Unity Asset Bundle - Sizuha/devdog GitHub Wiki

using UnityEngine;
using UnityEditor;
using System.Collections;
using System.IO;

public class MakeAssetBundle : MonoBehaviour {

  // 메뉴가 들어갈 위치.
  [MenuItem("Assets/Make: Asset Bundles/Generate All from file (Android)")]
  static void GenerateAll_Android()  {
    ExportAll(BuildTarget.Android); 
  }  

  [MenuItem("Assets/Make: Asset Bundles/Generate All from file (iOS)")]
  static void GenerateAll_IOS()  {
    ExportAll(BuildTarget.iPhone); 
  }  

  [MenuItem("Assets/Make: Asset Bundles/Generate All from file (Windows)")]
  static void GenerateAll_Win()  {
    ExportAll(BuildTarget.StandaloneWindows); 
  }  
  
  [MenuItem("Assets/Make: Asset Bundles/Generate All from file (OS X)")]
  static void GenerateAll_Mac()  {
    ExportAll(BuildTarget.StandaloneOSXIntel); 
  }  

  static void ExportAll(BuildTarget target) {
    // {ResourcePath}/patch_list.txt 파일에서 어셋 번들을 만들 리스트를 가져온다.
    TextAsset filelist_obj = Resources.Load("patch_list", typeof(TextAsset)) as TextAsset;    
    string[] filelist = filelist_obj.text.Split('\n');

    foreach (string original_path in filelist) {  
      string path = original_path.Trim();

      // # is remarks
      if (path.Length <= 0 || path.StartsWith("#"))
        continue;    

      string filename = Path.GetFileNameWithoutExtension(path);
      
      // 번들 파일이 생성될 경로.
      // {ProjectPath}/patch/{BuildTargetName}
      Directory.CreateDirectory(@"patch/" + target.ToString() + "/");
      string output_path = string.Format("patch/{0}/{1}.unity3d", target.ToString(), filename);    
      
      string included_path = "Assets/" + path;    
      UnityEngine.Object obj = Resources.LoadAssetAtPath(included_path, typeof(UnityEngine.Object));    
      if (obj == null)    
      {    
        Debug.LogError("Cannot find the resource. " + included_path);    
        continue;    
      }    
      
      // Asset Bundle 생성
      BuildPipeline.BuildAssetBundle(obj, null, output_path,    
                                     BuildAssetBundleOptions.CollectDependencies | BuildAssetBundleOptions.CompleteAssets,    
                                     target);    
      
      Debug.Log("completed... : " + included_path);
    }
  }
}

using UnityEngine;
using UnityEditor;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Xml;

public class MakeAssetBundle : MonoBehaviour {

  // 메뉴가 들어갈 위치입니다. Assets메뉴 하위.
  [MenuItem("Assets/Make: Asset Bundles/Generate All from file (Android)")]
  static void GenerateAll_Android()  {
    ExportAll(BuildTarget.Android); 
  }  

  [MenuItem("Assets/Make: Asset Bundles/Generate All from file (iOS)")]
  static void GenerateAll_IOS()  {
    ExportAll(BuildTarget.iPhone); 
  }  

  [MenuItem("Assets/Make: Asset Bundles/Generate All from file (Windows)")]
  static void GenerateAll_Win()  {
    ExportAll(BuildTarget.StandaloneWindows); 
  }  
  
  [MenuItem("Assets/Make: Asset Bundles/Generate All from file (OS X)")]
  static void GenerateAll_Mac()  {
    ExportAll(BuildTarget.StandaloneOSXIntel); 
  }

  private static void WriteVersionInfo(StreamWriter wr, string file_name, int version, BuildTarget target) {
    string target_text = "";

    switch (target) {
    case BuildTarget.iPhone:
      target_text = "ios";
      break;
    
    case BuildTarget.StandaloneOSXIntel:
      target_text = "osx";
      break;

    case BuildTarget.StandaloneWindows:
      target_text = "win";
      break;

    case BuildTarget.Android: 
      target_text = "android";
      break;
    }

    wr.WriteLine(file_name + "," + version + "," + target_text);
  }

  static void ExportByNode(BuildTarget target, string output_path, XmlNode node, StreamWriter verWriter) {
    string groupName = node.Attributes["name"] != null ? node.Attributes["name"].Value : "";
    bool group_mode = !string.IsNullOrEmpty(groupName);

    string workpath = node.Attributes["path"] != null ? node.Attributes["path"].Value : "";

    string ver_str = node.Attributes["ver"] != null ? node.Attributes["ver"].Value : "0";
    int version = string.IsNullOrEmpty(ver_str) ? 0 : int.Parse(ver_str);

