Question

我正在尝试将用户保存到我的firebase数据库。我正在使用FBSDKLoginManager()创建帐户/登录。创建帐户后，我想将用户存储到我的firebase数据库中。我现在可以登录用户并且他们的电子邮件显示在firebase的Auth选项卡中（参见屏幕截图），但我的updateChildValues似乎没有任何影响（也见截图）。

我是否将updateChildValues放在正确的位置？它目前位于signInWithCredential内。我还必须执行FBSDKGraphRequest以获取我感兴趣的信息存储在我的firebase数据库中。

我的firebase的Auth选项卡显示身份验证正在运行：

但数据库未更新

    func showLoginView() {
    let loginManager = FBSDKLoginManager()
    loginManager.logInWithReadPermissions(fbPermissions, fromViewController: self, handler: { (result:FBSDKLoginManagerLoginResult!, error:NSError!) -> Void in

        if ((error) != nil) {
            print("Error loggin in is \(error)")
        } else if (result.isCancelled) {
            print("The user cancelled loggin in")
        } else {
            // No error, No cancelling:
            // using the FBAccessToken, we get a Firebase token
            let credential = FIRFacebookAuthProvider.credentialWithAccessToken(FBSDKAccessToken.currentAccessToken().tokenString)

            // using the credentials above, sign in to firebase to create a user session
            FIRAuth.auth()?.signInWithCredential(credential) { (user, error) in
                print("User logged in the firebase")

                // adding a reference to our firebase database
                let ref = FIRDatabase.database().referenceFromURL("https://project-12345.firebaseio.com/")

                // guard for user id
                guard let uid = user?.uid else {
                    return
                }

                // create a child reference - uid will let us wrap each users data in a unique user id for later reference
                let usersReference = ref.child("users").child(uid)

                // performing the Facebook graph request to get the user data that just logged in so we can assign this stuff to our Firebase database:
                let graphRequest : FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "id, name, email"])
                graphRequest.startWithCompletionHandler({ (connection, result, error) -> Void in

                    if ((error) != nil) {
                        // Process error
                        print("Error: \(error)")
                    } else {
                        print("fetched user: \(result)")

                        // Facebook users name:
                        let userName:NSString = result.valueForKey("name") as! NSString
                        self.usersName = userName
                        print("User Name is: \(userName)")
                        print("self.usersName is \(self.usersName)")

                        // Facebook users email:
                        let userEmail:NSString = result.valueForKey("email") as! NSString
                        self.usersEmail = userEmail
                        print("User Email is: \(userEmail)")
                        print("self.usersEmail is \(self.usersEmail)")

                        // Facebook users ID:
                        let userID:NSString = result.valueForKey("id") as! NSString
                        self.usersFacebookID = userID
                        print("Users Facebook ID is: \(userID)")
                        print("self.usersFacebookID is \(self.usersFacebookID)")
                    }
                })

                // set values for assignment in our Firebase database
                let values = ["name": self.usersName, "email": self.usersEmail, "facebookID": self.usersFacebookID]

                // update our databse by using the child database reference above called usersReference
                usersReference.updateChildValues(values, withCompletionBlock: { (err, ref) in
                    // if there's an error in saving to our firebase database
                    if err != nil {
                        print(err)
                        return
                    }
                    // no error, so it means we've saved the user into our firebase database successfully
                    print("Save the user successfully into Firebase database")
                })
            }
        }
    })
}

更新

显然在10分钟左右之后，数据库被更新了空的Facebook数据......不知道为什么这么长时间。这是一个截图：

Answer 1

Swift 3 :(最后只更改了它，节省了很多行）

 func showLoginView() {
        let loginManager = FBSDKLoginManager()
        loginManager.logInWithReadPermissions(fbPermissions, fromViewController: self, handler: { (result:FBSDKLoginManagerLoginResult!, error:NSError!) -> Void in

            if ((error) != nil) {
                print("Error loggin in is \(error)")
            } else if (result.isCancelled) {
                print("The user cancelled loggin in")
            } else {
                // No error, No cancelling:
                // using the FBAccessToken, we get a Firebase token
                let credential = FIRFacebookAuthProvider.credentialWithAccessToken(FBSDKAccessToken.currentAccessToken().tokenString)

                // using the credentials above, sign in to firebase to create a user session
                FIRAuth.auth()?.signInWithCredential(credential) { (user, error) in
                    print("User logged in the firebase")

                    // adding a reference to our firebase database
                    let ref = FIRDatabase.database().referenceFromURL("https://project-12345.firebaseio.com/")

                    // guard for user id
                    guard let uid = user?.uid else {
                        return
                    }

                    // create a child reference - uid will let us wrap each users data in a unique user id for later reference
                    let usersReference = ref.child("users").child(uid)

                    // performing the Facebook graph request to get the user data that just logged in so we can assign this stuff to our Firebase database:
                    let graphRequest : FBSDKGraphRequest(graphPath: "/me", parameters: ["fields": "id, email, name"]).start{
                        (connection, result, err) in

                        if ((error) != nil) {
                            // Process error
                            print("Error: \(error)")
                        } else {
                            print("fetched user: \(result)")

                            let values: [String:AnyObject] = result as! [String : AnyObject]

                            // update our databse by using the child database reference above called usersReference
                            usersReference.updateChildValues(values, withCompletionBlock: { (err, ref) in
                                // if there's an error in saving to our firebase database
                                if err != nil {
                                    print(err)
                                    return
                                }
                                // no error, so it means we've saved the user into our firebase database successfully
                                print("Save the user successfully into Firebase database")
                            })
                        }
                    })


                }
            }
        })
    }

Answer 2

您应该只在执行完成块ws.onmessage = (e) => { // a message was received let message = JSON.parse(e.data); if (message.type === 'pause') { currentSong.pause(); // HOW DO I ALSO CALL COMPONENT RENDER() FUNCTION? console.log('pausing: server websocket message'); } else if (message.type === 'play') { currentSong.setCurrentTime(message.currentTime); currentSong.play((success) => { if (success) { console.log('playing: server websocket message'); } else { console.log('playback failed due to audio decoding errors'); } }); } };时更新值，因为这样您将从Facebook获取数据！ export default function(state, action) { switch (action.type) { case CLICK_PLAY_PAUSE_BUTTON: let newState = cloneObject(state); newState.isPlaying = !state.isPlaying; if (newState.isPlaying) { currentSong.play(success => { // Can't figure out why this callback never calls! if (success) { console.log('successfully finished playing: button pressed'); } else { console.log('playback failed due to audio decoding errors'); } }); currentSong.getCurrentTime(seconds => { ws.send(JSON.stringify({ type: 'play', currentTime: seconds, name: userName })); }); } else { currentSong.pause(); currentSong.getCurrentTime(seconds => { ws.send(JSON.stringify({ type: 'pause', currentTime: seconds, name: userName })); }); } return newState; default: // if state is undefined return newState instead // of boolean return state || newState; } };需要位于完成区graphRequest.startWithCompletionHandler内。我在下面附上了它。试试!!

usersReference.updateChildValues

Swift / Firebase：如何在创建帐户时将Facebook用户正确存储到Firebase数据库中？

2 个答案: