swift - 当前用户 UID 与身份验证 UID 不同吗？

Question

警告:我对一般编码和 xcode 非常陌生

运行 Xcode 8.2

无论如何，我已经保存了我的用户身份验证详细信息、电子邮件密码。我将它们保存在 user/currentUser.UID 下，它提供了用户名和电子邮件。我想检索用户名并将其作为标签文本，但 UID 不同？!

通过数据库抓取用户名，并为用户名设置标签

@IBOutlet weak var welcomeHomeUsername: UILabel!

func welcomeHomeAddUsername() {


    guard let uid12 = Auth.auth().currentUser?.uid else {
        return
    }

    print("User ID post guard: \(uid12)")

    ref.child("users").child(uid12).child("username").observeSingleEvent(of: .value, with: { snapshotWelcome in

        print(snapshotWelcome)
        let welcomeHomeUser = snapshotWelcome.value as? String
        self.welcomeHomeUsername.text = welcomeHomeUser

    })

}

然后这是允许用户使用 firebase auth 进行注册的代码，然后将用户名和电子邮件值保存在/users/(uid)/

@IBAction func signUpButton(_ sender: Any)
{


    //Authenticate User//
    Auth.auth().createUser(withEmail: emailTextField.text!, password: passwordTextField.text!) { (user, error) in

        if user != nil {
            print("User Created")
                self.performSegue(withIdentifier: "backLogin", sender: self)
        }
        else {
            print("error no seg")
        }
    }
    //Successfully Authenticated User//




    guard let uid = Auth.auth().currentUser?.uid else {
        return
    }



    //Add User to Database//
    let ref = Database.database().reference(fromURL: "~~~My Database URL~~~")
    let usersReference = ref.child("users").child(uid)
    let values = ["username": usernameTextField.text, "email": emailTextField.text]
    usersReference.updateChildValues(values) { (err, ref) in

        if err != nil {
            print("error no user created")
        }

        if (Auth.auth().currentUser != nil){
            print("user id: " + (Auth.auth().currentUser?.uid)!);
            return
        }
        print("Saved user succesfully into Firebase DB")


    }


}

然后在我的控制台输出中

    user id: mrsIBAAl2LVb7FetVxnMwBtMJ562

    User ID post guard: 0QkYbdPdH7QdZsdRjck53l4Ekrk2
    Snap (message1) Welcome to the Beta!
    Snap (username) <null>

我还有一个获取 MOTD 的函数，现在是“欢迎参加测试!”这是我数据库中的一个分支，我在不同的函数中引用它，但我认为这不会产生影响。

Answer 1

Eureka !我发现问题了!

我查看了我的注册流程并测试了它的不同部分，这时我注意到数据库中的 UID 是过去的 UID，即身份验证，因此当创建新的身份验证 UID 时，旧的 UID 就会出现在数据库中。我使用控制台打印查看了流程，发现用户的身份验证和创建是在数据库记录用户之后发生的!因此，为了解决这个问题，我将身份验证放入其自己的函数中，然后在用户通过身份验证后，我调用将用户添加到数据库的函数，这样就可以了!

@IBAction func signUpButton(_ sender: Any)
{

    signupTrue = 0
    print(signupTrue)

    let ref3 = Database.database().reference()

    ref3.child("schools").observeSingleEvent(of: .value, with: { (snapshot) in

        if snapshot.hasChild(self.schoolNameTextfield.text!){
            print("true school exist")
            signupTrue = 1
            print(signupTrue)

            self.authUserFunc()

        }
        else {
            print("false school doesn't exist")
            signupTrue = 2
            print(signupTrue)
        }
    })
    print("Test ending ref3")
}



func authUserFunc() {

    //Authenticate User//
    Auth.auth().createUser(withEmail: emailTextField.text!, password: passwordTextField.text!) { (user, error) in

        if user != nil {
            print("User Created")
            self.performSegue(withIdentifier: "backLogin", sender: self)
            self.addToDatabase()
        }
        else {
            print("error no seg")
        }
    }
    //Successfully Authenticated User//

}




func addToDatabase() {
    print("Starting add to database")
        print("starting signup")


        //Add User to School Database//
        let ref = Database.database().reference(fromURL: "~~~My Database URL~~~")
        let userSchoolReference = ref.child("schools").child(schoolNameTextfield.text!).child("users").child("\(Auth.auth().currentUser!.uid)")
        let values = ["username": usernameTextField.text!, "email": emailTextField.text!]
        userSchoolReference.updateChildValues(values) { (err, ref) in


            if err != nil {
                print("error no school user created")
            }

            if (Auth.auth().currentUser != nil){
                print("Saved user succesfully into School Firebase DB")
                //print("user id: " + (Auth.auth().currentUser?.uid)!);
                return
            }
        }



        //add user to users file//
        //let userReference = ref.child("users").child("\(Auth.auth().currentUser!.uid)")
        let values2 = ["username": usernameTextField.text!, "email": emailTextField.text!, "password": passwordTextField.text!]


    Database.database().reference().child("users").child("\(Auth.auth().currentUser!.uid)").updateChildValues(values2) { (err, ref) in
        if err != nil{
            print("Error no user created")
            return
        }
    }

    print("\(Auth.auth().currentUser?.uid)")

//end func addToDatabase
}

感谢您的所有帮助!我想现在我已经度过了这个坎坷，我将能够以更多的知识继续我的编码!