/// <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.UnLoad(true);
_fileLoaders.RemoveAt(i);
}
}
}
/// <summary>
/// 从缓存列表里获取加载器，如果不存在创建一个新的加载器并添加到列表
/// </summary>
public static AssetFileLoader GetFileLoader(bool isStreamScene, string loadPath, System.Action <AssetFileLoader> callback, string manifestPath)
{
// 如果已经提交相同请求
AssetFileLoader loader = TryGetFileLoaderInternal(loadPath);
if (loader != null)
{
loader.Reference(); //引用计数
if (loader.IsDone())
{
if (callback != null)
{
callback.Invoke(loader);
}
}
else
{
if (callback != null)
{
loader.LoadCallback += callback;
}
}
return(loader);
}
// 创建加载器
AssetFileLoader newLoader = null;
if (AssetLoadMode == EAssetLoadMode.EditorMode)
{
newLoader = new AssetDatabaseLoader(isStreamScene, loadPath);
}
else if (AssetLoadMode == EAssetLoadMode.ResourceMode)
{
newLoader = new AssetResourceLoader(isStreamScene, loadPath);
}
else if (AssetLoadMode == EAssetLoadMode.BundleMode)
{
newLoader = new AssetBundleLoader(isStreamScene, loadPath, manifestPath);
}
else
{
throw new NotImplementedException($"{AssetLoadMode}");
}
// 新增下载需求
_fileLoaders.Add(newLoader);
newLoader.LoadCallback = callback;
newLoader.Reference(); //引用计数
newLoader.Update(); //立刻轮询
return(newLoader);
}