所以最近我一直在努力通过Unity在Firebase上编写/读取数据 . 我有使用Firebase on Java（在Android Studio中）的经验，我目前正在了解如何在C＃中使用Unity .
我确实有一个错误之前我无法获得与firebase数据库的握手和this解决了一些解决了我的问题，这导致我得到这个错误 . 所以目前我正在使用 Unity 2018.2.10f1 和Firebase SDK 5.3.0以及来自Github的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 . 这是我在数据库中设置的规则：
{
"rules": {
".read": true,
".write": true
}
}
剧本 ：
// 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();
}
}
}