Unity 热更新方案和流程

在开发商业游戏时，热更新是一个很重要的模块，这里讲的热更新不是指仅仅修复Bug，而是进行游戏功能的更新。简单来讲，就是启动游戏后，跑个条，下载资源和代码，然后再进入游戏。本篇博客所写的内容并不是最优的解，只是完成了热更新这个事情而已，具体使用还需要使用者根据自己的项目来具体来看。

这里采用的方案是使用 AssetBundle 和 xLua。使用 AssetBundle 是为了资源的完全自主控制。而整个游戏的逻辑部分，则使用 xLua 来实现。当然，C# 的代码不可能一点没有，只是一些核心的功能模块，一般写好后就不会改变的东西，或者对性能要求很高的东西，放在 C# 就可以。

整个功能分为编辑器部分，和运行时部分。编辑器部分就是编 Bundle，生成版本文件等。而运行时部分就是从 CDN 下载版本文件，对比版本号及本地资源是否有要更新的，如果有，则更新，更新完后进入游戏。没有，则直接进入游戏。

编辑器部分

编辑器部分主要就是生成 Bundle 文件，首先，我是按目录来划分 Bundle 的，任何一个目录下的文件（不包括子目录）则会打成一个 Bundle。例如下面的目录结构

Res/
    - ConfigBytes/
    - UI/
    - LuaScripts/
    - Data/
        - ItemsData/
        - CharactersData/

首先 Res 目录是资源的主目录，下面有各种子目录（Res 目录下不会有需要打 Bundle 的文件）。ConfigBytes 目录下的文件，会打成一个 Bundle。UI 目录下的文件会打成一个 Bundle。LuaScripts 目录下的文件会打成一个 Bundle。Data 目录下的 ItemsData 目录中的文件会打成一个 Bundle，Data 目录下的 CharactersData 目录会打成一个Bundle。如果 Data 目录下存在文件（非目录），则这些文件会打成一个 Bundle。简单来讲，就是会按文件夹来决定哪些文件打成一个Bundle，检查的时候只会取一个文件夹下的文件，而不会递归取这个文件夹下的子目录。

LuaScripts 目录在开发时会放在 Assets 目录外面，与其同级，在编 Bundle 时，会拷贝 LuaScripts 目录及下面的所有文件，按原有目录结构，拷贝到 Res 目录中，并且会将每一个 xxx.lua 文件的扩展名改为 xxx.txt。因为 .lua 在 Unity 中识别不了。

打 Bundle 的脚本，会记录每一个资源，所在的 Bundle 名称，最后会生成一个 index.json 文件，这份索引文件记录的，就是每一个资源的加载路径，和所在的 Bundle 名。

Bundle 输出后，会生成一个 version.json 的文件，这个文件，记录了每一个 Bundle 的名字，MD5 和 文件大小。而热更新对比一个文件是否需要更新，就是判断远程文件的 MD5 与本地文件的 MD5 是否相同，如果不想同，则需要更新远程文件。

以上就是编辑器所做的事情，总结一下就是

1. 拷贝 LuaScripts 到 Assets/Res/ 目录中

2. 将 Res/ 目录下的文件按目录进行 Bundle 生成

3. 生成资源索引文件(index.json)，并且将这个文件也打成 Bundle

4. 根据生成的 Bundle，生成 version.json 文件

5. 拷贝上面的 Bundle 及 version.json 文件到 StreamingAssets 目录

6. 将上面的 Bundle 及 version.json 文件上传到远程服务器或 CDN

第 5 步，之所以是要拷贝到 StreamingAssets 目录，是为了用户在第一次安装游戏时，运行时逻辑会先判断本地有没有资源，如果没有，或者版本号小于 StreamingAssets 中的 version.json 文件版本号，则需要将 StreamingAssets 目录下的 Bundle 及 version.json 文件拷贝到 Persistent 目录下，这样就不用第一次安装游戏，还需要跑条更新资源了。当然，虽然有了这个过程，拷贝完后，正常的版本检查还是会做。

以上就是编辑器下做的事情，下面为运行时的流程

运行时资源更新部分

版本检查及更新逻辑，可以放在一个独立的场景中去进行，一旦更新完成后，就直接跳转场景到游戏启动场景，这个逻辑比较简单清晰，不容易出错。

在游戏启动时，首先会去远程拉取 version.json 文件，然后根据 version.json 文件中的版本号与本地 version.json 文件中的版本号进行对比。如果不一样，则需要根据 version.json 文件中的 Bundle 信息，看一下哪一些 Bundle 需要更新，找到需要更新的 Bundle 后，依次下载始可。因为 version.json 中包含了每一个 Bundle 的文件大小，所以这里的下载进度条的进度，也是可以计算出来的。

在对比版本号时，需要根据自己游戏的实际进行，分为大版本号和热更新版本号，如果大版本号不一样，则直接不用判断 Bundle 了，让用户进不了游戏，弹窗告诉用户去下载最新的安装包即可。如果大版本一样，则进行热更新的逻辑。这里的大版本判断，不当要根据 version.json 文件里的版本号来判断，最好是根据包里代码中或者包里的某个配置文件中的版本号来判断，因为 version.json 文件是在手机的可读写目录，对于 Android 来说，是很容易随意找到这个文件，然后改掉的，从而绕过热更新。

在 Bundle 都下载完后，需要将远程的 version.json 文件写入本地，覆盖本地的 version.json 文件。

最后，再进行一步本地资源校对，就是计算每一个本地 Bundle MD5，是否与 version.json 中的 MD5 一致，如果不一致，则需要弹窗告诉玩家需要手动修复资源，或者直接自动下载覆盖。手动修复也就是从远程重新下载资源进行覆盖。

