internal override void Update()
{
if (_steps == ESteps.None || _steps == ESteps.Done)
{
return;
}
// 1. 准备工作
if (_steps == ESteps.Prepare)
{
if (_bundleInfo.LoadMode == BundleInfo.ELoadMode.None)
{
_steps = ESteps.Done;
Status = EOperationStatus.Failed;
Error = $"Bundle info is invalid : {_bundleInfo.BundleName}";
}
else if (_bundleInfo.LoadMode == BundleInfo.ELoadMode.LoadFromRemote)
{
_steps = ESteps.DownloadFromWeb;
}
else if (_bundleInfo.LoadMode == BundleInfo.ELoadMode.LoadFromStreaming)
{
_steps = ESteps.DownloadFromApk;
}
else if (_bundleInfo.LoadMode == BundleInfo.ELoadMode.LoadFromCache)
{
_steps = ESteps.CheckAndCopyFile;
}
else
{
throw new System.NotImplementedException(_bundleInfo.LoadMode.ToString());
}
}
// 2. 从服务器下载
if (_steps == ESteps.DownloadFromWeb)
{
int failedTryAgain = int.MaxValue;
_downloader = DownloadSystem.BeginDownload(_bundleInfo, failedTryAgain);
_steps = ESteps.CheckDownloadFromWeb;
}
// 3. 检测服务器下载结果
if (_steps == ESteps.CheckDownloadFromWeb)
{
Progress = _downloader.DownloadProgress;
if (_downloader.IsDone() == false)
{
return;
}
if (_downloader.HasError())
{
_steps = ESteps.Done;
Status = EOperationStatus.Failed;
Error = _downloader.GetLastError();
}
else
{
_steps = ESteps.CheckAndCopyFile;
}
}
// 4. 从APK拷贝文件
if (_steps == ESteps.DownloadFromApk)
{
string downloadURL = PathHelper.ConvertToWWWPath(_bundleInfo.GetStreamingLoadPath());
_fileRequester = new UnityWebFileRequester();
_fileRequester.SendRequest(downloadURL, GetCachePath());
_steps = ESteps.CheckDownloadFromApk;
}
// 5. 检测APK拷贝文件结果
if (_steps == ESteps.CheckDownloadFromApk)
{
Progress = _fileRequester.Progress();
if (_fileRequester.IsDone() == false)
{
return;
}
if (_fileRequester.HasError())
{
_steps = ESteps.Done;
Status = EOperationStatus.Failed;
Error = _fileRequester.GetError();
}
else
{
_steps = ESteps.CheckAndCopyFile;
}
_fileRequester.Dispose();
}
// 6. 检测并拷贝原生文件
if (_steps == ESteps.CheckAndCopyFile)
{
// 如果不需要保存文件
if (string.IsNullOrEmpty(CopyPath))
{
_steps = ESteps.Done;
Status = EOperationStatus.Succeed;
return;
}
// 如果原生文件已经存在，则验证其完整性
if (File.Exists(CopyPath))
{
bool result = DownloadSystem.CheckContentIntegrity(CopyPath, _bundleInfo.SizeBytes, _bundleInfo.CRC);
if (result)
{
_steps = ESteps.Done;
Status = EOperationStatus.Succeed;
return;
}
else
{
File.Delete(CopyPath);
}
}
try
{
FileUtility.CreateFileDirectory(CopyPath);
File.Copy(GetCachePath(), CopyPath, true);
_steps = ESteps.Done;
Status = EOperationStatus.Succeed;
}
catch (System.Exception e)
{
_steps = ESteps.Done;
Status = EOperationStatus.Failed;
Error = e.ToString();
}
}
}
/// <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;
}
}
}