Addressables为什么加载会很慢

解决目标

1.可以和常规方案一样，带资源版本号，对于不同的渠道，有不同的资源地址，可以回退版本。对于多个旧版本资源，都可以更新到最新的。
2.热更流程和常规流程一样，首包在包体里，也可以部分在包体里，资源从首包里加载。有热更文件进入游戏走热更预加载，也可以部分文件边玩边下，或者静默下载。
3.带热更大小查看工具，可以查看热更Bundle和资源。
4.资源颗粒度控制工具，自动刷新资源Label工具。
5.本地Host工具，由于Addressable自带的Host工具不好使，自己写了一套本地Host工具。

以上工具不修改Addressable源码，只在其基础上扩展。拿来即用。

Inspector设置

Disable Catalog Update on Startup:禁止Unity一开始自己就去下Catalog文件。

Build Remote Catalog：使用远程目录，勾选。

Player Version Override:填写一个字符串，自己根据这个生成版本。

Max Concurrent Web Requests：最大并发下载AssetBundle数量，不宜设的过大，我这个填了10多个。

首席我们打包位置都设置为远程，这样远程地址有更新后，我们能根据这个地址去下载新的热更文件。然后这个目录是自己定义的：

Addressables为什么加载会很慢_System

打开Addressables Profiles，可以设置路径：

Addressables为什么加载会很慢_Addressables_02

所有AB设为远程非静态包。Can Change Post Release

打AB包额外操作

AddressablePath是一个静态类，可以代码运行时改变这个路径。这个路径可以一开始从服务器获取。这样我们就能实现不同的渠道设置获取不同的CDN地址了。

public class AddressablePath
{
public static string ServerBuild = “ServerData”;
private static string _remoteLoadPath = “http://soccer2res.unparallel.cn:80”;
public static string RemoteLoadPath { get { return _remoteLoadPath; } set {
_remoteLoadPath = value;
}
}

这样我们的包一开始就打到ServerData目录下。但是这些资源不会一开始就放到我们包体里面去。然后我们可以自己写一个编辑器工具，打完AB包就拷贝到Streaming文件夹路径下。
同时我们要往Streaming文件夹里写一个文件，我用的是Dict数据结构，保存的是首包资源里面的每一个文件名。为什么要有这么一个文件呢？这是因为后面我们需要从Streaming文件夹里判断是否有Bundle文件，而在Android平台下是无法直接用File.Exist()判断的。

public class BuildLocalBundleData
{
public static Dictionary<string,byte> BuildLocalBundleNames = new Dictionary<string,byte>();

public static async GTask Init()
{
    var requestUrl = $"{AddressablePath.StreamingLoadPath}/{AddressablePath.GetPlatformForAssetBundles(Application.platform)}/BuildLocalBundleData.json";
    string result = "";

    //Android
    if (requestUrl.Contains("://"))
    {
        using (UnityWebRequest webequest = UnityWebRequest.Get(requestUrl))
        {
            await GAsync.Get(webequest.SendWebRequest());
            if (webequest.error != null)
            {

#if UNITY_EDITOR
Debug.Log(webequest.error + requestUrl + “：包体资源不全”);
#else
Debug.LogError(webequest.error+requestUrl+“：包体资源不全”);
#endif
}
else
{
result = webequest.downloadHandler.text;
}
}
}
//iOS
else
{
if(File.Exists(requestUrl))
result = File.ReadAllText(requestUrl);
}

    BuildLocalBundleNames = CatJson.JsonParser.ParseJson<Dictionary<string, byte>>(result);
    if (BuildLocalBundleNames.Count <= 0)
    {

#if UNITY_EDITOR
Debug.Log(requestUrl + “：BuildLocalBundleData 为空”);
#else
Debug.LogError(requestUrl+“：BuildLocalBundleData 为空”);
#endif
}
}

public static bool Index(string key)
{
    return BuildLocalBundleNames.ContainsKey(key);
}

