【Unity实战|热更】Addressable读取SO文件报错解决

情景再现

假定你有一个Unity工程，使用了HybridCLR和Addressable，SO文件存放在Addressable中。热更加载后进入游戏场景出现了SO文件读取报错：

UnityEngine.AddressableAssets.InvalidKeyException: Exception of type 'UnityEngine.AddressableAssets.InvalidKeyException' was thrown. No Asset found with for Key=Inventory Model Database. Key exists as Type=System.Object, which is not assignable from the requested Type=InventorySystem.Models.InventoryModelDatabase
UnityEngine.AddressableAssets.Addressables:LoadAssetAsync(Object)

可能原因

读取SO文件时，文件绑定的脚本并没有成功还原出来。见官方文档。

解决办法

加载SO文件的代码时不要声明具体的类型，改用System.Object，成功后进行强转。

Before:

Addressables.LoadAssetAsync<InventoryModelDatabase>("Inventory Model Database").Completed += handle =>
			{
				if (handle.Status == AsyncOperationStatus.Succeeded)
				{
					_inventoryModelDatabase = handle.Result;
					Debug.Log($"[{GetType()}] Inventory Model Database loaded!");
				}
				else
					Debug.LogError($"[{GetType()}] Failed to load Inventory Model Database!");
			};

After:

Addressables.LoadAssetAsync<System.Object>("Inventory Model Database").Completed += handle =>
			{
				if (handle.Status == AsyncOperationStatus.Succeeded)
				{
					_inventoryModelDatabase = handle.Result as InventoryModelDatabase;
					Debug.Log($"[{GetType()}] Inventory Model Database loaded!");
				}
				else
					Debug.LogError($"[{GetType()}] Failed to load Inventory Model Database!");
			};

问题解决。