最后一步资源校对通过后，则跳到游戏逻辑开始场景。

我是将版本检查和更新的逻辑放在了 C# 实现的，当然，也可以放在 lua 来实现，不过需要在更新完后，重新创建整个 lua 环境，以保证使用了最新的资源。

运行时资源加载部分

资源的加载，可以使用一个资源管理器脚本来实现。资源管理器在初始化时首先要加载 Bundle 的 AssetBundleManifest 信息，这个资源里记录了各个 Bundle 与其他 Bundle 的依赖关系。然后加载 index 文件，也就是我们一开始生成的资源索引文件，这样才能知道哪一个资源，在哪一个 Bundle 里。当要加载一个资源时，传入资源加载路径，首先会根据 index 文件中的信息，找到这个 Bundle，然后从 Manifest 信息中，读取这个 Bundle 的依赖 Bundle，如果有，则先加载依赖，最后，再加载当前 Bundle。Bundle加载完后，从 Bundle 中加载资源。

具体代码（仅供参考）

AssetBundleBuilder.cs 编辑器下编 Bundle 的代码

using System.Collections.Generic;
using UnityEngine;
using UnityEditor;
using UnityEditor.Build;
using System;
using System.IO;
using System.Text;
using System.Linq;
using System.Xml.Linq;
using System.Security.Cryptography;
using UnityEditor.Build.Reporting;

// 注意：BundleCombineConfig.json 中的配置，目录最后！不要！加上 '/'publicclassAssetBundleBuilder{
privatestaticstring RES_TO_BUILD_PATH = "Assets/Res/";
privatestaticstring MANIFEST_FILES_PATH = string.Format("{0}/../BundleManifest/", Application.dataPath);
privatestatic StringBuilder IndexFileContent = null;
privatestatic StringBuilder VersionFileContent = null;
privatestatic MD5 md5 = null;
privatestatic BuildAssetBundleOptions BuildOption = BuildAssetBundleOptions.ChunkBasedCompression |
                                                        BuildAssetBundleOptions.ForceRebuildAssetBundle;

privatestatic BundleCombineConfig combineConfig = null;
privatestatic Dictionary<string, int> combinePathDict = null;

privatestaticstring version = "0.0.0";
privatestaticbool copyToStreaming = false;

private static voidInitBuilder()    {
        IndexFileContent = new StringBuilder();
        VersionFileContent = new StringBuilder();
        md5 = new MD5CryptoServiceProvider();
        combineConfig = null;
        combinePathDict = new Dictionary<string, int>();
    }

private static voidWriteIndexFile(string key, string value)    {
        IndexFileContent.AppendFormat("{0}:{1}", key, value);
        IndexFileContent.AppendLine();
    }

private static voidWriteVersionFile(string key, string value1, long value2)    {
        VersionFileContent.AppendFormat("{0}:{1}:{2}", key, value1, value2);
        VersionFileContent.AppendLine();
    }

private static longGetFileSize(string fileName)    {
try        {
            FileInfo fileInfo = new FileInfo(fileName);
return fileInfo.Length;
        }
catch (Exception ex)
        {
thrownew Exception("GetFileSize() fail, error:" + ex.Message);
        }
    }

private static stringGetMD5(byte[] retVal)    {
        StringBuilder sb = new StringBuilder();
for (int i = 0; i < retVal.Length; i++)
        {
            sb.Append(retVal[i].ToString("x2"));
        }
return sb.ToString();
    }

private static stringGetMD5HashFromFile(string fileName)    {
try        {
            FileStream file = new FileStream(fileName, FileMode.Open);
byte[] retVal = md5.ComputeHash(file);
            file.Close();

return GetMD5(retVal);
        }
catch (Exception ex)
        {
thrownew Exception("GetMD5HashFromFile() fail, error:" + ex.Message);
        }
    }

static stringGetBundleName(string path)    {
byte[] md5Byte = md5.ComputeHash(Encoding.Default.GetBytes(path));
string str = GetMD5(md5Byte) + ".assetbundle";
return str;
    }
privateclassBuildBundleData    {
private AssetBundleBuild build = new AssetBundleBuild();
privateList<string> assets = new List<string>();
privateList<string> addresses = new List<string>();

publicBuildBundleData(string bundleName)        {
            build.assetBundleName = bundleName;
        }

public voidAddAsset(string filePath)        {
string addressableName = GetAddressableName(filePath);
            assets.Add(filePath);
            addresses.Add(addressableName);
            WriteIndexFile(addressableName, build.assetBundleName);
        }

public AssetBundleBuild Gen()        {
            build.assetNames = assets.ToArray();
            build.addressableNames = addresses.ToArray();
return build;
        }
    }

private static stringGetAddressableName(string file_path)    {
string addressable_name = file_path;
        addressable_name = addressable_name.Replace(RES_TO_BUILD_PATH, "");
int dot_pos = addressable_name.LastIndexOf('.');
if (dot_pos != -1)
        {
int count = addressable_name.Length - dot_pos;
            addressable_name = addressable_name.Remove(dot_pos, count);
        }
return addressable_name;
    }

private static string[] GetTopDirs(string rPath)    {
return Directory.GetDirectories(rPath, "*", SearchOption.TopDirectoryOnly);
    }

private static voidCopyLuaDir()    {
// Copy Luastring luaOutPath = Application.dataPath + "/../LuaScripts";
string luaInPath = Application.dataPath + "/Res/LuaScripts";

        DeleteLuaDir();

        MoeUtils.DirectoryCopy(luaOutPath, luaInPath, true, ".txt");
        AssetDatabase.Refresh();
    }

private static voidDeleteLuaDir()    {
string luaInPath = Application.dataPath + "/Res/LuaScripts";

if (Directory.Exists(luaInPath))
        {
            Directory.Delete(luaInPath, true);
        }
    }

public static voidBuildBundleWithVersion(string v, bool copy)    {
        version = v;
        copyToStreaming = copy;
        BuildAssetBundle();
    }

