无法通过 Unity 将数据写入 Firebase 数据库

Posted 2023-04-12

【中文标题】无法通过 Unity 将数据写入 Firebase 数据库

【英文标题】：Unable To Write Data to Firebase Database via Unity

【发布时间】：2019-03-04 17:10:03

【问题描述】：

所以最近我在尝试通过 Unity 在 Firebase 上写入/读取数据时遇到了麻烦。我曾在 Java 上使用 Firebase（在 android Studio 中），目前我正在了解如何在 C# 中的 Unity 上使用它。

在我无法与 firebase 数据库握手之前，我确实遇到了一个错误，this 解决了我的问题，这导致我遇到了这个错误。 所以目前我正在使用 Unity 2018.2.10f1 以及来自 Github 的 Firebase SDK 5.3.0 和 quick-start。 我得到的错误是

EntryPointNotFoundException: SWIGRegisterExceptionCallbacks_DatabaseInternal

Firebase.Database.Internal.DatabaseInternalPINVOKE+SWIGExceptionHelper..cctor ()
Rethrow as TypeInitializationException: An exception was thrown by the type initializer for SWIGExceptionHelper
Firebase.Database.Internal.DatabaseInternalPINVOKE..cctor ()
Rethrow as TypeInitializationException: An exception was thrown by the type initializer for Firebase.Database.Internal.DatabaseInternalPINVOKE
Firebase.Database.Internal.InternalFirebaseDatabase.GetInstance (Firebase.FirebaseApp app, System.String url)
Firebase.Database.FirebaseDatabase.GetInstance (Firebase.FirebaseApp app, System.String url)
Firebase.Database.FirebaseDatabase.GetInstance (Firebase.FirebaseApp app)
Firebase.Database.FirebaseDatabase.get_DefaultInstance ()
Firebase.Sample.Database.UIHandler.StartListener () (at Assets/Firebase/Sample/Database/UIHandler.cs:75)
Firebase.Sample.Database.UIHandler.InitializeFirebase () (at Assets/Firebase/Sample/Database/UIHandler.cs:71)
Firebase.Sample.Database.UIHandler.<Start>m__0 (System.Threading.Tasks.Task`1 task) (at Assets/Firebase/Sample/Database/UIHandler.cs:55)
System.Threading.Tasks.Task`1+<ContinueWith>c__AnonStorey0[Firebase.DependencyStatus].<>m__0 (System.Threading.Tasks.Task t)
System.Threading.Tasks.Task+<ContinueWith>c__AnonStorey2.<>m__0 (System.Threading.Tasks.Task t)
System.Threading.Tasks.Task+<ContinueWith>c__AnonStorey0`1+<ContinueWith>c__AnonStorey1[System.Int32].<>m__0 ()

尝试在 firebase 数据库中写入数据时会发生这种情况。 这是我在数据库中的规则设置：

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

脚本：

// Copyright 2016 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

namespace Firebase.Sample.Database 
  using Firebase;
  using Firebase.Database;
  using Firebase.Unity.Editor;
  using System;
  using System.Collections;
  using System.Collections.Generic;
  using UnityEngine;

  // Handler for UI buttons on the scene.  Also performs some
  // necessary setup (initializing the firebase app, etc) on
  // startup.
  public class UIHandler : MonoBehaviour 

    ArrayList leaderBoard = new ArrayList();
    Vector2 scrollPosition = Vector2.zero;
    private Vector2 controlsScrollViewVector = Vector2.zero;

    public GUISkin fb_GUISkin;

    private const int MaxScores = 5;
    private string logText = "";
    private string email = "";
    private int score = 100;
    private Vector2 scrollViewVector = Vector2.zero;
    protected bool UIEnabled = true;

    const int kMaxLogSize = 16382;
    DependencyStatus dependencyStatus = DependencyStatus.UnavailableOther;

    // When the app starts, check to make sure that we have
    // the required dependencies to use Firebase, and if not,
    // add them if possible.
    protected virtual void Start() 
      leaderBoard.Clear();
      leaderBoard.Add("Firebase Top " + MaxScores.ToString() + " Scores");

      FirebaseApp.CheckAndFixDependenciesAsync().ContinueWith(task => 
        dependencyStatus = task.Result;
        if (dependencyStatus == DependencyStatus.Available) 
          InitializeFirebase();
         else 
          Debug.LogError(
            "Could not resolve all Firebase dependencies: " + dependencyStatus);
        
      );
    

