ios - Swift - 在 VC 中登录，允许任何人输入而不验证用户名和密码匹配或保存

Question

同时使用 firebase。我的注册运作良好，它注册了用户。但是我的登录在开始时工作正常，但现在它允许任何人转到下一个 View (登录)。

这是我的代码:

登录VC..

import UIKit
import Firebase

class SignInVC: UIViewController {
    @IBOutlet weak var emailTF: UITextField!
    @IBOutlet weak var passwordTF: UITextField!

    @IBAction func onSignInTapped(_ sender: Any) {
        guard let email = emailTF.text,
        email != "",
        let password = passwordTF.text,
        password != ""
            else {
               AlertController.showAlert(self, title: "Missing Information", message: "Please fill in username and password")
                return
        }

        Auth.auth().signIn(withEmail: email, password: password) { (user, error) in
            guard error == nil
                else {
                    AlertController.showAlert(self, title: "Oops!", message: error!.localizedDescription)
                    return
            }
            guard let user = user else {return}
            print(user.email ?? "Missing email address")
            print(user.displayName ?? "Missing name")
            print(user.uid)

            self.performSegue(withIdentifier: "signInSegue", sender: nil)
        }
    }

    //remove keyboard
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        self.view.endEditing(true)
    }    
}

AlerControllerVC

import UIKit
import Firebase

class AlertController {
    static func showAlert(_ inViewController: UIViewController, title: String, message: String) {
        let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
        let action = UIAlertAction(title: "OK", style: .default, handler: nil)
        alert.addAction(action)
        inViewController.present(alert, animated: true, completion: nil)
    }
}

我试了很多次，然后又重写了一遍，但还是不能正常工作，执行时它说:

".SignInVC: 0x7fd99c208280> whose view is not in the window hierarchy!"

Answer 1

请检查您的转场是从按钮到 ViewController 还是从 ViewController 到 ViewController。如果它是从按钮到 VC 那么它不依赖于你写的代码