    [MenuItem("Tools/Build Bundles")]private static voidBuildAssetBundle()    {
if (version == "0.0.0")
        {
            Debug.LogErrorFormat("请确认版本号");
return;
        }
        CopyLuaDir();

        InitBuilder();
        LoadBundleCombineConfig();
        Dictionary<string, BuildBundleData> bundleDatas = new Dictionary<string, BuildBundleData>();
        IndexFileContent.Clear();
        VersionFileContent.Clear();

        List<DirBundleInfo> dirList = new List<DirBundleInfo>();

// ============================        Queue<DirBundleInfo> dirQueue = new Queue<DirBundleInfo>();
        dirQueue.Enqueue(new DirBundleInfo(RES_TO_BUILD_PATH));
while (dirQueue.Count > 0)
        {
            DirBundleInfo rootDirInfo = dirQueue.Dequeue();
if (rootDirInfo.dir != RES_TO_BUILD_PATH)
            {
if (combinePathDict.ContainsKey(rootDirInfo.dir))
                {
                    rootDirInfo.combine2Dir = rootDirInfo.dir;
                }
                dirList.Add(rootDirInfo);
            }

foreach (string subDir inGetTopDirs(rootDirInfo.dir))            {
                DirBundleInfo subDirInfo = new DirBundleInfo(subDir);
                subDirInfo.combine2Dir = rootDirInfo.combine2Dir;
                dirQueue.Enqueue(subDirInfo);

                Debug.LogFormat("Dir: {0}, Combine2Dir: {1}", subDirInfo.dir, subDirInfo.combine2Dir);
            }
        }

foreach (DirBundleInfo dirInfo in dirList)
        {
string[] files = GetFiles(dirInfo.dir, SearchOption.TopDirectoryOnly);
if (files.Length > 0)
            {
                Debug.LogFormat("Dir: {0}, FileCount: {1}", dirInfo.dir, files.Length);
string bundleDirName = dirInfo.BundleDirName;
                BuildBundleData bbData = null;
if (bundleDatas.ContainsKey(bundleDirName))
                {
                    bbData = bundleDatas[bundleDirName];
                }
else                {
                    bbData = new BuildBundleData(GetBundleName(bundleDirName));
                    bundleDatas.Add(bundleDirName, bbData);
                }

foreach (string file in files)
                {
                    bbData.AddAsset(file);
                }
            }
        }

        List<AssetBundleBuild> bundleBuildList = new List<AssetBundleBuild>();
foreach (BuildBundleData data in bundleDatas.Values)
        {
            bundleBuildList.Add(data.Gen());
        }

string index_file_path = string.Format("{0}{1}.txt", RES_TO_BUILD_PATH, "index");
        File.WriteAllText(index_file_path, IndexFileContent.ToString());
        AssetDatabase.ImportAsset(index_file_path);
        AssetDatabase.SaveAssets();
        AssetDatabase.Refresh();

        AssetBundleBuild indexBuild = new AssetBundleBuild();
        indexBuild.assetBundleName = "index";
        indexBuild.assetNames = newstring[] { index_file_path };
        indexBuild.addressableNames = newstring[] { "index" };
        bundleBuildList.Add(indexBuild);
string bundleExportPath = string.Format("{0}/{1}/", Application.dataPath + "/../streaming", "Bundles");
if (Directory.Exists(bundleExportPath))
        {
            Directory.Delete(bundleExportPath, true);
        }
        Directory.CreateDirectory(bundleExportPath);

if (Directory.Exists(MANIFEST_FILES_PATH))
        {
            Directory.Delete(MANIFEST_FILES_PATH, true);
        }
        Directory.CreateDirectory(MANIFEST_FILES_PATH);

        BuildPipeline.BuildAssetBundles(bundleExportPath, bundleBuildList.ToArray(), BuildOption, EditorUserBuildSettings.activeBuildTarget);
        AssetDatabase.Refresh();
        DeleteLuaDir();
        AssetDatabase.Refresh();

// VersionProfile
        List<VersionBundleInfo> versionBundleList = new List<VersionBundleInfo>();
        MoeVersionInfo versionInfo = new MoeVersionInfo();
        versionInfo.version = version;
        versionInfo.asset_date = DateTime.Now.ToString("yyyyMMddHHmm");
string[] ab_files = Directory.GetFiles(bundleExportPath);
foreach (string ab_file in ab_files)
        {
if (Path.GetExtension(ab_file) == ".manifest")
            {
string new_path = ab_file.Replace(bundleExportPath, MANIFEST_FILES_PATH);
                File.Move(ab_file, new_path);
            }
else            {

                Debug.LogFormat("BundleName: {0}", ab_file);
var data = File.ReadAllBytes(ab_file);
using (var abStream = new AssetBundleStream(ab_file, FileMode.Create))
                {
                    abStream.Write(data, 0, data.Length);
                }

string md5 = GetMD5HashFromFile(ab_file);
long size = GetFileSize(ab_file);
string bundleName = string.Format("Bundles/{0}", Path.GetFileName(ab_file));
                VersionBundleInfo bInfo = new VersionBundleInfo();
                bInfo.bundle_name = bundleName;
                bInfo.md5 = md5;
                bInfo.size = size;
                versionBundleList.Add(bInfo);
            }
        }

        versionInfo.bundles = versionBundleList.ToArray();
string versionInfoText = Newtonsoft.Json.JsonConvert.SerializeObject(versionInfo);

