Login Button is not working in swift 3

Question

I am working on my app and I am using UserDefaults to store value of token

   @IBAction func loginButtonTapped(_ sender: Any) {
            Alamofire.request(Constants.API.url("driver/login"), method: .post, parameters: parameter, encoding: URLEncoding.default, headers: header).responseJSON { (response:DataResponse<Any>) in

        switch(response.result) {
        case .success(_):
            guard let json = response.result.value as! [String:Any]? else{ return}
            guard let userData = json["data"] as! [String: AnyObject]? else{ return}
            guard let token = userData["token"] as! String? else { return}
            print("The value of token is \(token)")
            let user = UserModel(with: userData)
            print("The value of \(user)")
            UserDefaults.standard.setAccessToken(token)
            let userArchiveData = NSKeyedArchiver.archivedData(withRootObject:user )
            UserDefaults.standard.setUserData(userArchiveData as AnyObject)
            let nav = UIStoryboard.main.instantiate(.mainNavigation) as! UINavigationController
            let vc = self.storyboard?.instantiate(.homeVC) as! HomeViewController
             nav.pushViewController(vc, animated: true)
            break

        case .failure(_):
            print(response.result.error as Any)
            showNormalAlertWithTitle("Invalid Email", message: "Please Provide correct email and password")
            break

        }
    }
    }

Here I am storing the token value when login button is clicked. When I click the logout option it opens the login view controller, this is the code I wrote in logout function

 func logOut() {
    UserDefaults.standard.setUserData(nil)
    UserDefaults.standard.setAccessToken(nil)
    let vc = storyboard?.instantiateViewController(withIdentifier: "mainNavigation")
    UIApplication.shared.keyWindow?.rootViewController = vc
}

Now the problem is, after logout when I am going to click login button again, the login button is not working, It is not pushing to the HomeViewController

The code I wrote in AppDelegate class:

 func goToRootViewController() {
    storyBoard = UIStoryboard(name: "Main", bundle: nil)
     let nav = UIStoryboard.main.instantiate(.mainNavigation) as! UINavigationController
    if UserDefaults.standard.getAccessToken().isEmpty {
        gotoLogin()
        return
    } else {
        let homeVc = UIStoryboard.main.instantiate(.homeVC) as! HomeViewController
        nav.pushViewController(homeVc, animated: false)
    }
    let leftMenuVC = storyBoard?.instantiateViewController(withIdentifier: "menuVC") as! MenuViewController
    container = MFSideMenuContainerViewController.container(withCenter: nav, leftMenuViewController: leftMenuVC, rightMenuViewController: nil)
    container?.panMode = MFSideMenuPanModeNone
    window?.rootViewController = container
    window?.makeKeyAndVisible()
}

Any Help?

Answer 1

The issue is that you are setting the rooViewController in logout. So when you push homecontroller again, it is actually pushing the controller but the navigation controller is not the rootViewController now. So you will have to do this in success part:

let nav = UIStoryboard.main.instantiate(.mainNavigation) as! UINavigationController
let vc = self.storyboard?.instantiate(.homeVC) as! HomeViewController
nav.pushViewController(vc, animated: true)
UIApplication.shared.keyWindow?.rootViewController = vc