fix #185

Assets/YooAsset/Runtime/ResourceManager/Handle/SceneHandle.cs

@@ -37,6 +37,19 @@ namespace YooAsset
 			}
 		}
 
+		/// <summary>
+		/// 场景名称
+		/// </summary>
+		public string SceneName
+		{
+			get
+			{
+				if (IsValidWithWarning == false)
+					return string.Empty;
+				return Provider.SceneName;
+			}
+		}
+
 		/// <summary>
 		/// 场景对象
 		/// </summary>
@@ -152,10 +165,8 @@ namespace YooAsset
 			}
 
 			// 卸载子场景
-			Scene sceneObject = SceneObject;
-			Provider.Impl.UnloadSubScene(Provider);
 			{
-				var operation = new UnloadSceneOperation(sceneObject);
+				var operation = new UnloadSceneOperation(Provider);
 				OperationSystem.StartOperation(packageName, operation);
 				return operation;
 			}

Assets/YooAsset/Runtime/ResourceManager/Operation/UnloadSceneOperation.cs

@@ -8,68 +8,81 @@ namespace YooAsset
 	/// </summary>
 	public sealed class UnloadSceneOperation : AsyncOperationBase
 	{
-		private enum EFlag
-		{
-			Normal,
-			Error,
-		}
 		private enum ESteps
 		{
 			None,
-			UnLoad,
+			CheckError,
+			PrepareDone,
+			UnLoadScene,
 			Checking,
 			Done,
 		}
 
-		private readonly EFlag _flag;
 		private ESteps _steps = ESteps.None;
-		private Scene _scene;
+		private readonly string _error;
+		private readonly ProviderBase _provider;
 		private AsyncOperation _asyncOp;
 
 		internal UnloadSceneOperation(string error)
 		{
-			_flag = EFlag.Error;
+			_error = error;
-			Error = error;
 		}
-		internal UnloadSceneOperation(Scene scene)
+		internal UnloadSceneOperation(ProviderBase provider)
 		{
-			_flag = EFlag.Normal;
+			_error = null;
-			_scene = scene;
+			_provider = provider;
 		}
 		internal override void InternalOnStart()
 		{
-			if (_flag == EFlag.Normal)
+			_steps = ESteps.CheckError;
-			{
-				_steps = ESteps.UnLoad;
-			}
-			else if (_flag == EFlag.Error)
-			{
-				_steps = ESteps.Done;
-				Status = EOperationStatus.Failed;
-			}
-			else
-			{
-				throw new System.NotImplementedException(_flag.ToString());
-			}
 		}
 		internal override void InternalOnUpdate()
 		{
 			if (_steps == ESteps.None || _steps == ESteps.Done)
 				return;
 
-			if (_steps == ESteps.UnLoad)
+			if (_steps == ESteps.CheckError)
 			{
-				if (_scene.IsValid() && _scene.isLoaded)
+				if (string.IsNullOrEmpty(_error) == false)
-				{
-					_asyncOp = SceneManager.UnloadSceneAsync(_scene);
-					_steps = ESteps.Checking;
-				}
-				else
 				{
 					_steps = ESteps.Done;
 					Status = EOperationStatus.Failed;
-					Error = "Scene is invalid or is not loaded.";
+					Error = _error;
+					return;
 				}
+
+				_steps = ESteps.PrepareDone;
+			}
+
+			if(_steps == ESteps.PrepareDone)
+			{
+				if (_provider.IsDone == false)
+					return;
+
+				if (_provider.SceneObject.IsValid() == false)
+				{
+					_steps = ESteps.Done;
+					Status = EOperationStatus.Failed;
+					Error = "Scene is invalid !";
+					return;
+				}
+
+				if (_provider.SceneObject.isLoaded == false)
+				{
+					_steps = ESteps.Done;
+					Status = EOperationStatus.Failed;
+					Error = "Scene is not loaded !";
+					return;
+				}
+
+				_steps = ESteps.UnLoadScene;
+			}
+
+			if (_steps == ESteps.UnLoadScene)
+			{
+				_asyncOp = SceneManager.UnloadSceneAsync(_provider.SceneObject);
+				_provider.ResourceMgr.UnloadSubScene(_provider.SceneName);
+				_steps = ESteps.Checking;		
 			}
 
 			if (_steps == ESteps.Checking)

