如何在不询问iOS Swift登录的情况下自动登录？

概述我有不同的故事板叫做Main,tabBar,home,map等.在tabBar的故事栏中,我使用了SWRevealViewController视图并作为初始视图启动. 在主要的Storyboard中,只有两个用于登录和注册控制器. 这是tabBar storyBoard 的截图 我的问题是当用户注销并返回时它自动进入主屏幕而不是登录屏幕[此问题是由于SWRevealViewController是初 我有不同的故事板叫做Main,tabbar,home,map等.在tabbar的故事栏中,我使用了SWRevealVIEwController视图并作为初始视图启动.
在主要的Storyboard中,只有两个用于登录和注册控制器.

这是tabbar storyBoard

的截图

我的问题是当用户注销并返回时它自动进入主屏幕而不是登录屏幕[此问题是由于SWRevealVIEwController是初始视图控制器].

我试过这里的代码：在符号视图控制器中

在vIEwDIDAppear中检查firebase中是否有可用的用户

overrIDe func vIEwDIDAppear(_ animated: Bool) {    super.vIEwDIDAppear(animated)    if API.User.CURRENT_USER != nil {        // segue to the Tab bar Controller        self.performSegue(withIDentifIEr: "signInToTabbar",sender: nil)    }}

登录动作：

@IBAction func SignInbutton(_ sender: Any) {    vIEw.endEditing(true)    guard        let email = emailTextFIEld.text,!email.isEmpty,let password = passwordTextFIEld.text,!password.isEmpty        else {            self.showErrorAlert(message: "Username or email or passowrd should not be empty")            return    }    // show the progress to the user    ProgressHUD.show("Starting sign-in...",interaction: false)    // use the signIn class method of the AuthService class    AuthService.signIn(email: emailTextFIEld.text!,password: passwordTextFIEld.text!,onSuccess: {        // on success segue to the Tab bar Controller        API.User.observeCurrentUser { user in            guard let currentUser = Auth.auth().currentUser else {                return            }            PrefsManager.sharedinstance.UIDfirebase = currentUser.uID            PrefsManager.sharedinstance.username  = user.username!            PrefsManager.sharedinstance.userEmail = user.email!            PrefsManager.sharedinstance.imageURL  = user.profileImageURL!            ProgressHUD.showSuccess("Sucessfully signed in.")            self.performSegue(withIDentifIEr: "signInToTabbar",sender: nil)        }    },onError: { errorString in        ProgressHUD.dismiss()        self.showErrorAlert(message: errorString ?? "Server error")    })}

}

SWRevealVIEwController菜单表我列出了菜单,如家,预订,个人资料,注销：

func tableVIEw(_ tableVIEw: UItableVIEw,cellForRowAt indexPath: IndexPath) -> UItableVIEwCell{    let cell = tableVIEw.dequeueReusableCell(withIDentifIEr: "Cell") as! MenutableVIEwCell    cell.menuname.text = menuname[indexPath.row]    cell.menuIcon.image = UIImage(named: menuImage[indexPath.row])    return cell}func tableVIEw(_ tableVIEw: UItableVIEw,dIDSelectRowAt indexPath: IndexPath) {  //        tableVIEw.deselectRow(at: indexPath,animated: true)    let row = indexPath.row    if row == 0{        let storyboard = UIStoryboard(name: "Home",bundle: nil)        let obj = storyboard.instantiateVIEwController(withIDentifIEr: "HomeVIEwController") as! HomeVIEwController        let navController = UINavigationController(rootVIEwController: obj)        navController.setVIEwControllers([obj],animated:true)        navController.tabbarController?.tabbar.isHIDden = false        self.revealVIEwController().setFront(navController,animated: true)        self.revealVIEwController().setFrontVIEwposition(FrontVIEwposition.left,animated: true)    } else if row == 1{        let storyboard = UIStoryboard(name: "Bookings",bundle: nil)        let obj = storyboard.instantiateVIEwController(withIDentifIEr: "BookingsVIEwController") as! BookingsVIEwController        let navController = UINavigationController(rootVIEwController: obj)        navController.setVIEwControllers([obj],animated:true)        self.revealVIEwController().setFront(navController,animated: true)    } else if row == 2 {        let storyboard = UIStoryboard(name: "Profile",bundle: nil)        let obj = storyboard.instantiateVIEwController(withIDentifIEr: "profileVIEwController") as! profileVIEwController        let navController = UINavigationController(rootVIEwController: obj)        navController.setVIEwControllers([obj],animated: true)    } else if row == 3 {        print(indexPath)        // Log out user from Firebase        AuthService.signOut(onSuccess: {            // Present the Sign In VC    //                PrefsManager.sharedinstance.logoutprefences()            let storyboard = UIStoryboard(name: "Main",bundle: nil)            let signInVC = storyboard.instantiateVIEwController(withIDentifIEr: "signInVIEwController")                        self.present(signInVC,animated: true)  //                self.navigationController?.pushVIEwController(signInVC,animated: true)        }) { (errorMessage) in            ProgressHUD.showError(errorMessage)        }    }}

在家庭视图控制器中,检查用户是否可用：

overrIDe func vIEwDIDAppear(_ animated: Bool) {    if API.User.CURRENT_USER != nil {        // segue to the Tab bar Controller        self.performSegue(withIDentifIEr: "signInToTabbar",sender: nil)    }    super.vIEwDIDAppear(true)    self.tabbarController?.tabbar.isHIDden = false}

解决方法 当您从应用程序注销时,您必须将signIn视图控制器设置为这样的根视图控制器.

AuthService.signOut(onSuccess: {       // Present the Sign In VC       let storyboard = UIStoryboard(name: "Main",bundle: nil)       let signInVC = storyboard.instantiateVIEwController(withIDentifIEr: "signInVIEwController") as! signInVIEwController       let nav = UINavigationController(rootVIEwController:signInVC)       let application = UIApplication.shared.delegate as! AppDelegate       application.window!.rootVIEwController = nav}) { (errorMessage) in        ProgressHUD.showError(errorMessage) }

现在在AppDelegate.swift文件中,在application(_：dIDFinishLaunchingWithOptions :)方法中,你必须检查用户是否为nil.

if API.User.CURRENT_USER != nil {       let mainNav = self.window?.rootVIEwController as! UINavigationController       let storyBoard = UIStoryboard(name: "tabbar",bundle:nil)       let sWRevealVIEwController = storyBoard.instantiateVIEwController(withIDentifIEr: "SWRevealVIEwController") as! SWRevealVIEwController       mainNav.pushVIEwController(sWRevealVIEwController,animated: false) }

注意：请在标识符名称和视图控制器名称中添加故事板ID和视图控制器名称.

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