feat #648

Assets/YooAsset/Runtime/InitializeParameters.cs

@@ -43,6 +43,11 @@ namespace YooAsset
         /// </summary>
         public int BundleLoadingMaxConcurrency = int.MaxValue;
 
+        /// <summary>
+        /// 当资源引用计数为零的时候自动释放资源包
+        /// </summary>
+        public bool AutoUnloadBundleWhenUnused = false;
+
         /// <summary>
         /// WebGL平台强制同步加载资源对象
         /// </summary>

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

@@ -23,6 +23,11 @@ namespace YooAsset
             if (IsValidWithWarning == false)
                 return;
             Provider.ReleaseHandle(this);
+
+            // 主动卸载零引用的资源包
+            if (Provider.RefCount == 0)
+                Provider.TryUnloadBundle();
+
             Provider = null;
         }
 
@@ -146,11 +151,11 @@ namespace YooAsset
         /// </summary>
         public System.Threading.Tasks.Task Task
         {
-            get 
+            get
             {
                 if (IsValidWithWarning == false)
                     return null;
-                return Provider.Task; 
+                return Provider.Task;
             }
         }
 

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

@@ -308,6 +308,17 @@ namespace YooAsset
             }
         }
 
+        /// <summary>
+        /// 尝试卸载资源包
+        /// </summary>
+        public void TryUnloadBundle()
+        {
+            if (_resManager.AutoUnloadBundleWhenUnused)
+            {
+                _resManager.TryUnloadUnusedAsset(MainAssetInfo, 10);
+            }
+        }
+
         /// <summary>
         /// 结束流程
         /// </summary>

Assets/YooAsset/Runtime/ResourceManager/ResourceManager.cs

@@ -17,6 +17,7 @@ namespace YooAsset
         private int _bundleLoadingMaxConcurrency;
 
         // 开发者配置选项
+        public bool AutoUnloadBundleWhenUnused { private set; get; }
         public bool WebGLForceSyncLoadAsset { private set; get; }
         public bool UseWeakReferenceHandle { private set; get; }
 
@@ -47,6 +48,7 @@ namespace YooAsset
         public void Initialize(InitializeParameters parameters, IBundleQuery bundleServices)
         {
             _bundleLoadingMaxConcurrency = parameters.BundleLoadingMaxConcurrency;
+            AutoUnloadBundleWhenUnused = parameters.AutoUnloadBundleWhenUnused;
             WebGLForceSyncLoadAsset = parameters.WebGLForceSyncLoadAsset;
             UseWeakReferenceHandle = parameters.UseWeakReferenceHandle;
             _bundleQuery = bundleServices;