    // Initialize the Firebase database:
    protected virtual void InitializeFirebase() 
      FirebaseApp app = FirebaseApp.DefaultInstance;
      // NOTE: You'll need to replace this url with your Firebase App's database
      // path in order for the database connection to work correctly in editor.
      app.SetEditorDatabaseUrl("https://unity-master-server-test.firebaseio.com/");
      if (app.Options.DatabaseUrl != null)
        app.SetEditorDatabaseUrl(app.Options.DatabaseUrl);
      StartListener();
    

    protected void StartListener() 
      FirebaseDatabase.DefaultInstance
        .GetReference("Leaders").OrderByChild("score")
        .ValueChanged += (object sender2, ValueChangedEventArgs e2) => 
          if (e2.DatabaseError != null) 
            Debug.LogError(e2.DatabaseError.Message);
            return;
          
          Debug.Log("Received values for Leaders.");
          string title = leaderBoard[0].ToString();
          leaderBoard.Clear();
          leaderBoard.Add(title);
          if (e2.Snapshot != null && e2.Snapshot.ChildrenCount > 0) 
            foreach (var childSnapshot in e2.Snapshot.Children) 
              if (childSnapshot.Child("score") == null
              || childSnapshot.Child("score").Value == null) 
                Debug.LogError("Bad data in sample.  Did you forget to call SetEditorDatabaseUrl with your project id?");
                break;
               else 
                Debug.Log("Leaders entry : " +
                childSnapshot.Child("email").Value.ToString() + " - " +
                childSnapshot.Child("score").Value.ToString());
                leaderBoard.Insert(1, childSnapshot.Child("score").Value.ToString()
                + "  " + childSnapshot.Child("email").Value.ToString());
              
            
          
        ;
    

    // Exit if escape (or back, on mobile) is pressed.
    protected virtual void Update() 
      if (Input.GetKeyDown(KeyCode.Escape)) 
        Application.Quit();
      
    

    // Output text to the debug log text field, as well as the console.
    public void DebugLog(string s) 
      Debug.Log(s);
      logText += s + "\n";

      while (logText.Length > kMaxLogSize) 
        int index = logText.IndexOf("\n");
        logText = logText.Substring(index + 1);
      

      scrollViewVector.y = int.MaxValue;
    

    // A realtime database transaction receives MutableData which can be modified
    // and returns a TransactionResult which is either TransactionResult.Success(data) with
    // modified data or TransactionResult.Abort() which stops the transaction with no changes.
    TransactionResult AddScoreTransaction(MutableData mutableData) 
      List<object> leaders = mutableData.Value as List<object>;

      if (leaders == null) 
        leaders = new List<object>();
       else if (mutableData.ChildrenCount >= MaxScores) 
        // If the current list of scores is greater or equal to our maximum allowed number,
        // we see if the new score should be added and remove the lowest existing score.
        long minScore = long.MaxValue;
        object minVal = null;
        foreach (var child in leaders) 
          if (!(child is Dictionary<string, object>))
            continue;
          long childScore = (long)((Dictionary<string, object>)child)["score"];
          if (childScore < minScore) 
            minScore = childScore;
            minVal = child;
          
        
        // If the new score is lower than the current minimum, we abort.
        if (minScore > score) 
          return TransactionResult.Abort();
        
        // Otherwise, we remove the current lowest to be replaced with the new score.
        leaders.Remove(minVal);
      

      // Now we add the new score as a new entry that contains the email address and score.
      Dictionary<string, object> newScoreMap = new Dictionary<string, object>();
      newScoreMap["score"] = score;
      newScoreMap["email"] = email;
      leaders.Add(newScoreMap);

      // You must set the Value to indicate data at that location has changed.
      mutableData.Value = leaders;
      return TransactionResult.Success(mutableData);
    

    public void AddScore() 
      if (score == 0 || string.IsNullOrEmpty(email)) 
        DebugLog("invalid score or email.");
        return;
      
      DebugLog(String.Format("Attempting to add score 0 1",
        email, score.ToString()));

      DatabaseReference reference = FirebaseDatabase.DefaultInstance.GetReference("Leaders");

      DebugLog("Running Transaction...");
      // Use a transaction to ensure that we do not encounter issues with
      // simultaneous updates that otherwise might create more than MaxScores top scores.
      reference.RunTransaction(AddScoreTransaction)
        .ContinueWith(task => 
          if (task.Exception != null) 
            DebugLog(task.Exception.ToString());
           else if (task.IsCompleted) 
            DebugLog("Transaction complete.");
          