    List<string> files = new List<string>();
    string[] filelist_text = node.InnerText.Split('\n');

    foreach (string original_path in filelist_text) {
      string path = original_path.Trim();
      if (string.IsNullOrEmpty(path)) continue;

      files.Add("Assets/" + workpath + "/" + path);
    }

    List<UnityEngine.Object> obj_list = new List<UnityEngine.Object>();

    foreach (string src in files) {
      // 리스트에 기입된 경로에서 오브젝트를 로드합니다.  
      UnityEngine.Object obj = Resources.LoadAssetAtPath(src, typeof(UnityEngine.Object));
      if (obj == null) {
        Debug.LogError("Cannot find the resource. " + src);    
        continue;    
      }

      if (group_mode) {
        obj_list.Add(obj);
      }
      else {
        string file_name = Path.GetFileNameWithoutExtension(src) + ".unity3d";
        string out_name = output_path + file_name ;

        BuildPipeline.BuildAssetBundle(
          obj, new UnityEngine.Object[] { obj }, out_name,
          BuildAssetBundleOptions.CollectDependencies | BuildAssetBundleOptions.CompleteAssets,
          target);

        Debug.Log("completed... : " + src); 
        WriteVersionInfo(verWriter, file_name, version, target);
      }
    }

    if (group_mode && obj_list.Count > 0) {
      string file_name = groupName + ".unity3d";
      string out_name = output_path + file_name;
      
      BuildPipeline.BuildAssetBundle(
        obj_list[0], obj_list.ToArray(), out_name,
        BuildAssetBundleOptions.CollectDependencies | BuildAssetBundleOptions.CompleteAssets,
        target);

      Debug.Log("completed... : " + out_name);
      WriteVersionInfo(verWriter, file_name, version, target);
    }

    obj_list.Clear();
  }

  static void ExportAll(BuildTarget target) {
    XmlTextReader reader = new XmlTextReader("patch_list.xml");

    XmlDocument xml = new XmlDocument ();
    xml.Load(reader);
    XmlElement xmlRoot = xml.DocumentElement;

    string output_path = xmlRoot.Attributes["outpath"].Value + "/" + target.ToString() + "/";
    Directory.CreateDirectory(output_path);

    StreamWriter verFile = File.CreateText(output_path + "version.txt");

    // Root
    foreach (XmlNode node in xmlRoot.ChildNodes) {
      if (node.Name.Equals("AssetBundle")) {
        ExportByNode(target, output_path, node, verFile);
      }
    }

    reader.Close();
    verFile.Close();
  }
}

using System;
using UnityEngine;
using System.Collections; class NonCachingLoadExample : MonoBehaviour {
   public string BundleURL;
   public string AssetName;
   IEnumerator Start() {
     // URLからファイルをダウンロード。キャッシュにセーブされません。
     using (WWW www = new WWW(BundleURL)) {
       yield return www;
       if (www.error != null)
         throw new Exception("WWWダウンロードにエラーがありました:" + www.error);
       AssetBundle bundle = www.assetBundle;
       if (AssetName == "")
         Instantiate(bundle.mainAsset);
       else
         Instantiate(bundle.Load(AssetName));
                   // メモリ節約のため圧縮されたアセットバンドルのコンテンツをアンロード
                   bundle.Unload(false);

     } // memory is freed from the web stream (www.Dispose() gets called implicitly)
   }
}

using System;
using UnityEngine;
using System.Collections;

public class CachingLoadExample : MonoBehaviour {
  public string BundleURL;
  public string AssetName;
  public int version;

  void Start() {
    StartCoroutine (DownloadAndCache());
  }

  IEnumerator DownloadAndCache (){
    // キャッシュシステムの準備が完了するのを待ちます
    while (!Caching.ready)
      yield return null;

    // 同じバージョンが存在する場合はアセットバンドルをキャッシュからロードするか、またはダウンロードしてキャッシュに格納します。
    using(WWW www = WWW.LoadFromCacheOrDownload (BundleURL, version)){
      yield return www;
      if (www.error != null)
        throw new Exception("WWWダウンロードにエラーがありました:" + www.error);
      AssetBundle bundle = www.assetBundle;
      if (AssetName == "")
        Instantiate(bundle.mainAsset);
      else
        Instantiate(bundle.Load(AssetName));
                  // メモリ節約のため圧縮されたアセットバンドルのコンテンツをアンロード
                  bundle.Unload(false);