        File.WriteAllText(string.Format("{0}/{1}", bundleExportPath, "version.json"), versionInfoText);

if (copyToStreaming)
        {
            CopyBundleToStreaming(bundleExportPath);
        }
        MoveToVersionDir(bundleExportPath, version);
        AssetDatabase.Refresh();
    }

private static voidMoveToVersionDir(string rootBundlePath, string version)    {
string destPath = rootBundlePath + "/" + version;
        Directory.CreateDirectory(destPath);
        destPath += "/Bundles";
        Directory.CreateDirectory(destPath);

string[] files = GetFiles(rootBundlePath, SearchOption.TopDirectoryOnly);
foreach (string file in files)
        {
string fileName = System.IO.Path.GetFileName(file);
string destFilePath = destPath + "/" + fileName;
            File.Move(file, destFilePath);
        }
    }

private static voidCopyBundleToStreaming(string bundleExportPath)    {
string destPath = Application.streamingAssetsPath + "/Bundles";
if (Directory.Exists(destPath))
        {
            Directory.Delete(destPath, true);
        }

        MoeUtils.DirectoryCopy(bundleExportPath, destPath, true);
    }

private static string[] GetFiles(string path, SearchOption so)    {
string[] files = Directory.GetFiles(path, "*", so);
        List<string> fileList = new List<string>();
foreach (string file in files)
        {
string ext = Path.GetExtension(file);
if (ext == ".meta" || ext == ".DS_Store")
            {
continue;
            }
            fileList.Add(file);
        }

return fileList.ToArray();
    }

classDirBundleInfo    {
publicstring dir;
publicstring combine2Dir;

publicbool IsCombine
        {
get            {
return !string.IsNullOrEmpty(combine2Dir);
            }
        }

publicstring BundleDirName
        {
get            {
if (IsCombine)
                {
return combine2Dir;
                }
else                {
return dir;
                }
            }
        }

publicDirBundleInfo(string dir, string combine2Dir = null)        {
this.dir = dir;
this.combine2Dir = combine2Dir;
        }

    }

classBundleCombineConfig    {
publicstring[] combieDirs;
    }

private static voidLoadBundleCombineConfig()    {
string path = Application.dataPath + RES_TO_BUILD_PATH.Replace("Assets", "") + "BundleCombineConfig.json";
if (File.Exists(path))
        {
string text = File.ReadAllText(path);
if (!string.IsNullOrEmpty(text))
            {
                combineConfig = Newtonsoft.Json.JsonConvert.DeserializeObject<BundleCombineConfig>(text);
if (combineConfig != null)
                {
                    Debug.LogFormat("Bundle合并配置成功！");
foreach (string cPath in combineConfig.combieDirs)
                    {
if (!combinePathDict.ContainsKey(cPath))
                        {
                            combinePathDict.Add(cPath, 0);
                        }
                    }
                }
            }
        }
    }
}

MoeVersionManager.cs 资源版本检查及 Bundle 更新逻辑

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using BestHTTP;
using System;

publicclassMoeVersionManager : MoeSingleton<MoeVersionManager>
{
conststring REMOTE_URL = "这里改成自己的CDN域名或IP";
staticstring VERSION_FILE_DIR;
staticstring VERSION_FILE_PATH;
staticstring IN_VERSION_FILE_PATH;

private MoeVersionInfo currVersionInfo = null;
private MoeVersionInfo remoteVersionInfo = null;
private UpdateInfo updateInfo = null;

privatestatic OnVersionStateParam versionStateParam = new OnVersionStateParam();
privatestatic OnUpdateProgressParam updateProgressParam = new OnUpdateProgressParam();
privatestatic OnVersionMsgBoxParam msgBoxParam = new OnVersionMsgBoxParam();

privateenum EnProcessType
    {
        Normal,
        Fix,
    }

private Action<EnProcessType> actionTryUnCompress = null;
private Action<EnProcessType> actionUpdateVersionFile = null;
private Action<EnProcessType> actionUpdateBundles = null;
private Action<EnProcessType> actionCheckAssets = null;
private Action<EnProcessType> actionForceUpdateVersionFile = null;



protected override voidInitOnCreate()    {
        VERSION_FILE_DIR = Application.persistentDataPath + "/Bundles/";
        VERSION_FILE_PATH = Application.persistentDataPath + "/Bundles/version.json";
        IN_VERSION_FILE_PATH = Application.streamingAssetsPath + "/Bundles/version.json";
        Debug.LogFormat("{0}", VERSION_FILE_PATH);
        InitProcessChain();
        StartNormalProcess();
    }


private voidInitProcessChain()    {
this.actionTryUnCompress = (EnProcessType param) =>
        {
            Debug.LogFormat("Action>>> 解压: {0}", param);
this.currVersionInfo = LoadVersionInfo(VERSION_FILE_PATH);
// if (!CheckBundleCorrect())if (currVersionInfo == null)
            {
                UpdateUIState("正在解压资源");
                UnCompressBundle();
this.currVersionInfo = LoadVersionInfo(VERSION_FILE_PATH);
            }
else            {
// 判断是不是更新包，也就是StreamingAssets里的版本是否比Persistent版本高，如果高的话，再次解压Bundle                MoeVersionInfo inVersionInfo = LoadVersionInfo(IN_VERSION_FILE_PATH);
if (inVersionInfo != null)
                {
int[] inVersionDigit = inVersionInfo.GetVersionDigitArray();
int[] currVersionDigit = this.currVersionInfo.GetVersionDigitArray();
// if (inVersionInfo.GetVersionLong() > this.currVersionInfo.GetVersionLong())if (inVersionDigit[0] > currVersionDigit[0] ||
                       inVersionDigit[1] > currVersionDigit[1] ||
                       inVersionDigit[2] > currVersionDigit[2])
                    {
// 包里的版本比Persistent的版本高，可能玩家进行了大版本更新，重新解压                        Debug.LogFormat("包里的Bundle版本 > Persistent Bundle 版本，重新解压");
                        UpdateUIState("正在解压资源");
                        UnCompressBundle();
this.currVersionInfo = LoadVersionInfo(VERSION_FILE_PATH);
                    }
else                    {
                        Debug.LogFormat("包里Bundle版本 <= Persistent Bundle版本，无需解压~");
                    }
                }
else                {
                    Debug.LogErrorFormat("逻辑错误，从StreamingAssets 中加载VersionInfo文件失败");
                }
            }
        };