}

运行时更改地址

在运行时候要要先转换地址，首先从包体里面加载，如果没有，说明这个文件有更新了，如果缓存下载了，我们从缓存下载里去找，再没有再从远程去下载，根据InternalIdTransformFunc这个方法实现。

private string InternalIdTransformFunc(UnityEngine.ResourceManagement.ResourceLocations.IResourceLocation location)
{
if (location.Data is AssetBundleRequestOptions ab)
{
//Debug.Log(“load primaryKey:”+location.PrimaryKey);
if (BuildLocalBundleData.Index(location.PrimaryKey))
{
var path = Path.Combine(AddressablePath.StreamingLoadPath,AddressablePath.GetPlatformForAssetBundles(Application.platform), location.PrimaryKey);
//Debug.Log($“——–exit:{path}—————”);
return path;
}
else
{
var path = Path.Combine(Caching.currentCacheForWriting.path, ab.BundleName, ab.Hash, “__data”);
if (File.Exists(path))
{
return path;
}
}
}
return location.InternalId;
}

Caching.currentCacheForWriting.path的目录在Andorid平台如下：
Android/data/包名/files/UnityCache/Shared/

Addressable更新流程

1.请求服务器获取到资源服务器地址。
2.请求资源服务器上的catalog.hash文件。如果和本地保存的有变化，则说明有热更。
本地的默认在这个目录

internal const string kCacheDataFolder = “{UnityEngine.Application.persistentDataPath}/com.unity.addressables/”;
1.
要取这个目录把下载的Catalog文件覆盖原来的。
3.有热更的情况下，去下载Catalog.json文件。覆盖本地的。
4.下载热更文件。

热更文件对比工具

可以查看两个版本，那些Bundle文件和资源文件发生了改变：

using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using AddressableToolkit;
using Codice.Client.Common;
using Platform.Editor;
using UnityEditor;
using UnityEditor.IMGUI.Controls;
using UnityEngine;
using UnityEngine.AddressableAssets.ResourceLocators;
using UnityEngine.ResourceManagement.ResourceLocations;
using UnityEngine.ResourceManagement.ResourceProviders;

public class ComFoldEditor : EditorWindow
{
GUIStyle mfileStyle;
private string basPath;
private string updatePath;
long totalSize = 0;
IOrderedEnumerable<KeyValuePair<string, long>> sortResult;
Dictionary<string, List<string>> bundle4Key = new Dictionary<string, List<string>>();
ToggleTreeview globaltree;
TreeViewItem globalRoot;

[MenuItem(“Tools/@Addressable/比较Bundle”)]
public static void OpenWindow()
{
GetWindow<ComFoldEditor>().Show();

}

private void OnEnable()
{
mfileStyle = new GUIStyle();
mfileStyle.normal.background = EditorGUIUtility.FindTexture(“Folder Icon”);
string prefBasPath = EditorPrefs.GetString(“basPath”);
if (Directory.Exists(prefBasPath))
{
basPath = prefBasPath;
}

  string prefUpdatePath = EditorPrefs.GetString("updatePath");
  if (Directory.Exists(prefUpdatePath))
  {
     updatePath = prefUpdatePath;
  }

}

public void InitBundle4Key(string catalogPath)
{
Action<string, IList<IResourceLocation>> logBunSzie = (x, y) =>
{
foreach (IResourceLocation location in y)
{
var sizeData = location.Data as AssetBundleRequestOptions;

        if (sizeData != null)
        {
           if (!bundle4Key.TryGetValue(location.PrimaryKey, out var collectList))
           {
              collectList = new List<string>();
              bundle4Key.Add(location.PrimaryKey, collectList);
           }
           if (!collectList.Contains(x))
           {
              collectList.Add(x);
           }
        }

        break;
     }
  };

  try
  {
     var conetentData = JsonUtility.FromJson<ContentCatalogData>(File.ReadAllText(catalogPath));
     var resMap = conetentData.CreateLocator();
     foreach (var item in resMap.Locations)
     {
        foreach (IResourceLocation location in item.Value.Distinct())
        {
           if (location.Data is AssetBundleRequestOptions ab)
           {
           }
           else
           {
              logBunSzie(location.PrimaryKey, location.Dependencies);
           }
        }
     }
  }
  catch (Exception e)
  {
     Debug.LogError("热更bundle目录下catalog文件不存在");
     Debug.LogError(e);
     throw;
  }