    } // memory is freed from the web stream (www.Dispose() gets called implicitly)
  }
}

using UnityEngine;

// 注意: このサンプルはエラーチェックを行いません。詳細についてはDownloadingAssetBundlesのサンプルを参照下さい。
IEnumerator Start () {
  // 特定URLからダウンロードを開始
  WWW www = WWW.LoadFromCacheOrDownload (url, 1);

  // ダウンロード完了を待機
  yield return www;

  // アセットバンドルをロードし取得
  AssetBundle bundle = www.assetBundle;

  // オブジェクトを非同期ロード
  AssetBundleRequest request = bundle.LoadAsync ("myObject", typeof(GameObject));

  // 完了を待機
  yield return request;

  // ロードされたオブジェクトの参照を取得
  GameObject obj = request.asset as GameObject;

        // メモリ節約のため圧縮されたアセットバンドルのコンテンツをアンロード
        bundle.Unload(false);

        // Frees the memory from the web stream
        www.Dispose();
}

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class AssetBundleManager : MonoBehaviour {

  private static AssetBundleManager _instance;

  public static AssetBundleManager Instance {
    get {
      if (!_instance) {
        _instance = GameObject.FindObjectOfType<AssetBundleManager>();

        if (!_instance) {
          GameObject container = new GameObject();
          container.name = "AssetBundleManager";
          _instance = container.AddComponent<AssetBundleManager>();
          DontDestroyOnLoad(_instance);
        }
      }

      return _instance;
    }
  }

  public delegate void OnObjLoad(UnityEngine.Object loaded_obj);
  public delegate void OnLoadFinish();
  public delegate void OnBundleLoad(AssetBundle bundle);


  private UnityEngine.Object lastObj;
  public Dictionary<string, UnityEngine.Object> objDic = new Dictionary<string, UnityEngine.Object>();

  public  T GetLastObj<T>() where T : UnityEngine.Object {
    return (this.lastObj == null) ? null : this.lastObj as T;
  }

  public void ClearAll(bool destroy = true) {
    if (destroy) {
      foreach (UnityEngine.Object o in this.objDic.Values) Destroy(o);

      if (this.lastObj !=  null) {
        Destroy(this.lastObj);
        this.lastObj = null;
      }
    }

    this.objDic.Clear();
  }

  public IEnumerator LoadBundle(string url, int version, OnBundleLoad onLoad) {
    // キャッシュシステムの準備が完了するのを待ちます.
    while (!Caching.ready) yield return null;
    
    // 特定URLからダウンロードを開始.
    using (WWW www = WWW.LoadFromCacheOrDownload (url, version)) {
      // ダウンロード完了を待機.
      yield return www;
      
      // アセットバンドルをロードし取得.
      AssetBundle bundle = www.assetBundle;
      onLoad(bundle);

      // メモリ節約のため圧縮されたアセットバンドルのコンテンツをアンロード.
      bundle.Unload(false);
    } // Frees the memory from the web stream.
  }

  public IEnumerator LoadObjects<T>(string url, int version, OnObjLoad onLoad, OnLoadFinish onFinished, params string[] objNames) 
    where T : UnityEngine.Object 
  {
    // キャッシュシステムの準備が完了するのを待ちます.
    while (!Caching.ready) yield return null;

    UnityEngine.Object last_obj = null;

    // 特定URLからダウンロードを開始.
    using (WWW www = WWW.LoadFromCacheOrDownload (url, version)) {
      // ダウンロード完了を待機.
      yield return www;
    
      // アセットバンドルをロードし取得.
      AssetBundle bundle = www.assetBundle;

      if (objNames.Length < 1) {
        last_obj = Instantiate(bundle.mainAsset);
        if (onLoad != null) onLoad(last_obj);
      }
      else {
        foreach (string obj_name in objNames) {
          // オブジェクトを非同期ロード.
          AssetBundleRequest request = bundle.LoadAsync(obj_name, typeof(T));
        
          // 完了を待機.
          yield return request;
        
          objDic[obj_name] = last_obj = Instantiate(request.asset);
          if (onLoad != null) onLoad(last_obj);
        }
      }

      // メモリ節約のため圧縮されたアセットバンドルのコンテンツをアンロード.
      bundle.Unload(false);
    } // Frees the memory from the web stream.

    if (onFinished != null) {
      onFinished();
    }

    this.lastObj = last_obj;
  }

}