Unity AssetBundle设置名称优化
发表于2018-04-03
在大部分的 Unity 分析打包 AssetBundle 过程中，是采用对资源设置 AssetBundle 名称标签的方式来进行打包，类似如下：
public static void SetBundleName(string assetPath, string bundleName)
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var importer = AssetImporter.GetAtPath(assetPath);
if (importer && importer.assetBundleName != bundleName)
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importer.assetBundleName = bundleName;
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private static void BuildAssetBundlesInter(string outputPath, AssetBundleBuildOptions options)
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AssetBundleManifest manifest = BuildPipeline.BuildAssetBundles(outputPath,
BuildAssetBundleOptions.UncompressedAssetBundle, GetBuildTarget());
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每设置一个资源的 AssetBundle 名称，都会导致 Unity 写入其 .meta 文件，这样在分析的过程耗费不少时间。而且在打包完毕，又得重新设置所有资源的 AssetBundle 名称为空，否则仓库会提示有文件变化。基于此，本篇文章就和大家介绍下对AssetBundle的名称优化。
思路
修改流程，改成传入 AssetBundleBuild[] 的方式进行打包，这样就无需设置资源的 AssetBundle 名称。但是不能简单的把结果保存为 AssetBundleBuild[] 数组对象，因为打包工具支持当次不再分析资源，直接使用上一次的分析结果。所以要把 AssetBundleBuild[] 结果存为临时文件，方便下次使用，正常来说，这个临时文件一般只对当天的资源有效即可，当更新了资源，肯定得重新分析资源，不能再使用上次的结果。所以，只需要把这临时文件放在 Temp 目录下即可。
解决
创建一个独立类，来管理分析的 AssetBundle 构建信息：
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.Serialization.Formatters.Binary;
using UnityEditor;
/// <summary>
/// AssetBundle 分析映射
/// </summary>
public static class AssetBundleBuildMap
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private static AssetBundleMap assetBundleMap;
public static void Clear()
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if (assetBundleMap != null)
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assetBundleMap = null;
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/// <summary>
/// 普通资源设置 AssetBundle 名称接口
/// </summary>
/// <param name="assetPath"></param>
/// <param name="assetBundleName"></param>
public static void SetAssetPathAssetBundleName(string assetPath, string assetBundleName)
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if (assetBundleMap == null)
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assetBundleMap = new AssetBundleMap();
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assetBundleMap.AddMap(assetPath, assetBundleName);
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public static bool IsAssetPathHasAssetBundleName(string assetPath)
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if (assetBundleMap == null)
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return false;
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return assetBundleMap.assetPathSet.Contains(assetPath);
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public static List<string> GetAllAssetBundleNames()
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if (assetBundleMap == null)
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return null;
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List<string> allAssetBundleNames = assetBundleMap.assetBundleDict.Keys.ToList();
allAssetBundleNames.Sort(EditorUtility.NaturalCompare);
return allAssetBundleNames;
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public static List<string> GetAssetPathsFromAssetBundle(string assetBundleName)
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if (assetBundleMap == null)
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return null;
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List<string> assetPaths;
if (assetBundleMap.assetBundleDict.TryGetValue(assetBundleName, out assetPaths))
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assetPaths.Sort(EditorUtility.NaturalCompare);
return assetPaths;
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return null;
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/// <summary>
/// 最终需要进行打包的资产构建列表
/// </summary>
/// <returns></returns>
public static AssetBundleBuild[] GetAssetBundleBuilds()
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List<AssetBundleBuild> assetBundleBuilds = new List<AssetBundleBuild>();
string tempPath = "Temp/AssetBundleBuildAnalyze";
if (assetBundleMap == null)
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assetBundleMap = AssetBundleMap.MakeByLoad(tempPath);
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else
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assetBundleMap.Save(tempPath);
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assetBundleBuilds.AddRange(assetBundleMap.GetBuilds());
return assetBundleBuilds.ToArray();
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private class AssetBundleMap
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public readonly HashSet<string> assetPathSet = new HashSet<string>();
public Dictionary<string, List<string>> assetBundleDict = new Dictionary<string, List<string>>();
public void AddMap(string assetPath, string assetBundleName)
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if (string.IsNullOrEmpty(assetPath) || string.IsNullOrEmpty(assetBundleName))
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return;
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if (assetPathSet.Contains(assetPath))
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return;
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assetPathSet.Add(assetPath);
List<string> assetPaths;
if (assetBundleDict.TryGetValue(assetBundleName, out assetPaths))
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assetPaths.Add(assetPath);
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else
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assetPaths = new List<string> ｛ assetPath ｝;
assetBundleDict.Add(assetBundleName, assetPaths);
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public List<AssetBundleBuild> GetBuilds()
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List<AssetBundleBuild> assetBundleBuilds = new List<AssetBundleBuild>();
foreach (var kv in assetBundleDict)
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assetBundleBuilds.Add(new AssetBundleBuild() ｛ assetBundleName = kv.Key, assetNames = kv.Value.ToArray() ｝);
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return assetBundleBuilds;
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public void Save(string tempPath)
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using (MemoryStream stream = new MemoryStream())
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new BinaryFormatter().Serialize(stream, assetBundleDict);
File.WriteAllBytes(tempPath, stream.ToArray());
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public static AssetBundleMap MakeByLoad(string tempPath)
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AssetBundleMap map = new AssetBundleMap();
if (File.Exists(tempPath))
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byte[] bytes = File.ReadAllBytes(tempPath);
using (MemoryStream stream = new MemoryStream(bytes))
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map.assetBundleDict = new BinaryFormatter().Deserialize(stream) as Dictionary<string, List<string>>;
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return map;
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最终调用的方式如下：
private static void BuildAssetBundlesInter(string outputPath, AssetBundleBuildOptions options)
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AssetBundleBuild[] assetBundleBuilds = AssetBundleBuildMap.GetAssetBundleBuilds();
AssetBundleManifest manifest = BuildPipeline.BuildAssetBundles(outputPath, assetBundleBuilds,
BuildAssetBundleOptions.UncompressedAssetBundle, GetBuildTarget());
AssetBundleBuildMap.Clear();
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来自：https://blog.csdn.net/akof1314/article/details/77751512