protected override void OnUnLoad(string path)
{
if (!string.IsNullOrEmpty(path))
{
string assetPath = path;
AssetPathUtil.SpliteBundlePath(path, out assetPath, out _);
if (m_bundlesMap.TryGetValue(assetPath, out var bundleObj))
{
UnloadBundleObject(bundleObj);
}
}
}
protected override LoadMethod OnLoadMethod(AssetLoadHandler handler)
{
//如果缓冲池有,则下一帧回调,否则协程回调
string assetPath = handler.path;
AssetPathUtil.SpliteBundlePath(handler.path, out assetPath, out _);
if (GetBundleObject(assetPath) != null)
{
return(LoadMethod.Nextframe);
}
return(LoadMethod.Coroutine);
}
protected override void OnStartLoad(AssetLoadHandler handler)
{
var mainHandler = handler;
string assetPath = mainHandler.path;
AssetPathUtil.SpliteBundlePath(handler.path, out assetPath, out _);
//加载顺序决定是否能完全卸载,如果先加载依赖,在加载自己,就能够完全释放(这个与释放顺序无关
var mainDependencies = GetBundleDependencies(assetPath, false);
if (mainDependencies != null && mainDependencies.Length > 0)
{
foreach (var subDependence in mainDependencies)
{
var subHandler = GetOrCreateHandler(subDependence);
mainHandler.AddChild(subHandler);
StartLoadWithHandler(subHandler);
}
}
base.OnStartLoad(mainHandler);
}
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);
}