/// <summary>
/// 轮询更新
/// </summary>
public override void Update()
{
if (_steps == ESteps.Done)
{
return;
}
if (_steps == ESteps.None)
{
if (MainBundleInfo.IsInvalid)
{
_steps = ESteps.Done;
Status = EStatus.Failed;
LastError = $"The bundle info is invalid : {MainBundleInfo.BundleName}";
YooLogger.Error(LastError);
return;
}
if (MainBundleInfo.LoadMode == BundleInfo.ELoadMode.LoadFromStreaming)
{
_steps = ESteps.LoadFile;
_webURL = MainBundleInfo.GetStreamingLoadPath();
}
else
{
throw new System.NotImplementedException(MainBundleInfo.LoadMode.ToString());
}
}
// 1. 从服务器或缓存中获取AssetBundle文件
if (_steps == ESteps.LoadFile)
{
string hash = StringUtility.RemoveExtension(MainBundleInfo.Hash);
_webRequest = UnityWebRequestAssetBundle.GetAssetBundle(_webURL, Hash128.Parse(hash));
_webRequest.SendWebRequest();
_steps = ESteps.CheckFile;
}
// 2. 检测获取的AssetBundle文件
if (_steps == ESteps.CheckFile)
{
if (_webRequest.isDone == false)
{
return;
}
#if UNITY_2020_1_OR_NEWER
if (_webRequest.result != UnityWebRequest.Result.Success)
#else
if (_webRequest.isNetworkError || _webRequest.isHttpError)
#endif
{
YooLogger.Warning($"Failed to get asset bundle form web : {_webURL} Error : {_webRequest.error}");
_steps = ESteps.TryLoad;
_tryTimer = 0;
}
else
{
CacheBundle = DownloadHandlerAssetBundle.GetContent(_webRequest);
if (CacheBundle == null)
{
_steps = ESteps.Done;
Status = EStatus.Failed;
LastError = $"AssetBundle file is invalid : {MainBundleInfo.BundleName}";
YooLogger.Error(LastError);
}
else
{
_steps = ESteps.Done;
Status = EStatus.Succeed;
}
}
}
// 3. 如果获取失败，重新尝试
if (_steps == ESteps.TryLoad)
{
_tryTimer += Time.unscaledDeltaTime;
if (_tryTimer > 1f)
{
_webRequest.Dispose();
_webRequest = null;
_steps = ESteps.LoadFile;
}
}
}
/// <summary>
/// 轮询更新
/// </summary>
public override void Update()
{
if (_steps == ESteps.Done)
{
return;
}
if (_steps == ESteps.None)
{
if (MainBundleInfo.IsInvalid)
{
_steps = ESteps.Done;
Status = EStatus.Failed;
LastError = $"The bundle info is invalid : {MainBundleInfo.BundleName}";
YooLogger.Error(LastError);
return;
}
if (MainBundleInfo.LoadMode == BundleInfo.ELoadMode.LoadFromRemote)
{
_steps = ESteps.Download;
_fileLoadPath = MainBundleInfo.GetCacheLoadPath();
}
else if (MainBundleInfo.LoadMode == BundleInfo.ELoadMode.LoadFromStreaming)
{
_steps = ESteps.LoadFile;
_fileLoadPath = MainBundleInfo.GetStreamingLoadPath();
}
else if (MainBundleInfo.LoadMode == BundleInfo.ELoadMode.LoadFromCache)
{
_steps = ESteps.LoadFile;
_fileLoadPath = MainBundleInfo.GetCacheLoadPath();
}
else
{
throw new System.NotImplementedException(MainBundleInfo.LoadMode.ToString());
}
}
// 1. 从服务器下载
if (_steps == ESteps.Download)
{
int failedTryAgain = int.MaxValue;
_downloader = DownloadSystem.BeginDownload(MainBundleInfo, failedTryAgain);
_steps = ESteps.CheckDownload;
}
// 2. 检测服务器下载结果
if (_steps == ESteps.CheckDownload)
{
if (_downloader.IsDone() == false)
{
return;
}
if (_downloader.HasError())
{
_steps = ESteps.Done;
Status = EStatus.Failed;
LastError = _downloader.GetLastError();
}
else
{
_steps = ESteps.LoadFile;
}
}
// 3. 加载AssetBundle
if (_steps == ESteps.LoadFile)
{
#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(_fileLoadPath) == false)
{
_steps = ESteps.Done;
Status = EStatus.Failed;
LastError = $"Not found assetBundle file : {_fileLoadPath}";
YooLogger.Error(LastError);
return;
}
#endif
// Load assetBundle file
if (MainBundleInfo.IsEncrypted)
{
if (AssetSystem.DecryptionServices == null)
{
throw new Exception($"{nameof(AssetBundleFileLoader)} need {nameof(IDecryptionServices)} : {MainBundleInfo.BundleName}");
}
ulong offset = AssetSystem.DecryptionServices.GetFileOffset();
if (_isWaitForAsyncComplete)
{
CacheBundle = AssetBundle.LoadFromFile(_fileLoadPath, 0, offset);
}
else
{
_cacheRequest = AssetBundle.LoadFromFileAsync(_fileLoadPath, 0, offset);
}
}
else
{
if (_isWaitForAsyncComplete)
{
CacheBundle = AssetBundle.LoadFromFile(_fileLoadPath);
}
else
{
_cacheRequest = AssetBundle.LoadFromFileAsync(_fileLoadPath);
}
}
_steps = ESteps.CheckFile;
}
// 4. 检测AssetBundle加载结果
if (_steps == ESteps.CheckFile)
{
if (_cacheRequest != null)
{
if (_isWaitForAsyncComplete)
{
// 强制挂起主线程（注意：该操作会很耗时）
YooLogger.Warning("Suspend the main thread to load unity bundle.");
CacheBundle = _cacheRequest.assetBundle;
}
else
{
if (_cacheRequest.isDone == false)
{
return;
}
CacheBundle = _cacheRequest.assetBundle;
}
}
// Check error
if (CacheBundle == null)
{
_steps = ESteps.Done;
Status = EStatus.Failed;
LastError = $"Failed to load assetBundle : {MainBundleInfo.BundleName}";
YooLogger.Error(LastError);
}
else
{
_steps = ESteps.Done;
Status = EStatus.Succeed;
}
}
}