update file system

Assets/YooAsset/Runtime/FileSystem/Operation/FSDownloadFileOperation.cs

@@ -34,11 +34,19 @@ namespace YooAsset
             DownloadedBytes = 0;
             DownloadProgress = 0;
         }
-        public void Release()
+
+        /// <summary>
+        /// 减少引用计数
+        /// </summary>
+        public virtual void Release()
         {
             RefCount--;
         }
-        public void Reference()
+
+        /// <summary>
+        /// 增加引用计数
+        /// </summary>
+        public virtual void Reference()
         {
             RefCount++;
         }

Assets/YooAsset/Runtime/FileSystem/Operation/Internal/DownloadAssetBundleOperation.cs

@@ -1,5 +1,4 @@
 using UnityEngine;
-using UnityEngine.Networking;
 
 namespace YooAsset
 {

Assets/YooAsset/Runtime/FileSystem/Operation/Internal/DownloadFileWrapper.cs

@@ -0,0 +1,71 @@
+
+namespace YooAsset
+{
+    internal class DownloadFileWrapper : FSDownloadFileOperation
+    {
+        private enum ESteps
+        {
+            None,
+            Download,
+            Done,
+        }
+
+        private readonly FSDownloadFileOperation _downloadFileOp;
+        private ESteps _steps = ESteps.None;
+
+        internal DownloadFileWrapper(FSDownloadFileOperation downloadFileOp) : base(downloadFileOp.Bundle)
+        {
+            _downloadFileOp = downloadFileOp;
+        }
+        internal override void InternalStart()
+        {
+            _steps = ESteps.Download;
+        }
+        internal override void InternalUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            if (_steps == ESteps.Download)
+            {
+                if (IsWaitForAsyncComplete)
+                    _downloadFileOp.WaitForAsyncComplete();
+
+                if (_downloadFileOp.Status == EOperationStatus.None)
+                    return;
+
+                _downloadFileOp.UpdateOperation();
+                Progress = _downloadFileOp.Progress;
+                DownloadedBytes = _downloadFileOp.DownloadedBytes;
+                DownloadProgress = _downloadFileOp.DownloadProgress;
+                if (_downloadFileOp.IsDone == false)
+                    return;
+
+                _steps = ESteps.Done;
+                Status = _downloadFileOp.Status;
+                Error = _downloadFileOp.Error;
+                HttpCode = _downloadFileOp.HttpCode;
+            }
+        }
+        internal override void InternalWaitForAsyncComplete()
+        {
+            while (true)
+            {
+                if (ExecuteWhileDone())
+                {
+                    _steps = ESteps.Done;
+                    break;
+                }
+            }
+        }
+
+        public override void Release()
+        {
+            _downloadFileOp.Release();
+        }
+        public override void Reference()
+        {
+            _downloadFileOp.Reference();
+        }
+    }
+}

Assets/YooAsset/Runtime/FileSystem/Operation/Internal/DownloadFileWrapper.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 8088863fc7dfbd441bc897380cd7b97f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: