fix #661

Assets/YooAsset/Runtime/ResourceManager/Operation/Internal/LoadBundleFileOperation.cs

@@ -173,6 +173,13 @@ namespace YooAsset
 
             if (Result != null)
                 Result.UnloadBundleFile();
+
+            if (IsDone == false)
+            {
+                _steps = ESteps.Done;
+                Status = EOperationStatus.Failed;
+                Error = "Bundle loader destroyed !";
+            }
         }
 
         /// <summary>
@@ -256,5 +263,28 @@ namespace YooAsset
                 _removeList.Clear();
             }
         }
+
+        /// <summary>
+        /// 尝试终止加载器
+        /// </summary>
+        public void TryAbortLoader()
+        {
+            if (IsDone == false)
+            {
+                if (_steps == ESteps.CheckConcurrency)
+                {
+                    _steps = ESteps.Done;
+                    Status = EOperationStatus.Failed;
+                    Error = "Abort bundle loader !";
+                }
+
+                if (_steps == ESteps.LoadBundleFile)
+                {
+                    // 注意：终止下载器
+                    if (_loadBundleOp != null)
+                        _loadBundleOp.AbortDownloadFile = true;
+                }
+            }
+        }
     }
 }

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

@@ -23,7 +23,7 @@ namespace YooAsset
             None,
             CheckOptions,
             ReleaseAll,
-            AbortDownload,
+            TryAbortLoader,
             CheckLoading,
             DestroyAll,
             Done,
@@ -78,15 +78,16 @@ namespace YooAsset
                     }
                 }
 
-                _steps = ESteps.AbortDownload;
+                _steps = ESteps.TryAbortLoader;
             }
 
-            if (_steps == ESteps.AbortDownload)
+            if (_steps == ESteps.TryAbortLoader)
             {
-                // 注意：终止所有下载任务
+                // 尝试终止所有加载任务
+                // 注意：正在加载AssetBundle的任务无法终止
                 foreach (var loader in _resManager.LoaderDic.Values)
                 {
-                    loader.AbortOperation();
+                    loader.TryAbortLoader();
                 }
                 _steps = ESteps.CheckLoading;
             }