        );
    

    // Render the log output in a scroll view.
    void GUIDisplayLog() 
      scrollViewVector = GUILayout.BeginScrollView(scrollViewVector);
      GUILayout.Label(logText);
      GUILayout.EndScrollView();
    

    // Render the buttons and other controls.
    void GUIDisplayControls() 
      if (UIEnabled) 
        controlsScrollViewVector =
            GUILayout.BeginScrollView(controlsScrollViewVector);
        GUILayout.BeginVertical();
        GUILayout.BeginHorizontal();
        GUILayout.Label("Email:", GUILayout.Width(Screen.width * 0.20f));
        email = GUILayout.TextField(email);
        GUILayout.EndHorizontal();

        GUILayout.Space(20);

        GUILayout.BeginHorizontal();
        GUILayout.Label("Score:", GUILayout.Width(Screen.width * 0.20f));
        int.TryParse(GUILayout.TextField(score.ToString()), out score);
        GUILayout.EndHorizontal();

        GUILayout.Space(20);

        if (!String.IsNullOrEmpty(email) && GUILayout.Button("Enter Score")) 
          AddScore();
        

        GUILayout.Space(20);

        if (GUILayout.Button("Go Offline")) 
          FirebaseDatabase.DefaultInstance.GoOffline();
        

        GUILayout.Space(20);

        if (GUILayout.Button("Go Online")) 
          FirebaseDatabase.DefaultInstance.GoOnline();
        

        GUILayout.EndVertical();
        GUILayout.EndScrollView();
      
    

    void GUIDisplayLeaders() 
      GUI.skin.box.fontSize = 36;
      scrollPosition = GUILayout.BeginScrollView(scrollPosition, false, true);
      GUILayout.BeginVertical(GUI.skin.box);

      foreach (string item in leaderBoard) 
        GUILayout.Label(item, GUI.skin.box, GUILayout.ExpandWidth(true));
      

      GUILayout.EndVertical();
      GUILayout.EndScrollView();
    

    // Render the GUI:
    void OnGUI() 
      GUI.skin = fb_GUISkin;
      if (dependencyStatus != DependencyStatus.Available) 
        GUILayout.Label("One or more Firebase dependencies are not present.");
        GUILayout.Label("Current dependency status: " + dependencyStatus.ToString());
        return;
      
      Rect logArea, controlArea, leaderBoardArea;

      if (Screen.width < Screen.height) 
        // Portrait mode
        controlArea = new Rect(0.0f, 0.0f, Screen.width, Screen.height * 0.5f);
        leaderBoardArea = new Rect(0, Screen.height * 0.5f, Screen.width * 0.5f, Screen.height * 0.5f);
        logArea = new Rect(Screen.width * 0.5f, Screen.height * 0.5f, Screen.width * 0.5f, Screen.height * 0.5f);
       else 
        // Landscape mode
        controlArea = new Rect(0.0f, 0.0f, Screen.width * 0.5f, Screen.height);
        leaderBoardArea = new Rect(Screen.width * 0.5f, 0, Screen.width * 0.5f, Screen.height * 0.5f);
        logArea = new Rect(Screen.width * 0.5f, Screen.height * 0.5f, Screen.width * 0.5f, Screen.height * 0.5f);
      

      GUILayout.BeginArea(leaderBoardArea);
      GUIDisplayLeaders();
      GUILayout.EndArea();

      GUILayout.BeginArea(logArea);
      GUIDisplayLog();
      GUILayout.EndArea();

      GUILayout.BeginArea(controlArea);
      GUIDisplayControls();
      GUILayout.EndArea();
    
  

【问题讨论】：

请贴出导致问题的实际代码。

脚本已添加到帖子中。它来自 Firebase 的快速入门（统一）。脚本未修改。

SetEditorDatabaseUrl("replace-with-your-project.firebaseio.com/"); 是否设置为您的项目 ID？

我已经这样做了。

奇怪的是，Firebase 的其他功能可以正常工作，例如身份验证、存储、分析。但不是数据库。

【参考方案1】：

我在使用 Firebase.database 时收到了同样的错误。去找你的督察 搜索

Firebase.Database 。您可以在 unity Inspector 中找到 3 Firebase.Database。

在 plugins/ios 中找到 Firebase.database。

启用编辑器支持和 ios

并保存。并在另外 2 个 firebase.database 中取消选择编辑器支持和 ios。

并保存。

您的错误将得到解决。