this.actionUpdateVersionFile = (EnProcessType param) =>
        {
            Debug.LogFormat("Action>>> 获取远程版本文件: {0}", param);
            StartCoroutine(TryUpdateVersion((bool ok, bool majorUpdate) =>
            {
if (ok)
                {
if (majorUpdate)
                    {
// 调用商店                        OnMsgBox("新的大版本已更新，请下载最新安装包！", "确定", () =>
                        {
                            JumpToDownloadMarket();
                        });
                    }
else                    {
// 成功了，接下来更新Bundlethis.actionUpdateBundles?.Invoke(param);
                    }
                }
else                {
// 版本文件更新失败，弹窗询问                    OnMsgBox("版本信息获取失败，请检查网络连接！", "重试", () =>
                    {
this.actionUpdateVersionFile?.Invoke(param);
                    });
                }
            }));
        };

this.actionForceUpdateVersionFile = (EnProcessType param) =>
        {
            Debug.LogFormat("Action>>> 强制获取远程版本文件: {0}", param);
            TryDeleteBundleDir();
            TryCreateBundleDir();
            StartCoroutine(TryUpdateVersion((bool ok, bool majorUpdate) =>
            {
if (ok)
                {
if (majorUpdate)
                    {
// 调用商店                        OnMsgBox("新的大版本已更新，请下载最新安装包！", "确定", () =>
                        {
                            JumpToDownloadMarket();
                        });
                    }
else                    {
// 成功了，接下来更新Bundlethis.actionUpdateBundles?.Invoke(param);
                    }
                }
else                {
// 版本文件更新失败，弹窗询问                    OnMsgBox("版本信息获取失败，请检查网络连接！", "重试", () =>
                    {
this.actionForceUpdateVersionFile?.Invoke(param);
                    });
                }
            }, true));
        };

this.actionUpdateBundles = (EnProcessType param) =>
        {
            Debug.LogFormat("Action>>> 更新Bundle: {0}", param);
            StartCoroutine(TryUpdateBundle((bool ok) =>
            {
if (ok)
                {
// 成功了，接下来检查资源，this.actionCheckAssets?.Invoke(param);
                }
else                {
                    OnMsgBox("资源下载失败，请检查网络连接！", "重试", () =>
                    {
this.actionUpdateBundles(param);
                    });
                }
            }));
        };

this.actionCheckAssets = (EnProcessType param) =>
        {
            Debug.LogFormat("Action>>> 校对资源: {0}", param);
if (!CheckBundleCorrect())
            {
// 更新完了，本地Bundle还是不对                Debug.LogFormat("更新完Bundle后，发现文件不对");
if (param == EnProcessType.Normal)
                {
                    OnMsgBox("资源有错误，请修复客户端！", "修复", () =>
                    {
this.actionForceUpdateVersionFile?.Invoke(EnProcessType.Fix);
                    });
                }
else                {
                    OnMsgBox("客户端修复失败，请重新下载安装包！", "确定", () =>
                    {
                        JumpToDownloadMarket();
                    });
                }
            }
else            {
                UpdateUIState("进入游戏");
                MoeEventManager.Inst.SendEvent(EventID.Event_OnUpdateEnd);
            }
        };
    }



// 跳转到下载商店private voidJumpToDownloadMarket()    {
        Application.OpenURL("https://taptap.com");
    }

private voidStartNormalProcess()    {
        TryCreateBundleDir();
this.actionTryUnCompress?.Invoke(EnProcessType.Normal);
this.actionUpdateVersionFile?.Invoke(EnProcessType.Normal);
    }

private voidStartFixProcess()    {
this.actionForceUpdateVersionFile(EnProcessType.Fix);
    }


private MoeVersionInfo LoadVersionInfo(string path)    {
        Debug.LogFormat("加载 Version 文件: {0}", path);
try        {
if (System.IO.File.Exists(path))
            {
string text = System.IO.File.ReadAllText(path);
if (!string.IsNullOrEmpty(text))
                {
                    MoeVersionInfo vInfo = Newtonsoft.Json.JsonConvert.DeserializeObject<MoeVersionInfo>(text);
if (vInfo != null)
                    {
                        Debug.LogFormat("Version 信息加载成功: {0}", vInfo.version);
return vInfo;
                    }
                }
else                {
                    Debug.LogFormat("Version 文件内容为空");
                }
            }
else            {
                Debug.LogFormat("Version 文件不存在");
            }
        }
catch (System.Exception e)
        {
            Debug.LogErrorFormat("读取Version文件出错: {0}", e.ToString());
        }

returnnull;
    }

///<summary>/// 从 StreamingAssets 里将Bundle拷贝到 Persistent 目录里 ///</summary>private voidUnCompressBundle()    {
        TryDeleteBundleDir();
        TryCreateBundleDir();
        Debug.LogFormat("尝试从 Steaming 拷贝Bundle 到 Persistent");
try        {
if (System.IO.File.Exists(IN_VERSION_FILE_PATH))
            {
string text = System.IO.File.ReadAllText(IN_VERSION_FILE_PATH);
                Debug.LogFormat("Text: {0}", text);
                MoeVersionInfo inVersionInfo = Newtonsoft.Json.JsonConvert.DeserializeObject<MoeVersionInfo>(text);
if (inVersionInfo != null)
                {
// 拷贝 Bundleforeach (VersionBundleInfo bundleInfo in inVersionInfo.bundles)
                    {
string srcFilePath = string.Format("{0}/{1}", Application.streamingAssetsPath, bundleInfo.bundle_name);
string destFilePath = string.Format("{0}/{1}", Application.persistentDataPath, bundleInfo.bundle_name);
                        Debug.LogFormat("拷贝Bundle， {0} -> {1}", srcFilePath, destFilePath);
                        System.IO.File.Copy(srcFilePath, destFilePath, true);
                    }

