转自：

将本地资源打包，然后放到资源服务器上供游戏客户端下载或更新。服务器上包含以下资源列表：

(1)游戏内容资源assetbundle

(2)资源维护列表，包含每个资源的名字(完整路径名)和对应的版本号[资源名，版本号]，如下表所示（VersionNum.xml）:

 

 

那么本地客户端的资源打包编辑器就需要完成以下工作：将资源打包、生成版本号。

我们采用通过MD5码对比的方式来对版本号进行管理，如果某资源的MD5码变更了，则将其版本号+1，否则不变。那么，可以将编辑器的具体任务划分如下：

(1)将资源打包成assetbundle，并放到指定目录下

(2)为每个assetbund生成最新MD5码，用于检查资源是否有修改

(3)比较新旧MD5码列表，产生资源变更列表，对于每个变更的资源，将其版本号+1

(4)将变更列表文件也打包成assetbundle

各个平台使用的资源包时各自独立的，打包资源代码时的选项不一样，编辑器界面如下，图2中的4个按钮每个对应上述的一步操作：

 

 

最终生成的资源目录结构如下所示：

 编辑器代码如下所示（包括菜单项和窗口）：

using UnityEditor;using UnityEngine;using System.IO;using System.Collections;using System.Collections.Generic;public class AssetBundleController : EditorWindow{    public static AssetBundleController window;    public static UnityEditor.BuildTarget buildTarget = BuildTarget.StandaloneWindows;    [MenuItem("XiYouEditor/AssetBundle/AssetBundle For Windows32", false, 1)]    public static void ExecuteWindows32()    {        if (window == null)        {            window = (AssetBundleController)GetWindow(typeof(AssetBundleController));        }        buildTarget = UnityEditor.BuildTarget.StandaloneWindows;        window.Show();    }    [MenuItem("XiYouEditor/AssetBundle/AssetBundle For IPhone", false, 2)]    public static void ExecuteIPhone()    {        if (window == null)        {            window = (AssetBundleController)GetWindow(typeof(AssetBundleController));        }        buildTarget = UnityEditor.BuildTarget.iPhone;        window.Show();    }    [MenuItem("XiYouEditor/AssetBundle/AssetBundle For Mac", false, 3)]    public static void ExecuteMac()    {        if (window == null)        {            window = (AssetBundleController)GetWindow(typeof(AssetBundleController));        }        buildTarget = UnityEditor.BuildTarget.StandaloneOSXUniversal;        window.Show();    }    [MenuItem("XiYouEditor/AssetBundle/AssetBundle For Android", false, 4)]    public static void ExecuteAndroid()    {        if (window == null)        {            window = (AssetBundleController)GetWindow(typeof(AssetBundleController));        }        buildTarget = UnityEditor.BuildTarget.Android;        window.Show();    }    [MenuItem("XiYouEditor/AssetBundle/AssetBundle For WebPlayer", false, 5)]    public static void ExecuteWebPlayer()    {        if (window == null)        {            window = (AssetBundleController)GetWindow(typeof(AssetBundleController));        }        buildTarget = UnityEditor.BuildTarget.WebPlayer;        window.Show();    }    void OnGUI()    {        if (GUI.Button(new Rect(10f, 10f, 200f, 50f), "(1)CreateAssetBundle"))        {            CreateAssetBundle.Execute(buildTarget);            EditorUtility.DisplayDialog("", "Step (1) Completed", "OK");        }        if (GUI.Button(new Rect(10f, 80f, 200f, 50f), "(2)Generate MD5"))        {            CreateMD5List.Execute(buildTarget);            EditorUtility.DisplayDialog("", "Step (2) Completed", "OK");        }        if (GUI.Button(new Rect(10f, 150f, 200f, 50f), "(3)Compare MD5"))        {            CampareMD5ToGenerateVersionNum.Execute(buildTarget);            EditorUtility.DisplayDialog("", "Step (3) Completed", "OK");        }        if (GUI.Button(new Rect(10f, 220f, 200f, 50f), "(4)Build VersionNum.xml"))        {            CreateAssetBundleForXmlVersion.Execute(buildTarget);            EditorUtility.DisplayDialog("", "Step (4) Completed", "OK");        }    }    public static string GetPlatformPath(UnityEditor.BuildTarget target)    {        string SavePath = "";        switch (target)        {            case BuildTarget.StandaloneWindows:                SavePath = "Assets/AssetBundle/Windows32/";                break;            case BuildTarget.StandaloneWindows64:                SavePath = "Assets/AssetBundle/Windows64/";                break;            case BuildTarget.iPhone:                SavePath = "Assets/AssetBundle/IOS/";                break;            case BuildTarget.StandaloneOSXUniversal:                SavePath = "Assets/AssetBundle/Mac/";                break;            case BuildTarget.Android:                SavePath = "Assets/AssetBundle/Android/";                break;            case BuildTarget.WebPlayer:                SavePath = "Assets/AssetBundle/WebPlayer/";                break;            default:                SavePath = "Assets/AssetBundle/";                break;        }        if (Directory.Exists(SavePath) == false)            Directory.CreateDirectory(SavePath);        return SavePath;    }    public static string GetPlatformName(UnityEditor.BuildTarget target)    {        string platform = "Windows32";        switch (target)        {            case BuildTarget.StandaloneWindows:                platform = "Windows32";                break;            case BuildTarget.StandaloneWindows64:                platform = "Windows64";                break;            case BuildTarget.iPhone:                platform = "IOS";                break;            case BuildTarget.StandaloneOSXUniversal:                platform = "Mac";                break;            case BuildTarget.Android:                platform = "Android";                break;            case BuildTarget.WebPlayer:                platform = "WebPlayer";                break;            default:                break;        }        return platform;    }}

 

 PS:每个操作的具体实现，见下一篇讲解...