}

private void InitTreeData()
{
if (globalRoot == null)
{
int id = -1;
globalRoot = new TreeViewItem();
globalRoot.id = id;
globalRoot.depth = -1;
foreach (var l in sortResult)
{
var tItem = new TreeViewItem();
tItem.id = ++id;
tItem.depth = 0;
tItem.displayName = $“{l.Key} {GetFileSize(l.Value)}”;
globalRoot.AddChild(tItem);

          if(bundle4Key.TryGetValue(l.Key,out var address))
          {
             foreach (var VARIABLE in address)
             {
                TreeViewItem addressName = new TreeViewItem();
                addressName.displayName = VARIABLE;
                addressName.id = ++id;
                addressName.depth = 1;
                tItem.AddChild(addressName);
             }
          }
       }     
    }
  
    if (globaltree == null)
    {
       globaltree = new ToggleTreeview("", "", position.width, globalRoot, true, true, 18);
       // globaltree.CellCallBack += DrawItemCell;
       globaltree.Reload();
       globaltree.OnDoubleClicked = (item) =>
       {
          string copy = item.displayName.Split(' ')[0];
          GUIUtility.systemCopyBuffer =copy;
          GetWindow<ComFoldEditor>().ShowNotification(new GUIContent("已copy"));
       };
    }

}

private Vector3 mScrollPos;
private void OnGUI()
{
GUILayout.BeginHorizontal();
GUILayout.Label(“底包bundle目录：”,GUILayout.Width(100));
basPath = EditorGUILayout.TextField(basPath, GUILayout.Width(420));
if (GUILayout.Button(“选择”))
{
basPath = EditorUtility.OpenFolderPanel(“bundle目录”, "“, ”");
EditorPrefs.SetString(“basPath”,basPath);
}
GUILayout.EndHorizontal();

  GUILayout.BeginHorizontal();
  GUILayout.Label("热更bundle目录：",GUILayout.Width(100));
  updatePath = EditorGUILayout.TextField(updatePath, GUILayout.Width(420));
  if (GUILayout.Button("选择"))
  {
     updatePath = EditorUtility.OpenFolderPanel("bundle目录", "", "");
     EditorPrefs.SetString("updatePath",updatePath);
  }
  GUILayout.EndHorizontal();

  if (GUILayout.Button("比较"))
  {
     string catalogPath = updatePath + "/catalog_base.json";
     InitBundle4Key(catalogPath);
     CompareFold(basPath,updatePath);
     globalRoot = null;
     globaltree = null;
     InitTreeData();
  }

  if (totalSize > 0)
  {
     GUILayout.Label("热更大小："+GetFileSize(totalSize));
  }
  if (sortResult !=null && sortResult.Any())
  { 
     GUILayout.BeginArea(new Rect(10,100,this.position.width-20,this.position.height-100));
     mScrollPos = GUILayout.BeginScrollView(mScrollPos);
     if (globaltree != null)
     {
        globaltree.OnGUI(new Rect(0, 0, this.position.width - 20, this.position.height - 100));
     }
     GUILayout.EndScrollView();
     GUILayout.EndArea();
  }

}

public void CompareFold(string basePath,string updatePath)
{
if (string.IsNullOrEmpty(basePath) || string.IsNullOrEmpty(updatePath))
{
Debug.LogError(“请选择目录！”);
return;
}
List<string> baseBundleFullNames = new List<string>();
CollectAllFilesName(basePath,baseBundleFullNames);
List<string> baseBundleNames = baseBundleFullNames.ConvertAll(Path.GetFileName);
// baseBundleNames.ForEach(Debug.Log);

  List<string> updateBundleFullNames = new List<string>();
  CollectAllFilesName(updatePath,updateBundleFullNames);
  

  Dictionary<string,long> result = new Dictionary<string,long>();
  foreach (var VARIABLE in updateBundleFullNames)
  {
     //名字一样  没有发生变化
     if (baseBundleNames.Contains(Path.GetFileName(VARIABLE)))
     {
        continue;
     }
     //新增文件
     result.Add(Path.GetFileName(VARIABLE),new FileInfo(VARIABLE).Length);
  }

  
  sortResult = from d in result orderby d.Value descending select d;
  totalSize = 0;
  foreach (var l in sortResult)
  {
     totalSize += l.Value;
     Debug.Log(l.Key +"            "+ GetFileSize(l.Value));
  }
  Debug.Log("total size:"+ GetFileSize(totalSize));

}

public static void CollectAllFilesName(string path, List<string> result)
{
if (result == null)
{
Debug.LogError(“result list is null.”);
}

  foreach (var filePath in Directory.GetFiles(path))
  {
     if (filePath.EndsWith("bundle"))
     {
        result.Add(filePath);
     }
  }

  foreach (var directory in Directory.GetDirectories(path))
  {
     CollectAllFilesName(directory,result);
  }