// 拷贝 Version文件                    System.IO.File.Copy(IN_VERSION_FILE_PATH, VERSION_FILE_PATH, true);
                }
            }
else            {
                Debug.LogErrorFormat("解压失败，StreamingAssets 中没有 Version 文件");
            }
        }
catch (System.Exception e)
        {
            Debug.LogErrorFormat("Bundle拷贝出错! {0}", e.ToString());
        }
    }

public voidTryCreateBundleDir()    {
if (!System.IO.Directory.Exists(VERSION_FILE_DIR))
        {
            Debug.LogFormat("创建 Persistent Bundle 目录");
            System.IO.Directory.CreateDirectory(VERSION_FILE_DIR);
        }
else        {
            Debug.LogFormat("Persistent Bundle 目录已存在，不需要创建");
        }
    }

public voidTryDeleteBundleDir()    {
if (System.IO.Directory.Exists(VERSION_FILE_DIR))
        {
            System.IO.Directory.Delete(VERSION_FILE_DIR, true);
        }
    }

private stringGetLocalBundleMD5(string bundle_name)    {
string bundleFilePath = string.Format("{0}/{1}", Application.persistentDataPath, bundle_name);
if (System.IO.File.Exists(bundleFilePath))
        {
string md5 = MoeUtils.GetMD5HashFromFile(bundleFilePath);
return md5;
        }

returnnull;
    }

///<summary>/// 检查当前的Bundle是否正确 ///</summary>///<returns></returns>public boolCheckBundleCorrect()    {
if (currVersionInfo != null)
        {
foreach (VersionBundleInfo bundleInfo in currVersionInfo.bundles)
            {
string bundleFilePath = string.Format("{0}/{1}", Application.persistentDataPath, bundleInfo.bundle_name);
bool matched = false;

if (GetLocalBundleMD5(bundleInfo.bundle_name) == bundleInfo.md5)
                {
                    matched = true;
                }
else                {
                    Debug.LogErrorFormat("MD5 不匹配： {0}, FileMD5: {1}, bInfoMD5: {2}", bundleInfo.bundle_name, GetLocalBundleMD5(bundleInfo.bundle_name), bundleInfo.md5);
                }

if (!matched)
                {
returnfalse;
                }
            }

            Debug.LogFormat("本地Bundle文件检完全正确");
returntrue;
        }
else        {
returnfalse;
        }
    }

///<summary>//</summary>///<param name="callback"><是否成功，是否是强更></param>///<param name="force"></param>///<returns></returns>private IEnumerator TryUpdateVersion(System.Action<bool, bool> callback, bool force = false)    {
        UpdateUIState("正在检查更新");
this.remoteVersionInfo = null;
this.updateInfo = null;
string remoteVersionUrl = REMOTE_URL + "/fishing/version.json";
        Debug.LogFormat("开始下载远程 Version 文件: {0}", remoteVersionUrl);
        HTTPRequest request = new HTTPRequest(new System.Uri(remoteVersionUrl), false, true, null).Send();

while (request.State < HTTPRequestStates.Finished)
        {
yield return newWaitForSeconds(0.1f);
        }

if (request.State == HTTPRequestStates.Finished &&
         request.Response.IsSuccess)
        {
string remoteVersionText = request.Response.DataAsText;
if (!string.IsNullOrEmpty(remoteVersionText))
            {
                MoeVersionInfo remoteVersionInfo = Newtonsoft.Json.JsonConvert.DeserializeObject<MoeVersionInfo>(remoteVersionText);
if (remoteVersionInfo != null)
                {
                    Debug.LogFormat("远程 Version 文件解析成功, Version: {0}", remoteVersionInfo.version);
// 判断是否要更新
int appMajorVersion = AppConfig.Inst.GetMajorVersion();
// 判断是否要强更int remoteMajor = remoteVersionInfo.GetMajorVersion();
if (remoteMajor > appMajorVersion)
                    {
// 这是一个需要强更的版本，需要提示用户去商店下载                        Debug.LogFormat("发现强更版本，需要重新下包，进行大版本更新!");
                        callback?.Invoke(true, true);
                        callback = null;

                        UpdateUIState("新的大版本已更新，请下载最新安装包！");
                    }
else                    {
// 强制修复if (force)
                        {
this.remoteVersionInfo = remoteVersionInfo;
                            List<VersionBundleInfo> updateBundleList = new List<VersionBundleInfo>();
                            updateBundleList.AddRange(remoteVersionInfo.bundles);
// 有需要更新的包this.updateInfo = new UpdateInfo();
this.updateInfo.remoteVersionInfo = remoteVersionInfo;
this.updateInfo.updateBundleList = updateBundleList;
                            Debug.LogFormat("强制更新，有需要更新的Bundle");
                            callback?.Invoke(true, false);
                            callback = null;
                        }
else                        {
// 正常更新int[] remoteVersionDigit = remoteVersionInfo.GetVersionDigitArray();
int[] currVersionDigit = this.currVersionInfo == null ? newint[] { 0, 0, 0 } : this.currVersionInfo.GetVersionDigitArray();
// if (this.currVersionInfo == null || remoteVersionInfo.GetVersionLong() > this.currVersionInfo.GetVersionLong())if (remoteVersionDigit[0] > currVersionDigit[0] ||
                               remoteVersionDigit[1] > currVersionDigit[1] ||
                               remoteVersionDigit[2] > currVersionDigit[2])
                            {
                                Debug.LogFormat("这次需要热更新");
this.remoteVersionInfo = remoteVersionInfo;
                                List<VersionBundleInfo> updateBundleList = new List<VersionBundleInfo>();

foreach (VersionBundleInfo rBInfo in remoteVersionInfo.bundles)
                                {
if (GetLocalBundleMD5(rBInfo.bundle_name) != rBInfo.md5)
                                    {
                                        updateBundleList.Add(rBInfo);
                                    }
                                }

