update extension sample

Assets/YooAsset/Samples~/Extension Sample/Runtime/ExtensionOperation/GetBuildinPackageVersionOperation.cs

@@ -0,0 +1,82 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using YooAsset;
+
+/// <summary>
+/// 获取包体里的内置资源清单版本
+/// </summary>
+public class GetBuildinPackageVersionOperation : GameAsyncOperation
+{
+    private enum ESteps
+    {
+        None,
+        GetPackageVersion,
+        Done,
+    }
+
+    private readonly string _packageName;
+    private UnityWebTextRequestOperation _versionFileRequestOp;
+    private ESteps _steps = ESteps.None;
+
+    /// <summary>
+    /// 内置资源清单版本
+    /// </summary>
+    public string PackageVersion { private set; get; }
+
+    public GetBuildinPackageVersionOperation(string packageName)
+    {
+        _packageName = packageName;
+    }
+    protected override void OnStart()
+    {
+        _steps = ESteps.GetPackageVersion;
+    }
+    protected override void OnUpdate()
+    {
+        if (_steps == ESteps.None || _steps == ESteps.Done)
+            return;
+
+        if (_steps == ESteps.GetPackageVersion)
+        {
+            if (_versionFileRequestOp == null)
+            {
+                string filePath = GetBuildinPackageVersionFilePath();
+                string url = DownloadSystemHelper.ConvertToWWWPath(filePath);
+                _versionFileRequestOp = new UnityWebTextRequestOperation(url);
+                OperationSystem.StartOperation(_packageName, _versionFileRequestOp);
+            }
+
+            if (_versionFileRequestOp.IsDone == false)
+                return;
+
+            if (_versionFileRequestOp.Status == EOperationStatus.Succeed)
+            {
+                _steps = ESteps.Done;
+                Status = EOperationStatus.Succeed;
+                PackageVersion = _versionFileRequestOp.Result;
+            }
+            else
+            {
+                _steps = ESteps.Done;
+                Status = EOperationStatus.Failed;
+                Error = _versionFileRequestOp.Error;
+            }
+        }
+    }
+    protected override void OnAbort()
+    {
+    }
+
+    private string GetBuildinYooRoot()
+    {
+        return YooAssetSettingsData.GetYooDefaultBuildinRoot();
+    }
+    private string GetBuildinPackageVersionFilePath()
+    {
+        string fileRoot = GetBuildinYooRoot();
+        string fileName = YooAssetSettingsData.GetPackageVersionFileName(_packageName);
+        return PathUtility.Combine(fileRoot, _packageName, fileName);
+    }
+}

Assets/YooAsset/Samples~/Extension Sample/Runtime/ExtensionOperation/GetBuildinPackageVersionOperation.cs.meta

@@ -0,0 +1,11 @@
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+guid: 609e1ce54918dab40900d532704b1187
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
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