Assets/YooAsset/Runtime/ResourceManager/Provider/BundledAllAssetsProvider.cs

@@ -8,7 +8,7 @@ namespace YooAsset
 	{
 		private AssetBundleRequest _cacheRequest;
 		
-		public BundledAllAssetsProvider(ResourceManager impl, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(impl, providerGUID, providerPriority, assetInfo)
+		public BundledAllAssetsProvider(ResourceManager manager, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(manager, providerGUID, providerPriority, assetInfo)
 		{
 		}
 		public override void Update()

Assets/YooAsset/Runtime/ResourceManager/Provider/BundledAssetProvider.cs

@@ -8,7 +8,7 @@ namespace YooAsset
 	{
 		private AssetBundleRequest _cacheRequest;
 
-		public BundledAssetProvider(ResourceManager impl, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(impl, providerGUID, providerPriority, assetInfo)
+		public BundledAssetProvider(ResourceManager manager, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(manager, providerGUID, providerPriority, assetInfo)
 		{
 		}
 		public override void Update()

Assets/YooAsset/Runtime/ResourceManager/Provider/BundledRawFileProvider.cs

@@ -3,7 +3,7 @@ namespace YooAsset
 {
 	internal class BundledRawFileProvider : ProviderBase
 	{
-		public BundledRawFileProvider(ResourceManager impl, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(impl, providerGUID, providerPriority, assetInfo)
+		public BundledRawFileProvider(ResourceManager manager, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(manager, providerGUID, providerPriority, assetInfo)
 		{
 		}
 		public override void Update()

Assets/YooAsset/Runtime/ResourceManager/Provider/BundledSceneProvider.cs

@@ -9,14 +9,13 @@ namespace YooAsset
 	internal sealed class BundledSceneProvider : ProviderBase
 	{
 		public readonly LoadSceneMode SceneMode;
-		private readonly string _sceneName;
 		private readonly bool _suspendLoad;
 		private AsyncOperation _asyncOperation;
 
-		public BundledSceneProvider(ResourceManager impl, string providerGUID, uint providerPriority, AssetInfo assetInfo, LoadSceneMode sceneMode, bool suspendLoad) : base(impl, providerGUID, providerPriority, assetInfo)
+		public BundledSceneProvider(ResourceManager manager, string providerGUID, uint providerPriority, AssetInfo assetInfo, LoadSceneMode sceneMode, bool suspendLoad) : base(manager, providerGUID, providerPriority, assetInfo)
 		{
 			SceneMode = sceneMode;
-			_sceneName = Path.GetFileNameWithoutExtension(assetInfo.AssetPath);
+			SceneName = Path.GetFileNameWithoutExtension(assetInfo.AssetPath);
 			_suspendLoad = suspendLoad;
 		}
 		public override void Update()
@@ -73,7 +72,7 @@ namespace YooAsset
 				else
 				{
 					Status = EStatus.Failed;
-					LastError = $"Failed to load scene : {_sceneName}";
+					LastError = $"Failed to load scene : {MainAssetInfo.AssetPath}";
 					YooLogger.Error(LastError);
 					InvokeCompletion();
 				}

Assets/YooAsset/Runtime/ResourceManager/Provider/BundledSubAssetsProvider.cs

@@ -8,7 +8,7 @@ namespace YooAsset
 	{
 		private AssetBundleRequest _cacheRequest;
 
-		public BundledSubAssetsProvider(ResourceManager impl, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(impl, providerGUID, providerPriority, assetInfo)
+		public BundledSubAssetsProvider(ResourceManager manager, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(manager, providerGUID, providerPriority, assetInfo)
 		{
 		}
 		public override void Update()

