IEnumerator Load_AssetBundle_Single(string ab_path, Action <AssetBundle> callback, bool loadFormPerPath, string[] dependences)
{
//Debug.Log("协程 收到 单独AB包加载子请求：" + ab_path);
//加载AB本体
//求当前ab的实际加载路径（绝对路径）
string ab_full_path;
if (loadFormPerPath)
{
ab_full_path = mPersistentDataPath + ab_path;
}
else
{
ab_full_path = mStreamingAssetsPath + ab_path;
}
//检查资源是否已加载
if (mLoadedAssetBundlePool.ContainsKey(ab_path))
{
//确认资源来源位置
if (mLoadedAssetBundlePool[ab_path].IsFromStreamingAssetsPath && loadFormPerPath)
{
//当前要加载的文件优先级高于已加载的，要把已加载的释放掉
mLoadedAssetBundlePool[ab_path].ab_asset.Unload(false);
mLoadedAssetBundlePool.Remove(ab_path);
}
else
{
//已经完美的加载出来了，不用管了
if (callback != null)
{
callback(mLoadedAssetBundlePool[ab_path].ab_asset);
yield break;
}
}
}
//是否已在加载计划中
if (mLoadPlane.ContainsKey(ab_full_path))
{
//已经有个协程在加载它了，把自己的任务登记进计划，然后不管了
mLoadPlane[ab_full_path].AddCallback(callback);
yield break;
}
else
{
//登记自己的加载计划
mLoadPlane.Add(ab_full_path, new LoadPlane(ab_path, callback));
}
#if UNITY_IOS || UNITY_STANDALONE
//检查文件是否存在
if (!File.Exists(ab_full_path))
{
XLog.PrintE("[TinaX][虚拟文件系统]加载资源错误，寻址路径：" + ab_path + " ,实际检测路径：" + ab_full_path);
//加载失败决定
mLoadPlane[ab_full_path].Fire(null);
mLoadPlane.Remove(ab_full_path);
yield break;
}
#endif
//Debug.Log(" 正式加载:" + ab_full_path);
//如果在上面没有return 掉，就正式加载
var ab_req = AssetBundle.LoadFromFileAsync(ab_full_path);
yield return(ab_req);
if (ab_req.assetBundle == null)
{
//加载失败
mLoadPlane[ab_full_path].Fire(null);
mLoadPlane.Remove(ab_full_path);
yield break;
}
//登记
var loaded_ab_data = new LoadedAssetBundle();
loaded_ab_data.Init(ab_req.assetBundle, !loadFormPerPath, ab_path, ab_full_path, dependences);
mLoadedAssetBundlePool.Add(ab_path, loaded_ab_data);
//加载计划处理
mLoadPlane[ab_full_path].Fire(ab_req.assetBundle);
mLoadPlane.Remove(ab_full_path);
yield break;
}
/// <summary>
/// 递归加载AB包及其所有依赖
/// </summary>
/// <param name="ab_path_pure">ab包相对路径</param>
/// <returns>返回路径对应的AB包</returns>
private AssetBundle Load_AssetBundle_And_Dependences_Recursion(string ab_path)
{
//检查当前AB包的加载位置
bool loadFormPerPath = IsLoadABFormPerPath(ab_path);
string[] dependences; //依赖ab包
if (loadFormPerPath && mABManifest_Per != null)
{
dependences = mABManifest_Per.GetAllDependencies(ab_path);
}
else
{
dependences = mABManifest_Stream.GetAllDependencies(ab_path);
}
//加载依赖包
if (dependences.Length >= 0)
{
foreach (var item in dependences)
{
if (Load_AssetBundle_And_Dependences_Recursion(item) != null)
{
Register_AB_Use(item);
}
}
}
//加载AB本体
//求当前ab的实际加载路径（绝对路径）
string ab_full_path;
if (loadFormPerPath)
{
ab_full_path = mPersistentDataPath + ab_path;
}
else
{
ab_full_path = mStreamingAssetsPath + ab_path;
}
//检查资源是否已加载
if (mLoadedAssetBundlePool.ContainsKey(ab_path))
{
//确认资源来源位置
if (mLoadedAssetBundlePool[ab_path].IsFromStreamingAssetsPath && loadFormPerPath)
{
//当前要加载的文件优先级高于已加载的，要把已加载的释放掉
mLoadedAssetBundlePool[ab_path].ab_asset.Unload(false);
mLoadedAssetBundlePool.Remove(ab_path);
}
else
{
//已经完美的加载出来了，不用管了
return(mLoadedAssetBundlePool[ab_path].ab_asset);
}
}
#if UNITY_IOS || UNITY_STANDALONE
//检查文件是否存在
if (!File.Exists(ab_full_path))
{
XLog.PrintE("[TinaX][虚拟文件系统]加载资源错误，寻址路径：" + ab_path + " ,实际检测路径：" + ab_full_path);
return(null);
}
#endif
//如果在上面没有return 掉，就正式加载
var ab = AssetBundle.LoadFromFile(ab_full_path);
//登记
var loaded_ab_data = new LoadedAssetBundle();
loaded_ab_data.Init(ab, !loadFormPerPath, ab_path, ab_full_path, dependences);
mLoadedAssetBundlePool.Add(ab_path, loaded_ab_data);
return(ab);
}