// 有需要更新的包this.updateInfo = new UpdateInfo();
this.updateInfo.remoteVersionInfo = remoteVersionInfo;
this.updateInfo.updateBundleList = updateBundleList;
                                Debug.LogFormat("有需要更新的Bundle");
                                callback?.Invoke(true, false);
                                callback = null;
                            }
else                            {
                                Debug.LogFormat("远程版本号 {0} <= 本地版本号 {1}，无需更新!", remoteVersionInfo.version, this.currVersionInfo.version);
                                callback?.Invoke(true, false);
                                callback = null;
                            }
                        }
                    }
                }
else                {
                    Debug.LogErrorFormat("远程 Version 文件反序列化失败: {0}", remoteVersionText);
                }
            }
else            {
                Debug.LogErrorFormat("远程 Version 文件内容为空");
            }
        }
else        {
            Debug.LogErrorFormat("远程 Version 文件下载失败: {0}, {1}", request.State, request.Response.StatusCode);
        }

        BestHTTP.PlatformSupport.Memory.BufferPool.Release(request.Response.Data);
        callback?.Invoke(false, false);
    }

private IEnumerator TryUpdateBundle(System.Action<bool> callback)    {
if (this.remoteVersionInfo != null && this.updateInfo != null)
        {
long totalSize = 0;
foreach (VersionBundleInfo bInfo inthis.updateInfo.updateBundleList)
            {
                totalSize += bInfo.size;
            }

            UpdateUIDownload(totalSize, 0);
long downloadedSize = 0;
bool hasError = false;

foreach (VersionBundleInfo bInfo inthis.updateInfo.updateBundleList)
            {
                Debug.LogFormat("Bundle信息 {0} | {1}", GetLocalBundleMD5(bInfo.bundle_name), bInfo.md5);
if (GetLocalBundleMD5(bInfo.bundle_name) != bInfo.md5)
                {
string remoteBundleUrl = string.Format("{0}/fishing/{1}/{2}", REMOTE_URL, this.updateInfo.remoteVersionInfo.version, bInfo.bundle_name);
                    Debug.LogFormat("开始更新Bundle: {0}", remoteBundleUrl);
                    HTTPRequest request = new HTTPRequest(new System.Uri(remoteBundleUrl), false, true, null).Send();
while (request.State < HTTPRequestStates.Finished)
                    {

yield return newWaitForSeconds(0.1f);
                    }

if (request.State == HTTPRequestStates.Finished && request.Response.IsSuccess)
                    {
                        downloadedSize += bInfo.size;
string bundleWritePath = Application.persistentDataPath + "/" + bInfo.bundle_name;
// 写入Bundle文件                        System.IO.File.WriteAllBytes(bundleWritePath, request.Response.Data);
                        Debug.LogFormat("{0} 更新完成", bInfo.bundle_name);
                        UpdateUIDownload(totalSize, downloadedSize);
                    }
else                    {
                        Debug.LogErrorFormat("{0} 下载出错: {1}, {2}", bInfo.bundle_name, request.State, request.Response.IsSuccess);
                        callback?.Invoke(false);
                        callback = null;
                        hasError = true;
break;
                    }
yieldreturnnull;
                    BestHTTP.PlatformSupport.Memory.BufferPool.Release(request.Response.Data);
                }
else                {
                    Debug.LogFormat("!!!!!!!!!!! 本地已存在需要更新的 {0}，跳过下载", bInfo.bundle_name);
                    downloadedSize += bInfo.size;
                    UpdateUIDownload(totalSize, downloadedSize);
                }
            }

if (!hasError)
            {
                Debug.LogFormat("写入远程 Version 文件");
// 最后写入Version文件string versionText = Newtonsoft.Json.JsonConvert.SerializeObject(this.updateInfo.remoteVersionInfo);
                System.IO.File.WriteAllText(VERSION_FILE_PATH, versionText);
yieldreturnnull;

// 重新加载一遍本地文件this.currVersionInfo = LoadVersionInfo(VERSION_FILE_PATH);
                UpdateUIState("更新完成");
            }
        }
else        {
            Debug.LogFormat("无需要更新，前置数据不足: remoteVersionInfo is Null: {0}, updateInfo is Null: {1}", this.remoteVersionInfo == null, this.updateInfo == null);
        }
        callback?.Invoke(true);
    }

privateclassUpdateInfo    {
public MoeVersionInfo remoteVersionInfo;
public List<VersionBundleInfo> updateBundleList;
    }

private voidUpdateUIState(string msg)    {
        versionStateParam.state = msg;
        MoeEventManager.Inst.SendEvent(EventID.Event_OnVersionState, versionStateParam);
    }

private voidUpdateUIDownload(long total, long downloaded)    {
        updateProgressParam.totalUpdateSize = total;
        updateProgressParam.nowUpdatedSize = downloaded;
        MoeEventManager.Inst.SendEvent(EventID.Event_OnUpdateProgress, updateProgressParam);
    }

private voidOnMsgBox(string msg, string btnText, System.Action callback)    {
        msgBoxParam.msg = msg;
        msgBoxParam.btnText = btnText;
        msgBoxParam.callback = callback;
        MoeEventManager.Inst.SendEvent(EventID.Event_OnVersionMsgBox, msgBoxParam);
    }
}

MoeReleaseAssetBundleManager.cs 运行时资源管理器文章来源地址https://www.toymoban.com/news/detail-702052.html

