private AssetOperationHandle LoadInternal(string assetName, System.Type assetType, IAssetParam param)
{
if (_cacheLoader == null)
{
_cacheLoader = AssetSystem.CreateFileLoader(Location);
}
return(_cacheLoader.LoadAssetAsync(assetName, assetType, param));
}
/// <summary>
/// 释放资源
/// </summary>
public void Release()
{
if (_cacheLoader != null)
{
_cacheLoader.Release();
_cacheLoader = null;
}
Location = string.Empty;
}
/// <summary>
/// 强制回收所有资源
/// </summary>
public static void ForceReleaseAll()
{
for (int i = 0; i < _fileLoaders.Count; i++)
{
AssetFileLoader loader = _fileLoaders[i];
loader.Destroy(true);
}
_fileLoaders.Clear();
// 释放所有资源
Resources.UnloadUnusedAssets();
}
/// <summary>
/// 资源回收
/// 卸载引用计数为零的资源
/// </summary>
public static void Release()
{
for (int i = _fileLoaders.Count - 1; i >= 0; i--)
{
AssetFileLoader loader = _fileLoaders[i];
if (loader.IsDone() && loader.RefCount <= 0)
{
loader.Destroy(true);
_fileLoaders.RemoveAt(i);
}
}
}
public static int DebugGetFileLoaderFailedCount()
{
int count = 0;
for (int i = 0; i < _fileLoaders.Count; i++)
{
AssetFileLoader temp = _fileLoaders[i];
if (temp.States == EAssetFileLoaderStates.LoadAssetFileFailed || temp.GetFailedProviderCount() > 0)
{
count++;
}
}
return(count);
}
// 从列表里获取加载器
private static AssetFileLoader TryGetFileLoader(string loadPath)
{
AssetFileLoader loader = null;
for (int i = 0; i < _fileLoaders.Count; i++)
{
AssetFileLoader temp = _fileLoaders[i];
if (temp.LoadPath.Equals(loadPath))
{
loader = temp;
break;
}
}
return(loader);
}
internal static AssetFileLoader CreateFileLoaderInternal(string loadPath, string manifestPath)
{
// 如果加载器已经存在
AssetFileLoader loader = TryGetFileLoader(loadPath);
if (loader != null)
{
loader.Reference(); //引用计数
return(loader);
}
// 创建加载器
AssetFileLoader newLoader = null;
if (SystemMode == EAssetSystemMode.EditorMode)
{
newLoader = new AssetDatabaseFileLoader(loadPath);
}
else if (SystemMode == EAssetSystemMode.ResourcesMode)
{
newLoader = new AssetResourcesFileLoader(loadPath);
}
else if (SystemMode == EAssetSystemMode.BundleMode)
{
newLoader = new AssetBundleFileLoader(loadPath, manifestPath);
}
else
{
throw new NotImplementedException($"{SystemMode}");
}
// 新增下载需求
_fileLoaders.Add(newLoader);
newLoader.Reference(); //引用计数
return(newLoader);
}
public AssetResourcesProvider(AssetFileLoader owner, string assetName, System.Type assetType)
: base(owner, assetName, assetType)
{
}
public override void Update()
{
// 如果资源文件加载完毕
if (States == EAssetFileLoaderStates.LoadAssetFileOK || States == EAssetFileLoaderStates.LoadAssetFileFailed)
{
UpdateAllProvider();
return;
}
if (States == EAssetFileLoaderStates.None)
{
States = EAssetFileLoaderStates.LoadDepends;
}
// 1. 加载所有依赖项
if (States == EAssetFileLoaderStates.LoadDepends)
{
string[] dependencies = AssetSystem.BundleServices.GetDirectDependencies(_manifestPath);
if (dependencies.Length > 0)
{
foreach (string dpManifestPath in dependencies)
{
string dpLoadPath = AssetSystem.BundleServices.GetAssetBundleLoadPath(dpManifestPath);
AssetFileLoader dpLoader = AssetSystem.CreateFileLoaderInternal(dpLoadPath, dpManifestPath);
_depends.Add(dpLoader);
}
}
States = EAssetFileLoaderStates.CheckDepends;
}
// 2. 检测所有依赖完成状态
if (States == EAssetFileLoaderStates.CheckDepends)
{
foreach (var dpLoader in _depends)
{
if (dpLoader.IsDone() == false)
{
return;
}
}
States = EAssetFileLoaderStates.LoadAssetFile;
}
// 3. 加载AssetBundle
if (States == EAssetFileLoaderStates.LoadAssetFile)
{
#if UNITY_EDITOR
// 注意：Unity2017.4编辑器模式下，如果AssetBundle文件不存在会导致编辑器崩溃，这里做了预判。
if (System.IO.File.Exists(LoadPath) == false)
{
LogSystem.Log(ELogType.Warning, $"Not found assetBundle file : {LoadPath}");
States = EAssetFileLoaderStates.LoadAssetFileFailed;
return;
}
#endif
// Load assetBundle file
_cacheRequest = AssetBundle.LoadFromFileAsync(LoadPath);
States = EAssetFileLoaderStates.CheckAssetFile;
}
// 4. 检测AssetBundle加载结果
if (States == EAssetFileLoaderStates.CheckAssetFile)
{
if (_cacheRequest.isDone == false)
{
return;
}
CacheBundle = _cacheRequest.assetBundle;
// Check error
if (CacheBundle == null)
{
LogSystem.Log(ELogType.Warning, $"Failed to load assetBundle file : {LoadPath}");
States = EAssetFileLoaderStates.LoadAssetFileFailed;
}
else
{
States = EAssetFileLoaderStates.LoadAssetFileOK;
}
}
}
public AssetSceneProvider(AssetFileLoader owner, string assetName, System.Type assetType, SceneInstanceParam param)
: base(owner, assetName, assetType)
{
_param = param;
}
public AssetBundleProvider(AssetFileLoader owner, string assetName, System.Type assetType)
: base(owner, assetName, assetType)
{
_loader = owner as AssetBundleFileLoader;
}