add:下载资源包中指定地址的资源文件

UnityProject/Assets/TEngine/Runtime/Modules/ResourceModule/ResourceModule.cs

@@ -306,6 +306,27 @@ namespace TEngine
             }
         }
 
+        /// <summary>
+        /// 创建资源下载器，用于下载当前资源版本指定地址的资源文件。
+        /// </summary>
+        /// <param name="location">资源地址</param>
+        /// <param name="packageName">指定资源包的名称。不传使用默认资源包</param>
+        public ResourceDownloaderOperation CreateResourceDownloader(string location, string packageName = "")
+        {
+            if (string.IsNullOrEmpty(packageName))
+            {
+                var package = YooAssets.GetPackage(this.packageName);
+                Downloader = package.CreateResourceDownloader(location, downloadingMaxNum, failedTryAgain);
+                return Downloader;
+            }
+            else
+            {
+                var package = YooAssets.GetPackage(packageName);
+                Downloader = package.CreateResourceDownloader(location, downloadingMaxNum, failedTryAgain);
+                return Downloader;
+            }
+        }
+
         /// <summary>
         /// 清理包裹未使用的缓存文件。
         /// </summary>