/// <summary>
/// 加载资源对象
/// </summary>
/// <param name="assetName">资源对象名称</param>
/// <param name="assetType">资源对象类型</param>
/// <param name="callback">结果回调</param>
public void LoadAsset(string assetName, System.Type assetType, System.Action <UnityEngine.Object> callback)
{
// 如果已经提交相同请求
AssetObjectLoader loader = TryGetAssetObjectLoaderInternal(assetName);
if (loader != null)
{
if (loader.IsDone())
{
callback?.Invoke(loader.AssetObject);
}
else
{
loader.LoadCallback += callback;
}
}
else
{
// 创建加载器
AssetObjectLoader newLoader = new AssetObjectLoader(_cacheBundle, assetName, assetType);
// 新增下载需求
_assetObjectLoaders.Add(newLoader);
newLoader.LoadCallback = callback;
newLoader.Update(); //立刻轮询
}
}
// 获取一个对象加载器
private AssetObjectLoader TryGetAssetObjectLoaderInternal(string assetName)
{
AssetObjectLoader loader = null;
for (int i = 0; i < _assetObjectLoaders.Count; i++)
{
AssetObjectLoader temp = _assetObjectLoaders[i];
if (temp.AssetName.Equals(assetName))
{
loader = temp;
break;
}
}
return(loader);
}
public override void LoadMainAsset(EAssetType assetType, OnAssetObjectLoad callback)
{
// Check error
if (LoadState != EAssetFileLoadState.LoadAssetFileOK)
{
LogSystem.Log(ELogType.Error, $"Can not load asset object, {nameof(AssetBundleLoader)} is not ok : {LoadPath}");
callback?.Invoke(null, false);
return;
}
// Check secne
// 注意：场景文件在获取资源对象的时候直接返回成功
if (assetType == EAssetType.Scene)
{
callback?.Invoke(null, true);
return;
}
// 如果加载器不存在
if (_mainAssetLoader == null)
{
string assetName = AssetSystem.GetCacheFileName(LoadPath);
_mainAssetLoader = new AssetObjectLoader(_cacheBundle, assetName, assetType);
_mainAssetLoader.LoadCallback = callback;
_mainAssetLoader.Update(); //立刻轮询
}
else
{
if (_mainAssetLoader.IsDone())
{
callback?.Invoke(_mainAssetLoader.AssetObject, _mainAssetLoader.LoadState == EAssetObjectLoadState.LoadAssetObjectOK);
}
else
{
_mainAssetLoader.LoadCallback += callback;
}
}
}
