Question

我是Swift的新手。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。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)
                })
            }
        }

    }
}

这是我的注册代码：-

@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，它可以正常运行，但是当我关闭我的应用程序在模拟器上的“最近使用”标签，然后再次打开并尝试注销时，它不会返回我的 LoginSignUpVc >根视图控制器。 self.parent？.navigationController？.popToRootViewController（animated：true）肯定有问题

我们将不胜感激，谢谢。

Answer 1

再次打开应用程序时，您的根视图控制器是tabbBar。您正在使用登录视图更改root。对我来说，在根视图中更改根视图并弹出到新的根目录很奇怪。请制作一个新的故事板进行登录和注册。并删除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)
        }

您可以在appDelegate中检查userDefaults并在正确的故事板上享用午餐。

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情节提要ID

关闭应用程序，然后再次打开，然后PopToRootViewController无法在快速Firebase中工作

1 个答案: