ios - Firebase:虽然我正在设置数据，但值并未在 Firebase 的实时数据库中实时反射(reflect)

Question

应用程序配置已完成。

数据库规则设置为

{
  "rules": {
    ".read": true,
    ".write": true
  }
}


//declaration
var userDB: FIRDatabaseReference!

在viewDidLoad()中

userDB = FIRDatabase.database().reference()
//for reference database

操作方法如下

@IBAction func next(_ sender: Any) {
        guard fullname.text != "",email.text != "",password.text != "" ,confirmPassword.text != "" else {
            return
        }
        if(password.text == confirmPassword.text)
        {
            FIRAuth.auth()?.createUser(withEmail: email.text!, password: password.text!, completion: { (user, error) in
                if let error = error {
                    print(error.localizedDescription )
                }
                if let error = error {
                    print(error.localizedDescription)
                }

                if let user = user {
                    print(user.uid)
                    let changeRequest = FIRAuth.auth()!.currentUser!.profileChangeRequest()
                    changeRequest.displayName = self.fullname.text!
                    changeRequest.commitChanges(completion: nil)

                    let imageRef = self.userStorage.child("\(user.uid).jpg")

                    let data = UIImageJPEGRepresentation(self.uploadPictureImageview.image!, 0.5)

                    let uploadTask = imageRef.put(data!, metadata: nil, completion: { (metadata, err) in
                        if err != nil {
                            print(err!.localizedDescription)
                        }

                        imageRef.downloadURL(completion: { (url, er) in
                            if er != nil {
                                print(er!.localizedDescription)
                            }

                            print(url)
                            if let url = url {
                                print(url)
                                let userInfo: [String : String] = ["uid" : user.uid,
                                                                "full name" : self.fullname.text!,
                                                                "urlToImage" : url.absoluteString]

                                self.userDB.child("users").child(user.uid).setValue(userInfo)


                                let vc = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(withIdentifier: "usersVC")

                                self.present(vc, animated: true, completion: nil)

                            }

                        })

                    })

                    uploadTask.resume()

                }

            })
        }
        else{
            print("Password didnot match")
        }
    }

字典类型已从 [String: Any] 更改为 [String : String]

数据未保存在 Firebase 的实时数据库中。我是不是忘记了什么？

Answer 1

打开与 Firebase 引用的连接的正确方法如下...

 //declare the reference as an implicitly unwrapped optional
 var userDB: FIRDatabaseReference!

 //set the value of the reference in viewDidLoad
 override func viewDidLoad(){
     userDB = FIRDatabase().database().reference()
 }

如果您在执行上面所示的操作后仍然遇到相同的问题，那么您可能忘记从 Firebase 项目下载 GoogleService-info.plist 文件并将其添加到您的 Xcode 项目

还要确保 self.fullname.text! 有一个值，否则它将无法工作，因为 Firebase 不会采用 nil 值

编辑

还在您的 AppDelegate.swift 文件中进行检查以确保调用 FIRApp.configure() 。我相信你可以称之为 didFinishLaunchingWithOptions 或者你可以做..

override init(){
   FIRApp.configure()
}