IEnumerator _LoadDependenceInfo()
    {
        string filename = Path.Combine(AssetBundleLoader.STREAMING_ASSET_PATH, AssetBundleLoader.GetPlatformFolderForAssetBundles());
        WWW    www      = new WWW(filename);

        yield return(www);

        if (www.error != null)
        {
            Debug.LogWarning(www.error);
            www.Dispose();
            yield break;
        }

        AssetBundle         assetBundle = AssetBundle.LoadFromMemory(www.bytes);
        AssetBundleManifest manifest    = assetBundle.LoadAsset("assetbundlemanifest") as AssetBundleManifest;

        string[] assetBundleNames = manifest.GetAllAssetBundles();
        foreach (string assetBundleName in assetBundleNames)
        {
            string[] dependencies = manifest.GetAllDependencies(assetBundleName);
            s_AssetBundleDependencies.Add(assetBundleName, dependencies);
        }
        www.Dispose();
        assetBundle.Unload(true);
    }
    // load assetbuddle
    // ref++
    public static AssetBundle LoadAssetBundle(string assetBundleName)
    {
        assetBundleName  = assetBundleName.ToLower();
        assetBundleName += ".unity3d";
        if (s_AssetBundleDependencies.ContainsKey(assetBundleName))
        {
            string[] dependencies = s_AssetBundleDependencies [assetBundleName];
            foreach (string dependency in dependencies)
            {
                if (s_LoadedAssetBundles.ContainsKey(dependency))
                {
                    s_LoadedAssetBundles [dependency].refCount++;
                }
                else
                {
                    // 加载
                    //string filename = Path.Combine(Application.persistentDataPath, dependency);
                    string      filename = Path.Combine(Application.streamingAssetsPath, dependency);
                    AssetBundle ab       = AssetBundle.LoadFromFile(filename);
                    if (ab)
                    {
                        Debug.LogFormat("AssetBundle(Dependency) loaded : {0}", dependency);
                        LoadedAssetBundle loadedAssetBundle = new LoadedAssetBundle(ab);
                        s_LoadedAssetBundles.Add(dependency, loadedAssetBundle);
                        continue;
                    }
                }
            }
        }

        if (s_LoadedAssetBundles.ContainsKey(assetBundleName))
        {
            s_LoadedAssetBundles [assetBundleName].refCount++;

            return(s_LoadedAssetBundles [assetBundleName].assetBundle);
        }
        else
        {
            // 加载
            //string filename = Path.Combine(Application.persistentDataPath, assetBundleName);
            string filename = Path.Combine(Application.streamingAssetsPath, AssetBundleLoader.GetPlatformFolderForAssetBundles());
            filename = Path.Combine(filename, assetBundleName);
            AssetBundle ab = AssetBundle.LoadFromFile(filename);
            if (ab)
            {
                Debug.LogFormat("AssetBundle loaded : {0}", assetBundleName);
                LoadedAssetBundle loadedAssetBundle = new LoadedAssetBundle(ab);
                s_LoadedAssetBundles.Add(assetBundleName, loadedAssetBundle);
                return(s_LoadedAssetBundles [assetBundleName].assetBundle);
            }

            return(null);
        }
    }
 void Awake()
 {
     // download path for platforms
     s_BaseDownloadingURL += AssetBundleLoader.GetPlatformFolderForAssetBundles();
 }