Operation handles support error queries

操作句柄支持错误信息查询。

Assets/YooAsset/Runtime/AssetSystem/Loader/AssetBundleFileLoader.cs

@@ -43,10 +43,10 @@ namespace YooAsset
 				{
 					_steps = ESteps.Done;
 					Status = EStatus.Failed;
-					return;
+					LastError = $"Invalid load mode : {BundleFileInfo.BundleName}";
+					YooLogger.Error(LastError);
 				}
-
-				if (BundleFileInfo.LoadMode == BundleInfo.ELoadMode.LoadFromRemote)
+				else if (BundleFileInfo.LoadMode == BundleInfo.ELoadMode.LoadFromRemote)
 				{
 					_steps = ESteps.Download;
 					_fileLoadPath = BundleFileInfo.GetCacheLoadPath();
@@ -83,9 +83,9 @@ namespace YooAsset
 
 				if (_downloader.HasError())
 				{
-					_downloader.ReportError();
 					_steps = ESteps.Done;
 					Status = EStatus.Failed;
+					LastError = _downloader.GetLastError();
 				}
 				else
 				{
@@ -100,9 +100,10 @@ namespace YooAsset
 				// 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)
 				{
-					YooLogger.Warning($"Not found assetBundle file : {_fileLoadPath}");
 					_steps = ESteps.Done;
 					Status = EStatus.Failed;
+					LastError = $"Not found assetBundle file : {_fileLoadPath}";
+					YooLogger.Error(LastError);
 					return;
 				}
 #endif
@@ -151,9 +152,10 @@ namespace YooAsset
 				// Check error			
 				if (CacheBundle == null)
 				{
-					YooLogger.Error($"Failed to load assetBundle file : {BundleFileInfo.BundleName}");
 					_steps = ESteps.Done;
 					Status = EStatus.Failed;
+					LastError = $"Failed to load assetBundle : {BundleFileInfo.BundleName}";
+					YooLogger.Error(LastError);
 				}
 				else
 				{

Assets/YooAsset/Runtime/AssetSystem/Loader/AssetBundleLoaderBase.cs

@@ -29,6 +29,11 @@ namespace YooAsset
 		/// </summary>
 		public EStatus Status { protected set; get; }
 
+		/// <summary>
+		/// 最近的错误信息
+		/// </summary>
+		public string LastError { protected set; get; }
+
 		/// <summary>
 		/// 是否已经销毁
 		/// </summary>
@@ -139,7 +144,7 @@ namespace YooAsset
 			// 销毁所有Providers
 			foreach (var provider in _providers)
 			{
-				provider.Destory();
+				provider.Destroy();
 			}
 
 			// 从列表里移除Providers

Assets/YooAsset/Runtime/AssetSystem/Loader/AssetBundleWebLoader.cs

@@ -41,10 +41,10 @@ namespace YooAsset
 				{
 					_steps = ESteps.Done;
 					Status = EStatus.Failed;
-					return;
+					LastError = $"Invalid load mode : {BundleFileInfo.BundleName}";
+					YooLogger.Error(LastError);
 				}
-
-				if (BundleFileInfo.LoadMode == BundleInfo.ELoadMode.LoadFromStreaming)
+				else if (BundleFileInfo.LoadMode == BundleInfo.ELoadMode.LoadFromStreaming)
 				{
 					_steps = ESteps.LoadFile;
 					_webURL = BundleFileInfo.GetStreamingLoadPath();
@@ -76,7 +76,7 @@ namespace YooAsset
 				if (_webRequest.isNetworkError || _webRequest.isHttpError)
 #endif
 				{
-					Debug.LogWarning($"Failed to get asset bundle form web : {_webURL} Error : {_webRequest.error}");
+					YooLogger.Warning($"Failed to get asset bundle form web : {_webURL} Error : {_webRequest.error}");
 					_steps = ESteps.TryLoad;
 					_tryTimer = 0;
 				}
@@ -85,9 +85,10 @@ namespace YooAsset
 					CacheBundle = DownloadHandlerAssetBundle.GetContent(_webRequest);
 					if (CacheBundle == null)
 					{
-						Debug.LogError($"Get asset bundle error : {_webRequest.error}");
 						_steps = ESteps.Done;
 						Status = EStatus.Failed;
+						LastError = $"AssetBundle file is invalid : {BundleFileInfo.BundleName}";
+						YooLogger.Error(LastError);
 					}
 					else
 					{

Assets/YooAsset/Runtime/AssetSystem/Loader/DependAssetBundleGrouper.cs

@@ -11,6 +11,7 @@ namespace YooAsset
 		/// </summary>
 		private readonly List<AssetBundleLoaderBase> _dependBundles;
 
+
 		public DependAssetBundleGrouper(string assetPath)
 		{
 			_dependBundles = AssetSystem.CreateDependAssetBundleLoaders(assetPath);
@@ -29,6 +30,36 @@ namespace YooAsset
 			return true;
 		}
 
+		/// <summary>
+		/// 依赖资源包是否全部加载成功
+		/// </summary>
+		public bool IsSucceed()
+		{
+			foreach (var loader in _dependBundles)
+			{
+				if (loader.Status != AssetBundleLoaderBase.EStatus.Succeed)
+				{
+					return false;
+				}
+			}
+			return true;
+		}
+
+		/// <summary>
+		/// 获取某个加载失败的资源包错误信息
+		/// </summary>
+		public string GetLastError()
+		{
+			foreach (var loader in _dependBundles)
+			{
+				if (loader.Status != AssetBundleLoaderBase.EStatus.Succeed)
+				{
+					return loader.LastError;
+				}
+			}
+			return string.Empty;
+		}
+
 		/// <summary>
 		/// 主线程等待异步操作完毕
 		/// </summary>