self.gameObject无法访问

[jaegerwang]

unity version

Unity版本：2021.3.33f1c1

出现的问题

问题代码

使用Example2中的LuaBehaviour.cs：

/*
 * Tencent is pleased to support the open source community by making xLua available.
 * Copyright (C) 2016 THL A29 Limited, a Tencent company. All rights reserved.
 * Licensed under the MIT License (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
 * http://opensource.org/licenses/MIT
 * 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.
*/

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using XLua;
using System;

[System.Serializable]
public class Injection
{
    public string name;
    public GameObject value;
}

[LuaCallCSharp]
public class LuaBehaviour : MonoBehaviour
{
    public TextAsset luaScript;
    public Injection[] injections;

    internal static LuaEnv luaEnv = new LuaEnv(); //all lua behaviour shared one luaenv only!
    internal static float lastGCTime = 0;
    internal const float GCInterval = 1;//1 second 

    private Action luaStart;
    private Action luaUpdate;
    private Action luaOnDestroy;

    private LuaTable scriptEnv;

    void Awake()
    {
        scriptEnv = luaEnv.NewTable();

        // 为每个脚本设置一个独立的环境，可一定程度上防止脚本间全局变量、函数冲突
        LuaTable meta = luaEnv.NewTable();
        meta.Set("__index", luaEnv.Global);
        scriptEnv.SetMetaTable(meta);
        meta.Dispose();

        scriptEnv.Set("self", this);
        foreach (var injection in injections)
        {
            scriptEnv.Set(injection.name, injection.value);
        }

        luaEnv.DoString(luaScript.text, "LuaTestScript", scriptEnv);

        Action luaAwake = scriptEnv.Get<Action>("awake");
        scriptEnv.Get("start", out luaStart);
        scriptEnv.Get("update", out luaUpdate);
        scriptEnv.Get("ondestroy", out luaOnDestroy);

        if (luaAwake != null)
        {
            luaAwake();
        }
    }

    // Use this for initialization
    void Start()
    {
        if (luaStart != null)
        {
            luaStart();
        }
    }

    // Update is called once per frame
    void Update()
    {
        if (luaUpdate != null)
        {
            luaUpdate();
        }
        if (Time.time - LuaBehaviour.lastGCTime > GCInterval)
        {
            luaEnv.Tick();
            LuaBehaviour.lastGCTime = Time.time;
        }
    }

    void OnDestroy()
    {
        if (luaOnDestroy != null)
        {
            luaOnDestroy();
        }
        luaOnDestroy = null;
        luaUpdate = null;
        luaStart = null;
        scriptEnv.Dispose();
        injections = null;
    }
}

加载了

function awake()
	print("lua start...")
end

function start()
	print("lua start...")
end

function update()
    print("lua: current object is ", self.gameObject.name)
end

function ondestroy()
    print("lua destroy")
end

编译为webgl，在浏览器中运行：

LuaException: [string "LuaTestScript"]:10: attempt to index a nil value (field 'gameObject')

手动添加c#代码后，才能正常？

但是如果修改c#中的update方法，添加一行日志：

  void Update()
  {
      Debug.Log($"this gameObject name: {this.gameObject.name}");
      if (luaUpdate != null)
      {
          luaUpdate();
      }
      if (Time.time - LuaBehaviour.lastGCTime > GCInterval)
      {
          luaEnv.Tick();
          LuaBehaviour.lastGCTime = Time.time;
      }
  }

就可以正常在浏览器中看到输出：

直接在 editor 中运行也是正常的？

问题

想问一下这是为什么？是因为什么东东被裁剪掉了吗，我应该怎么解决才好呢？
我的目标是输出webgl的包

[jaegerwang]

刚才以为是 Strip EngineCode导致的，但是关闭了之后，依然是相同的问题：

[jaegerwang]

我解决了这个问题
我参考了这个issue：
#980

我将Example/ExampleGenConfig.cs复制到我的项目下，并且注释掉了 UNITY_ANDROID 宏：

    //黑名单
    [BlackList]
    public static List<List<string>> BlackList = new List<List<string>>()  {
                new List<string>(){"System.Xml.XmlNodeList", "ItemOf"},
                new List<string>(){"UnityEngine.WWW", "movie"},
    #if UNITY_WEBGL
                new List<string>(){"UnityEngine.WWW", "threadPriority"},
    #endif
                new List<string>(){"UnityEngine.Texture2D", "alphaIsTransparency"},
                new List<string>(){"UnityEngine.Security", "GetChainOfTrustValue"},
                new List<string>(){"UnityEngine.CanvasRenderer", "onRequestRebuild"},
                new List<string>(){"UnityEngine.Light", "areaSize"},
                new List<string>(){"UnityEngine.Light", "lightmapBakeType"},
    #if UNITY_ANDROID || UNITY_WEBGL
                new List<string>(){"UnityEngine.Light", "SetLightDirty"},
                new List<string>(){"UnityEngine.Light", "shadowRadius"},
                new List<string>(){"UnityEngine.Light", "shadowAngle"},
    #endif
                new List<string>(){"UnityEngine.WWW", "MovieTexture"},
                new List<string>(){"UnityEngine.WWW", "GetMovieTexture"},
                new List<string>(){"UnityEngine.AnimatorOverrideController", "PerformOverrideClipListCleanup"},
    #if !UNITY_WEBPLAYER
                new List<string>(){"UnityEngine.Application", "ExternalEval"},
    #endif
                new List<string>(){"UnityEngine.GameObject", "networkView"}, //4.6.2 not support
                new List<string>(){"UnityEngine.Component", "networkView"},  //4.6.2 not support
                new List<string>(){"System.IO.FileInfo", "GetAccessControl", "System.Security.AccessControl.AccessControlSections"},
                new List<string>(){"System.IO.FileInfo", "SetAccessControl", "System.Security.AccessControl.FileSecurity"},
                new List<string>(){"System.IO.DirectoryInfo", "GetAccessControl", "System.Security.AccessControl.AccessControlSections"},
                new List<string>(){"System.IO.DirectoryInfo", "SetAccessControl", "System.Security.AccessControl.DirectorySecurity"},
                new List<string>(){"System.IO.DirectoryInfo", "CreateSubdirectory", "System.String", "System.Security.AccessControl.DirectorySecurity"},
                new List<string>(){"System.IO.DirectoryInfo", "Create", "System.Security.AccessControl.DirectorySecurity"},
                new List<string>(){"UnityEngine.MonoBehaviour", "runInEditMode"},
            };

随后重新生成，重新编译即可