Assets/YooAsset/Runtime/ResourceManager/Provider/DatabaseAllAssetsProvider.cs

@@ -6,7 +6,7 @@ namespace YooAsset
 {
 	internal sealed class DatabaseAllAssetsProvider : ProviderBase
 	{
-		public DatabaseAllAssetsProvider(ResourceManager impl, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(impl, providerGUID, providerPriority, assetInfo)
+		public DatabaseAllAssetsProvider(ResourceManager manager, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(manager, providerGUID, providerPriority, assetInfo)
 		{
 		}
 		public override void Update()

Assets/YooAsset/Runtime/ResourceManager/Provider/DatabaseAssetProvider.cs

@@ -6,7 +6,7 @@ namespace YooAsset
 {
 	internal sealed class DatabaseAssetProvider : ProviderBase
 	{
-		public DatabaseAssetProvider(ResourceManager impl, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(impl, providerGUID, providerPriority, assetInfo)
+		public DatabaseAssetProvider(ResourceManager manager, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(manager, providerGUID, providerPriority, assetInfo)
 		{
 		}
 		public override void Update()

Assets/YooAsset/Runtime/ResourceManager/Provider/DatabaseRawFileProvider.cs

@@ -3,7 +3,7 @@ namespace YooAsset
 {
 	internal class DatabaseRawFileProvider : ProviderBase
 	{
-		public DatabaseRawFileProvider(ResourceManager impl, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(impl, providerGUID, providerPriority, assetInfo)
+		public DatabaseRawFileProvider(ResourceManager manager, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(manager, providerGUID, providerPriority, assetInfo)
 		{
 		}
 		public override void Update()

Assets/YooAsset/Runtime/ResourceManager/Provider/DatabaseSceneProvider.cs

@@ -1,4 +1,7 @@
-using UnityEngine;
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using UnityEngine;
 using UnityEngine.SceneManagement;
 
 namespace YooAsset
@@ -9,9 +12,10 @@ namespace YooAsset
 		private readonly bool _suspendLoad;
 		private AsyncOperation _asyncOperation;
 
-		public DatabaseSceneProvider(ResourceManager impl, string providerGUID, uint providerPriority, AssetInfo assetInfo, LoadSceneMode sceneMode, bool suspendLoad) : base(impl, providerGUID, providerPriority, assetInfo)
+		public DatabaseSceneProvider(ResourceManager manager, string providerGUID, uint providerPriority, AssetInfo assetInfo, LoadSceneMode sceneMode, bool suspendLoad) : base(manager, providerGUID, providerPriority, assetInfo)
 		{
 			SceneMode = sceneMode;
+			SceneName = Path.GetFileNameWithoutExtension(assetInfo.AssetPath);
 			_suspendLoad = suspendLoad;
 		}
 		public override void Update()

Assets/YooAsset/Runtime/ResourceManager/Provider/DatabaseSubAssetsProvider.cs

@@ -6,7 +6,7 @@ namespace YooAsset
 {
 	internal sealed class DatabaseSubAssetsProvider : ProviderBase
 	{
-		public DatabaseSubAssetsProvider(ResourceManager impl, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(impl, providerGUID, providerPriority, assetInfo)
+		public DatabaseSubAssetsProvider(ResourceManager manager, string providerGUID, uint providerPriority, AssetInfo assetInfo) : base(manager, providerGUID, providerPriority, assetInfo)
 		{
 		}
 		public override void Update()

Assets/YooAsset/Runtime/ResourceManager/Provider/ProviderBase.cs

@@ -31,7 +31,7 @@ namespace YooAsset
 		/// <summary>
 		/// 所属资源系统
 		/// </summary>
-		public ResourceManager Impl { private set; get; }
+		public ResourceManager ResourceMgr { private set; get; }
 
 		/// <summary>
 		/// 资源信息
@@ -53,6 +53,11 @@ namespace YooAsset
 		/// </summary>
 		public UnityEngine.SceneManagement.Scene SceneObject { protected set; get; }
 
