关闭应用程序并再次打开然后 PopToRootViewController 不能在 swift firebase 中工作

Question

我是 Swift 新手。我正在开发应用程序。我正在使用 firebase 将用户注册并登录到我的应用程序中。 这是我的登录代码：-

@IBAction func onClickLogin(_ sender: Any)
{
    let email = Validation.shareValidator.isValidEmail(email: txtEmail.text, view: viewContainerEmail)
    let password = Validation.shareValidator.isValidPassword(password: txtPassword.text, view: viewContainerPassword)
    if email != "success"
    {
        CustomAlert.shareAlert.alertSetUp(title: "Email Field", subTitle: email, boldTitle: "Invalid Email")
    }
    else if password != "success"
    {
        CustomAlert.shareAlert.alertSetUp(title: "Password Field", subTitle: password, boldTitle: "Invalid Password")
    }
    else
    {
        Auth.auth().signIn(withEmail: txtEmail.text!, password: txtPassword.text!) { (result, error) in
            if error != nil
            {
                CustomAlert.shareAlert.alertSetUp(title: "Login Error", subTitle: error!.localizedDescription, boldTitle: "Login Error")
            }
            else
            {
                self.btnLogin.startAnimate(spinnerType: SpinnerType.circleStrokeSpin, spinnercolor: UIColor.white, spinnerSize: 20, complete: {
                    self.btnLogin.backgroundColor = UIColor.green

                    let defaults = UserDefaults.standard

                    defaults.set(true, forKey: "isLogin")
                    defaults.set(result?.user.uid, forKey: "uid")
                    defaults.set(self.txtEmail.text!, forKey: "email")
                    let vc = self.storyboard?.instantiateViewController(withIdentifier: "RootTabBarC") as! RootTabBarC
                    self.navigationController?.pushViewController(vc, animated: true)
                })
            }
        }

    }
}

这是我的注册码：-

@IBAction func onClickSignUp(_ sender: Any)
{
        Auth.auth().createUser(withEmail: txtEmail.text!, password: txtPassword.text!) { (result, error) in
            if error != nil
            {
                CustomAlert.shareAlert.alertSetUp(title: "Registration Error", subTitle: error!.localizedDescription, boldTitle: "Registration Error")
            }
            else
            {
                let uid = result?.user.uid
                let ref = Database.database().reference(withPath: "user").child(uid!)
                ref.setValue(["name" : self.txtName.text!, "email" : self.txtEmail.text!, "password" : self.txtPassword.text!, "mobile" : "", "recipeExpert" : "", "bio" : "", "profileImage" : ""])

                self.btnSignUp.startAnimate(spinnerType: SpinnerType.circleStrokeSpin, spinnercolor: UIColor.white, spinnerSize: 20, complete: {
                    self.btnSignUp.backgroundColor = UIColor.green

                    let defaults = UserDefaults.standard

                    defaults.set(true, forKey: "isLogin")
                    defaults.set(result?.user.uid, forKey: "uid")
                    defaults.set(self.txtEmail.text!, forKey: "email")
                    let vc = self.storyboard?.instantiateViewController(withIdentifier: "RootTabBarC") as! RootTabBarC
                    self.navigationController?.pushViewController(vc, animated: true)
                })
          }          
}

这是我的注销代码：-

@IBAction func onClickLogOut(_ sender: Any)
{
    do
    {
        try Auth.auth().signOut()

        UserDefaults.standard.removeObject(forKey: "isLogin")
        UserDefaults.standard.removeObject(forKey: "uid")
        UserDefaults.standard.removeObject(forKey: "email")
        UserDefaults.standard.synchronize()

    }
    catch let err
    {
        print(err.localizedDescription)
    }

    let appDel = UIApplication.shared.delegate as! AppDelegate
    let vc = storyboard?.instantiateViewController(identifier: "LoginSignUpVC") as? LoginSignUpVC
    let navVc = UINavigationController(rootViewController: vc!)
    appDel.window?.rootViewController = navVc
    appDel.window?.makeKeyAndVisible()

    self.parent?.navigationController?.popToRootViewController(animated: true)

}

当我运行我的应用程序时它工作正常，但是当我在模拟器上关闭我的应用程序最近选项卡并再次打开并尝试注销但它不会回到我的 LoginSignUpVc 根视图控制器。 self.parent?.navigationController?.popToRootViewController(animated: true)

肯定有问题

任何帮助将不胜感激，谢谢。

Answer 1

当您再次打开应用时，您的根视图控制器就是您的 tabbBar。 您正在使用登录视图更改 root。在根视图中更改根视图并弹出到新根对我来说很奇怪。请制作一个新的故事板用于登录和注册。并在删除 userDefaults 后调用此代码

let storyboard = UIStoryboard(name: "Authentication", bundle: Bundle.main)
        let viewController = storyboard.instantiateInitialViewController()

        if let viewController = viewController {
            self.present(viewController, animated: true, completion: nil)
        }

您可以检查 appDelegate 中的 userDefaults 和午餐正确的故事板。

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    self.window = UIWindow(frame: UIScreen.main.bounds)
    // check your userdefaults and change this codes for loged in user
    let storyboard = UIStoryboard(name: "Authentication", bundle: nil)

    let initialViewController = storyboard.instantiateViewController(withIdentifier: "LoginSignupVC")
    //
    self.window?.rootViewController = initialViewController
    self.window?.makeKeyAndVisible()

    return true
}

不要忘记为视图控制器设置故事板 ID