : NSArray = [toUserScreenGrapeButton]

        navigationItem.rightBarButtonItems = buttonsRight as? [UIBarButtonItem]
    }

    func didTapUserScreenButton() {
        let user_screen_vc = usersScreenVC()
        let navController = UINavigationController(rootViewController: user_screen_vc)
        present(navController, animated: true, completion: nil)

    }
}

Answer 1

問題最終出現在SignInVC內部

我變了

self.present(NewHomePage_VC, animated: true, completion: nil)

至

let editorViewController = NewHomePageVC()
let navEditorViewController: UINavigationController = UINavigationController(rootViewController: editorViewController)

self.present(navEditorViewController, animated: true, completion: nil)