}

public static string GetFileSize(long byteCount)
{
string size = “0 B”;
if (byteCount >= 1073741824.0)
size = $“{byteCount / 1073741824.0:##.##}” + “ GB”;
else if (byteCount >= 1048576.0)
size = $“{byteCount / 1048576.0:##.##}” + “ MB”;
else if (byteCount >= 1024.0)
size = $“{byteCount / 1024.0:##.##}” + “ KB”;
else if (byteCount > 0 && byteCount < 1024.0)
size = byteCount.ToString() + “ B”;

  return size;

}
}

对比效果如下：

Addressables为什么加载会很慢_System_03

附ToggleTreeview文件：

namespace Platform.Editor
{
public class ToggleTreeview : TreeView
{
SearchField _searchField = new SearchField();
TreeViewItem Root;
public Func<Rect, TreeViewItem, int,bool> CellCallBack;
public Action<TreeViewItem> OnDoubleClicked;
public Action<TreeViewItem> OnContextClicked;
public Action<TreeViewItem> OnClicked;
public Action<int,string> OnRename;
public Func<TreeViewItem, string, bool> SearchEvent;
public Action<IList<int>> OnSelectChange;

    internal ToggleTreeview(TreeViewState state, MultiColumnHeaderState mchs, TreeViewItem Root,float rowHeight = 18f, bool showAlternatingRowBackgrounds = true) : base(state, new MultiColumnHeader(mchs))
    {
        showBorder = false;
        this.rowHeight = rowHeight;
        this.showAlternatingRowBackgrounds = showAlternatingRowBackgrounds;
        this.Root = Root;
        this.searchString = "";
    }

    internal ToggleTreeview(string contentName, string tips, float width, TreeViewItem Root, bool showBorder, bool showAlternatingRowBackgrounds, float rowHeight = 18f) : base(new TreeViewState())
    {
        this.rowHeight = rowHeight;
        this.showBorder = showBorder;
        this.showAlternatingRowBackgrounds = showAlternatingRowBackgrounds;
        showAlternatingRowBackgrounds = true;
        this.Root = Root;
        this.searchString = "";
    }

    protected override TreeViewItem BuildRoot()
    {
        return Root;
    }

    public override void OnGUI(Rect rect)
    {
        Rect screct = rect;
        screct.height = 18f;
        searchString = _searchField.OnGUI(screct, searchString);
        screct.height = rect.height;
        screct.height -= 18f;
        screct.y += 18f;
        base.OnGUI(screct);
    }

    public void SetRowHeight(float rowHeight)
    {
        this.rowHeight = rowHeight;
    }

    protected override bool DoesItemMatchSearch(TreeViewItem item, string search)
    {
        if (SearchEvent != null)
            return SearchEvent.Invoke(item, search);
        return base.DoesItemMatchSearch(item, search);
    }

    protected override void SelectionChanged(IList<int> selectedIds)
    {
        OnSelectChange?.Invoke(selectedIds);
    }

    protected override void RowGUI(RowGUIArgs args)
    {
        if (CellCallBack != null)
        {
            if (CellCallBack.Invoke(args.rowRect, args.item, args.item.id))
            {
                return;
            }
        }
        base.RowGUI(args);
    }

    protected override void SingleClickedItem(int id)
    {
        var item = FindItem(id, Root);
        if (item != null)
        {
            if (OnClicked != null)
            {
                OnClicked(item);
            }
        }
    }

    protected override void ContextClickedItem(int id)
    {
        var item = FindItem(id, Root);
        if (item != null)
        {
            if (OnContextClicked != null)
            {
                OnContextClicked(item);
            }
        }
    }

    public TreeViewItem GetItem(int ID)
    {
        return FindItem(ID,Root);
    }

    public void SetClickItem(int id)
    {
        var selectionId = GetItem(id);
        if (selectionId != null)
            SelectionClick(selectionId, true);
    }

    protected override bool CanRename(TreeViewItem item)
    {
        return base.CanRename(item);
    }

    protected override void RenameEnded(RenameEndedArgs args)
    {
        OnRename?.Invoke(args.itemID, args.newName);        
    }

    protected override void DoubleClickedItem(int id)
    {
        var item = FindItem(id, Root);
        if (item != null)
        {
            if (OnDoubleClicked != null)
            {
                OnDoubleClicked(item);
            }
        }
    }
}

}
x
优化

1.catalog文件太大了，可以用JsonCompress压缩下。