private void SelectLoaderAndPath <T>(string path, out BaseLoader loader, out string realpath) where T : class
{
if (AssetPathUtil.IsUrl(path))
{
loader = GetOrCreateNetworkLoader();
realpath = path;
}
else
{
//如果是双路径
if (path.IndexOf('|') >= 0)
{
#if UNITY_EDITOR
//编辑器下直接加载源路径
if (!isUseBundleLoader)
{
loader = GetOrCreateEditorLoader();
string[] pathPairs = path.Split('|');
string assetName = pathPairs[1];
realpath = assetName;
}
else
{
loader = GetOrCreateBundleLoader();
realpath = path;
}
#else
loader = GetOrCreateBundleLoader();
realpath = path;
#endif
}
else
{
//是否是Asset开头的
if (typeof(T) == typeof(byte[])) //二进制加载器
{
loader = GetOrCreateBinaryLoader();
realpath = path;
return;
}
#if UNITY_EDITOR
else if (path.StartsWith("assets", StringComparison.OrdinalIgnoreCase))
{
loader = GetOrCreateEditorLoader();
realpath = path;
return;
}
#endif
//最后采用ResourceLoader
loader = GetOrCreateResourceeLoader();
realpath = path;
}
}
}
private void LoadAssetPrimitiveSync(AssetLoadHandler handler)
{
//同步的方法
if (string.IsNullOrEmpty(handler.path))
{
LoadAssetPrimitiveCallback(handler, AssetLoadResult.EMPTY_RESULT);
return;
}
string assetPath = handler.path;
string assetName = null;
AssetPathUtil.SpliteBundlePath(handler.path, out assetPath, out assetName);
Object asset = null;
bool isDone = false;
//是否已经在加载池中,如果是就直接返回,引用数加1
var bundleObject = GetBundleObject(assetPath);
if (bundleObject != null)
{
asset = bundleObject.assetBundle;
isDone = true;
}
else
{
//不支持同步的网络下载
if (AssetPathUtil.IsUrl(assetPath))
{
asset = null;
isDone = false;
}
else
{
handler.timeoutChecker.stayTime = HANDLER_BUNDLE_LOCAL_STAY_TIME; //本地Handler超时时间
var assetObj = AssetBundle.LoadFromFile(assetPath);
asset = assetObj;
isDone = true;
}
LoadAssetBundleCallback(handler, asset as AssetBundle);
}
////////////////////////////////
var assetBundle = asset as AssetBundle;
if (assetBundle != null)
{
if (!string.IsNullOrEmpty(assetName))
{
asset = assetBundle.LoadAsset(assetName);
isDone = true;
}
}
var result = new AssetLoadResult(asset, isDone);
LoadAssetPrimitiveCallback(handler, result);
}
//加载元操作
private IEnumerator LoadAssetPrimitiveAsync(AssetLoadHandler handler)
{
if (string.IsNullOrEmpty(handler.path))
{
LoadAssetPrimitiveCallback(handler, AssetLoadResult.EMPTY_RESULT);
yield break;
}
string assetPath = handler.path;
string assetName = null;
AssetPathUtil.SpliteBundlePath(handler.path, out assetPath, out assetName);
Object asset = null;
bool isDone = false;
//是否已经在加载池中,如果是就直接返回,引用数加1
var bundleObject = GetBundleObject(assetPath);
if (bundleObject != null)
{
asset = bundleObject.assetBundle;
isDone = true;
}
else
{
if (AssetPathUtil.IsUrl(assetPath)) //是否为网络路径
{
handler.timeoutChecker.stayTime = HANDLER_BUNDLE_NETWORK_STAY_TIME; //网络Handler超时时间
var request = UnityWebRequestAssetBundle.GetAssetBundle(assetPath);
request.timeout = (int)handler.timeoutChecker.stayTime;
m_handlerWithRequestMap[handler.id] = new RequestObj()
{
id = handler.id,
webRequest = request,
};
yield return(request.SendWebRequest());
asset = DownloadHandlerAssetBundle.GetContent(request);
isDone = request.isDone;
}
else
{
handler.timeoutChecker.stayTime = HANDLER_BUNDLE_LOCAL_STAY_TIME; //本地Handler超时时间
var request = AssetBundle.LoadFromFileAsync(assetPath);
m_handlerWithRequestMap[handler.id] = new RequestObj()
{
id = handler.id,
abRequest = request,
};
yield return(request);
asset = request.assetBundle;
isDone = request.isDone;
}
//先把加载到的AssetBundle加入记录缓存,并且标记引用次数+1
//不记录Bundle为空的项
LoadAssetBundleCallback(handler, asset as AssetBundle);
}
////////////////////////////////
var assetBundle = asset as AssetBundle;
if (assetBundle != null)
{
if (!string.IsNullOrEmpty(assetName))
{
var loadRequest = assetBundle.LoadAssetAsync(assetName);
yield return(loadRequest);
asset = loadRequest.asset;
isDone = loadRequest.isDone;
}
}
var result = new AssetLoadResult(asset, isDone);
LoadAssetPrimitiveCallback(handler, result);
}