ios - CreateNewUser() firebase 方法在用户 uid 的闭包中返回 nil

Question

我正在尝试对用户进行身份验证。但是 createNewUser() firebase 方法在 user?.user.uid 的闭包中返回 nil，因此我无法在正确的节点下添加数据。

下面是我的用户创建方法:

 func createNewUser(email: String, password: String) {
    Auth.auth().createUser(withEmail: email, password: password) { user, error in
        if error == nil && user != nil { //user create works
            print(user, "<-- User Created (user)")
        } else { //user not create
            print("Error creating user: \(error!.localizedDescription)")
        }

        //database integration
        let ref = Database.database().reference()
        let usersRef = ref.child("users2")

        let uid = user?.user.uid
        print(email, "<-- email")

        print(uid, "<-- this is uid")
        let newUserRef = usersRef.child(uid!)//This fails because UID is nil
        newUserRef.setValue(["email": self.emailTextField.text!, "password": self.passwordTextField.text!, "fullName": self.fullNameTextField.text!, "username": self.usernameTextField.text!])

        print(email, "<--- this is emaiL??")

    } //end of create user

}

我该如何解决这个问题？

Answer 1

When I look at the docs for Firebase's "createUserWithEmail:password:completion:" method ，看起来您从 Auth.auth().createUser(withEmail:....

返回了一个 authResult, error

由此，要获得用户，您需要:

func createNewUser(email: String, password: String) {
      Auth.auth().createUser(withEmail: email, password: password) { authResult, error in

      guard let authResult = authResult, error == nil else {
         print("Error creating user: \(error!.localizedDescription)")
         return // an error!
      }

      if let user = authResult.user {
         if let uid = user.uid {
            print("uid is \(uid)")
         }
         if let email = user.email {
            print("email is \(email)")
         }
      }
      ...
      ...
      ...