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System.IO;

publicclassMoeReleaseAssetBundleManager : IMoeResAgent{
conststring INDEX_FILE = "index";
privateDictionary<int, Object> _resources = new Dictionary<int, Object>();
privateDictionary<int, AssetBundle> _bundles = new Dictionary<int, AssetBundle>();
privateDictionary<int, string> _bundles_index = new Dictionary<int, string>();

private AssetBundleManifest _manifest = null;

public voidInit()    {
        InitAndLoadManifestFile();
        InitAndLoadIndexFile();
    }

private voidInitAndLoadIndexFile()    {
        _bundles_index.Clear();
        AssetBundle indexBundle = LoadBundleSync(INDEX_FILE);
        TextAsset ta = indexBundle.LoadAsset<TextAsset>(INDEX_FILE);
if (ta == null)
        {
            Debug.LogErrorFormat("Index 文件加载失败！");
return;
        }

string[] lines = ta.text.Split('\n');
char[] trim = newchar[] { '\r', '\n' };

if (lines != null && lines.Length > 0)
        {
for (int i = 0; i < lines.Length; ++i)
            {
string line = lines[i].Trim(trim);
if (string.IsNullOrEmpty(line))
                {
continue;
                }

string[] pair = line.Split(':');
if (pair.Length != 2)
                {
                    Debug.LogErrorFormat("Index 行数据有问题: {0}", line);
continue;
                }

int hash = pair[0].GetHashCode();
if (_bundles_index.ContainsKey(hash))
                {
                    Debug.LogErrorFormat("Index 文件中存在相同的路径: {0}", pair[0]);
                }
else                {
                    _bundles_index.Add(hash, pair[1]);
                }
            }
        }

if (_bundles_index.Count != 0)
        {
            Debug.LogFormat("Bundle Index 初始化完成");
        }
else        {
            Debug.LogErrorFormat("Index 文件数据为空");
        }

        indexBundle.Unload(true);
        indexBundle = null;
    }

private voidInitAndLoadManifestFile()    {
        AssetBundle manifestBundle = LoadBundleSync("Bundles");
        _manifest = manifestBundle.LoadAsset<AssetBundleManifest>("AssetBundleManifest");
        manifestBundle.Unload(false);
        manifestBundle = null;
    }

public T LoadAsset<T>(string path) where T : UnityEngine.Object    {
        UnityEngine.Object obj = Load(path);
if (obj != null)
        {
return obj as T;
        }

returnnull;
    }

public byte[] LoadLuaCode(string path)    {
string assetPath = string.Format("LuaScripts/{0}", path);
        TextAsset ta = LoadAsset<TextAsset>(assetPath);
if (ta != null)
        {
return ta.bytes;
        }
returnnull;
    }



private UnityEngine.Object Load(string assetPath)    {
if (string.IsNullOrEmpty(assetPath))
        {
returnnull;
        }

int pathHash = assetPath.GetHashCode();
        Object obj = null;
if (_resources.TryGetValue(pathHash, out obj))
        {
if (obj == null)
            {
                _resources.Remove(pathHash);
            }
else            {
return obj;
            }
        }

        AssetLoadInfo loadInfo = GetAssetLoadInfo(assetPath);
// 加载依赖Bundle
for (int i = 0; i < loadInfo.dependencies.Length; ++i)
        {
if (LoadBundleSync(loadInfo.dependencies[i]) == null)
            {
                Debug.LogErrorFormat("加载依赖Bundle出错，资源 {0}， 主Bundle：{1}， 依赖：{2}", assetPath, loadInfo.mainBundle, loadInfo.dependencies[i]);
returnnull;
            }
        }

        AssetBundle mainBundle = LoadBundleSync(loadInfo.mainBundle);
if (mainBundle == null)
        {
            Debug.LogErrorFormat("加载主Bundle出错，资源：{0}，主Bundle：{1}", assetPath, loadInfo.mainBundle);
returnnull;
        }

        obj = mainBundle.LoadAsset(assetPath);

if (obj == null)
        {
            Debug.LogErrorFormat("从Bundle加载资源失败，资源：{0}，主Bundle：{1}", assetPath, loadInfo.mainBundle);
returnnull;
        }

        _resources.Add(pathHash, obj);
return obj;
    }

private AssetBundle LoadBundleSync(string bundleName)    {
int bundleHash = bundleName.GetHashCode();
        AssetBundle bundle = null;

if (!_bundles.TryGetValue(bundleHash, out bundle))
        {
#if UNITY_EDITORstring rootPath = Application.dataPath + "/../streaming";
#elsestring rootPath = Application.persistentDataPath;
#endifstring bundleLoadPath = System.IO.Path.Combine(rootPath, string.Format("Bundles/{0}", bundleName));
            Debug.LogFormat(">>>> 加载Bundle: {0}", bundleLoadPath);

using (var fileStream = new AssetBundleStream(bundleLoadPath, FileMode.Open, FileAccess.Read, FileShare.None, 1024 * 4, false))
            {
                bundle = AssetBundle.LoadFromStream(fileStream);
            }

// bundle = AssetBundle.LoadFromFile(bundleLoadPath);
if (bundle != null)
            {
                _bundles.Add(bundleHash, bundle);
            }
else            {
                Debug.LogErrorFormat("Bundle 加载失败 {0}, LoadPath: {1}", bundleName, bundleLoadPath);
            }
        }
else        {
// Debug.LogFormat("Bundle {0} 已加载，直接返回", bundleName);        }

return bundle;
    }

private stringGetAssetOfBundleFileName(string assetPath)    {
int assetHash = assetPath.GetHashCode();
string bundleName;
if (_bundles_index.TryGetValue(assetHash, out bundleName))
        {
return bundleName;
        }

returnstring.Empty;
    }

private AssetLoadInfo GetAssetLoadInfo(string assetPath)    {
        AssetLoadInfo loadInfo = new AssetLoadInfo();
        loadInfo.assetPath = assetPath;
        loadInfo.mainBundle = GetAssetOfBundleFileName(assetPath);
        loadInfo.dependencies = _manifest.GetAllDependencies(loadInfo.mainBundle);
return loadInfo;
    }


privateclassAssetLoadInfo    {
publicstring assetPath;
publicstring mainBundle;
publicstring[] dependencies;
    }
}