AssetBundle resource management

One 、 Manually name and package

1. Write plugins , stay Asset Create in folder Editor Folder , Create a plug-in script inside

2. The name , Name the file to be packaged AssetBundle name

3. pack , Be careful to add MenuItem characteristic , And the platform name , because AssetBundle No cross platform

using System.IO;
using UnityEditor;// Introduce the namespace of the editor 
using UnityEngine;

public class BuildAB : Editor // Inherit the editor class 
{
   [MenuItem("MyMenu/BuildAB-Windows")]
   public static void BuildAssetBundle()
   {
      BuildPipeline.BuildAssetBundles(Application.dataPath + "/AB",// Package output path 
         BuildAssetBundleOptions.ChunkBasedCompression,// Compression mode [LZ4]
         //BuildAssetBundleOptions.None   Default mode [LZMA], High compression ratio , Bao Xiao , Loading is slow , It needs to be decompressed as a whole 
         //BuildAssetBundleOptions.UncompressedAssetBundle [Uncompressed]  Uncompressed , Bao Da , Load fast 
         //BuildAssetBundleOptions.ChunkBasedCompression [LZ4] Medium compression ratio , You can load a specified resource without loading all 
         BuildTarget.StandaloneWindows64);
   }
}

Generated files ：

manifest It's an instruction document , contain CRC Check code , Document version number , Dependencies among documents, etc . The contents are as follows ：

  

Two 、 Automatic packing

using System.IO;
using UnityEditor;// Introduce the namespace of the editor 
using UnityEngine;

public class BuildAB : Editor // Inherit the editor class 
{
   private static string needBuildAssetsPath = Application.dataPath + "/needBulid";
   private static string assetBundleOutPutPath_win = Application.dataPath + "/AB";
   [MenuItem("MyMenu/BuildAB-Windows")]
   public static void BuildAssetBundle()
   {
      // Empty the name 
      ClearAssetBundleNames();
      // The name 
      SetAssetBundleNames();
      // pack 
      BuildPipeline.BuildAssetBundles(assetBundleOutPutPath_win,// Package output path 
         BuildAssetBundleOptions.ChunkBasedCompression,// Compression mode [LZ4]
         //BuildAssetBundleOptions.None   Default mode [LZMA], High compression ratio , Bao Xiao , Loading is slow , It needs to be decompressed as a whole 
         //BuildAssetBundleOptions.UncompressedAssetBundle [Uncompressed]  Uncompressed , Bao Da , Load fast 
         //BuildAssetBundleOptions.ChunkBasedCompression [LZ4] Medium compression ratio , You can load a specified resource without loading all 
         BuildTarget.StandaloneWindows64);
      // Empty the name 
      ClearAssetBundleNames();
      // Refresh 
      AssetDatabase.Refresh();
   }

   /// <summary>
   ///  Empty all Bundle name 
   /// </summary>
   private static void ClearAssetBundleNames()
   {
     var allName =  AssetDatabase.GetAllAssetBundleNames();

     for (int i = 0; i < allName.Length; i++)
     {
        AssetDatabase.RemoveAssetBundleName(allName[i], true);// Clear even when in use 
     }
   }
   private static void SetAssetBundleNames()
   {
      // You need to package the root directory of the file 
      DirectoryInfo di = new DirectoryInfo(needBuildAssetsPath);
      // Open Directory 
      OpenDirectoryAndSetName(di);
      
      // Traverse all subfolders 
      /*foreach (var item in di.EnumerateDirectories())
      {
         Debug.Log(item.FullName);
      }*/
      
      // Traverse all of meta file 
      /*foreach (var item in di.EnumerateFiles())
      {
         Debug.Log(item.FullName);
      }*/
      
      // Traverse all files and folders 
      /*foreach (var item in di.EnumerateFileSystemInfos())
      {
         Debug.Log(item.FullName);
      }*/
   }

   private static void OpenDirectoryAndSetName(DirectoryInfo dirInfo)
   {
      foreach (var item in dirInfo.EnumerateFileSystemInfos())
      {
         if (item is DirectoryInfo)
         {
            // Recursively open subfolders 
            OpenDirectoryAndSetName(item as DirectoryInfo);
         }
         else
         {
            if (item.Name.EndsWith(".meta"))
               continue;
            SetFileBundleName(item.FullName);
         }
      }
   }

   /// <summary>
   ///  Start the file Bundle name 
   /// </summary>
   /// <param name="fileFullName"></param>
   private static void SetFileBundleName(string fileFullName)
   {
      // Get relative path 
      string relativePath = "Assets" + fileFullName.Substring(Application.dataPath.Length);
      // Get the file name [ To prefix ]
      string fileName =  fileFullName.Substring(fileFullName.LastIndexOf('\\') + 1);
      // Remove suffix 
      fileName = fileName.Remove(fileName.LastIndexOf('.'));
      // Start the file Bundle name 
      // Access to resources AssetImporter object 
      AssetImporter fileImportor = AssetImporter.GetAtPath(relativePath);
      fileImportor.assetBundleName = fileName;
   }
}