+		/// <summary>
+		/// 加载的场景名称
+		/// </summary>
+		public string SceneName { protected set; get; }
+
 		/// <summary>
 		/// 原生文件路径
 		/// </summary>
@@ -103,21 +108,21 @@ namespace YooAsset
 		private readonly List<HandleBase> _handles = new List<HandleBase>();
 
 
-		public ProviderBase(ResourceManager impl, string providerGUID, uint providerPriority, AssetInfo assetInfo)
+		public ProviderBase(ResourceManager manager, string providerGUID, uint providerPriority, AssetInfo assetInfo)
 		{
-			Impl = impl;
+			ResourceMgr = manager;
 			ProviderGUID = providerGUID;
 			ProviderPriority = providerPriority;
 			MainAssetInfo = assetInfo;
 
 			// 创建资源包加载器
-			if (impl != null)
+			if (manager != null)
 			{
-				OwnerBundle = impl.CreateOwnerAssetBundleLoader(assetInfo);
+				OwnerBundle = manager.CreateOwnerAssetBundleLoader(assetInfo);
 				OwnerBundle.Reference();
 				OwnerBundle.AddProvider(this);
 
-				var dependList = impl.CreateDependAssetBundleLoaders(assetInfo);
+				var dependList = manager.CreateDependAssetBundleLoaders(assetInfo);
 				DependBundles = new DependAssetBundles(dependList);
 				DependBundles.Reference();
 			}
@@ -128,14 +133,6 @@ namespace YooAsset
 		/// </summary>
 		public abstract void Update();
 
-		/// <summary>
-		/// 排序接口实现方法
-		/// </summary>
-		public int CompareTo(ProviderBase other)
-		{
-			return other.ProviderPriority.CompareTo(this.ProviderPriority);
-		}
-
 		/// <summary>
 		/// 销毁资源提供者
 		/// </summary>
@@ -281,6 +278,13 @@ namespace YooAsset
 			}
 		}
 
+		#region 排序接口实现
+		public int CompareTo(ProviderBase other)
+		{
+			return other.ProviderPriority.CompareTo(this.ProviderPriority);
+		}
+		#endregion
+
 		#region 异步编程相关
 		private TaskCompletionSource<object> _taskCompletionSource;
 		protected void InvokeCompletion()

Assets/YooAsset/Runtime/ResourceManager/ResourceManager.cs

@@ -218,7 +218,9 @@ namespace YooAsset
 		}
 
 		/// <summary>
-		/// 加载场景
+		/// 加载场景对象
+		/// 注意：返回的场景句柄是唯一的，每个场景句柄对应自己的场景提供者对象。
+		/// 注意：业务逻辑层应该避免同时加载一个子场景。
 		/// </summary>
 		public SceneHandle LoadSceneAsync(AssetInfo assetInfo, LoadSceneMode sceneMode, bool suspendLoad, uint priority)
 		{
@@ -387,15 +389,24 @@ namespace YooAsset
 			return provider.CreateHandle<RawFileHandle>();
 		}
 
-		internal void UnloadSubScene(ProviderBase provider)
+		internal void UnloadSubScene(string sceneName)
+		{
+			List<string> removeKeys = new List<string>();
+			foreach (var valuePair in _sceneHandles)
+			{
+				var sceneHandle = valuePair.Value;
+				if (sceneHandle.SceneName == sceneName)
 				{
-			string providerGUID = provider.ProviderGUID;
-			if (_sceneHandles.ContainsKey(providerGUID) == false)
-				throw new Exception("Should never get here !");
-
 					// 释放子场景句柄
-			_sceneHandles[providerGUID].ReleaseInternal();
+					sceneHandle.ReleaseInternal();
-			_sceneHandles.Remove(providerGUID);
+					removeKeys.Add(valuePair.Key);
+				}
+			}
+
+			foreach (string key in removeKeys)
+			{
+				_sceneHandles.Remove(key);
+			}
 		}
 		private void UnloadAllScene()
 		{