【Unity3d基础】Unity3d中自动生成asset bundle name_unity 设置assetbundlw名字

引言：

在unity3d的实际项目开发中，由于资源的增删改频繁，手动设置asset bundle name是一项繁琐且容易出错的工作，所以衍生出了开发自动化工具的需求。

工作原理：

以文件夹为目标，设置asset bundle name，在目标文件夹内的文件都会打进同一个asset bundle。

实现原理：

通过遍历Asset路径下的所有文件夹，收集所有的子文件夹列表，然后顺序设置asset bundle name。命名规格是将路径中的"\"替换为"_"。其中对文件夹的操作用到System.IO下面的接口。

源代码：

using UnityEngine;
using System.Collections;
using UnityEditor;
using System.Collections.Generic;
using System.IO;
 
public class AutoGenerateAssetBundleName
{
    /// <summary>
    /// 黑名单
    /// </summary>
    static public string[] skip_dirs_all = { "testBlackList" };
 
    [MenuItem("Asset Bundle/Auto generate asset bundle name", false, 1)]
    public static void GenerateAssetBundleName()
    {
        string dataPath = Application.dataPath;
 
        string root_path = "";
        string sub_dir = "";
        int position = dataPath.LastIndexOf(@"/");
        if (position != -1)
        {
            root_path = dataPath.Substring(0, position + 1);
            sub_dir = dataPath.Substring(position + 1);
        }
 
        ClearAssetBundleName(root_path, sub_dir);
        Debug.Log("Begin GenerateAssetBundleName...");
 
        List<string> OutPathList = new List<string>();
        List<string> IncludeOutPathList = new List<string>();
        OutPathList = GetFilterDirectories(@root_path, @sub_dir);
        
        foreach(string AssetBundleName in OutPathList)
        {
            AssetImporter importer = AssetImporter.GetAtPath(AssetBundleName);
            if (importer != null)
            {
                importer.assetBundleName = AssetBundleName.Replace('/', '_');
                importer.assetBundleVariant = "";
            }
        }
        AssetDatabase.Refresh();
 
        Debug.Log("End GenerateAssetBundleName... Total asset bundle count: " + OutPathList.Count);
    }
 
    static List<string> GetFilterDirectories(string root_path, string sub_dir, bool bNeedSkip = true)
    {
        //需要过滤的文件夹
        List<string> skip_dirs = new List<string>(skip_dirs_all);
        string sub_folder_name = sub_dir;
        int position = sub_dir.LastIndexOf(@"/");
        if (position != -1)
            sub_folder_name = sub_dir.Substring(position + 1);
 
        if (bNeedSkip)
        {
            bool bSkipit = false;
            foreach(string skip_dir in skip_dirs)
            {
                if (string.Compare(skip_dir, sub_folder_name, true) == 0)
                {
                    bSkipit = true;
                    break;
                }
            }
            if (bSkipit)
            {
                return new List<string>();
            }
        }
 
        string[] dirs = Directory.GetDirectories(root_path + sub_dir, "*", SearchOption.TopDirectoryOnly);
        // 提取文件夹名
        string[] folder_names = new string[dirs.Length];
        for (int i = 0; i < dirs.Length; ++i)
        {
            int pos = dirs[i].LastIndexOf(@"\");
            if (pos != -1)
                folder_names[i] = dirs[i].Substring(pos + 1);
        }
 
        List<string> filter_dirs = new List<string>();
        if (dirs.Length == 0)
        {
            //没有子目录
            //如果sub_folder_name不在skip_dirs内，则设置assetbundlename
            bool bFindit = false;
            foreach(string skip_dir in skip_dirs)
            {
                if (string.Compare(skip_dir, sub_folder_name, true) == 0)
                {
                    bFindit = true;
                    break;
                }
            }
            if (!bFindit)
            {
                Debug.Log("collect valid asset bundle name: " + sub_dir);
                filter_dirs.Add(sub_dir);
            }
            return filter_dirs;
 
        }
        foreach (string folder_name in folder_names)
        {
            List<string> sub_filter_dirs = GetFilterDirectories(root_path, sub_dir + "/" + folder_name);
            filter_dirs.AddRange(sub_filter_dirs);
        }
 
        return filter_dirs;
    }
 
    static void GetAllDirectories(string root_path, string sub_dir, ref List<string> outPathList)
    {
        string[] dirs = Directory.GetDirectories(root_path + sub_dir, "*", SearchOption.TopDirectoryOnly);
        outPathList.Add(sub_dir);
        if (dirs.Length > 0)
        {
            // 提取文件夹名
            string[] folder_names = new string[dirs.Length];
            for(int i = 0; i < dirs.Length; ++i)
            {
                int pos = dirs[i].LastIndexOf(@"\");
                if (pos != -1)
                    folder_names[i] = dirs[i].Substring(pos + 1);
            }
 
            foreach(string folder_name in folder_names)
            {
                GetAllDirectories(root_path, sub_dir + "/" + folder_name, ref outPathList);
            }
        }
    }
 
    static void ClearAssetBundleName(string root_path, string sub_dir)
    {
        List<string> OutPathList = new List<string>();
        GetAllDirectories(@root_path, @sub_dir, ref OutPathList);
        foreach(string folder in OutPathList)
        {
            AssetImporter importer = AssetImporter.GetAtPath(folder);
            if (importer != null)
            {
                importer.assetBundleName = "";
            }
        }
        AssetDatabase.RemoveUnusedAssetBundleNames();
        AssetDatabase.Refresh();
    }
}

运行结果：

运行的log输出

文件夹的asset bundle name: