Unity反序列化为脚本对象 [英] Unity Deserialize Into Scriptable Object

问题描述

有人知道为什么下面的代码将返回错误

Does anyone know why this code below will return the error

ArgumentException: Cannot deserialize JSON to new instances of type 'CatalogueList.'
UnityEngine.JsonUtility.FromJson[CatalogueList]

我的目录列表存在于我的资产中，我可以很好地序列化并上传到我的服务器，我试图下载我的文件并用json填写所有字段.

My Catalogue list lives in my assets and i can serialize and upload to my server perfectly fine, im trying to download my file and fill in all fields with the json.

这是代码.

void AddDownloadedItems(string text, CatalogueList list)
{
    CatalogueList inventoryItemList = UnityEditor.AssetDatabase.LoadAssetAtPath("Assets/CatalogueItem.asset", typeof(CatalogueList)) as CatalogueList;
    list = JsonUtility.FromJson<CatalogueList>(text);
}

但是正如我说的那样，它只会返回错误?

But as i say it will just return the error?

CatalogueItemList代码

CatalogueItemList Code

public class CatalogueList : ScriptableObject { 
    public List<CatalogueItem> itemList;
}

目录项目代码

[System.Serializable]                                                           //  Our Representation of an InventoryItem
public class CatalogueItem
{
    public string databaseID;
    public string itemName = "New Item";
    public enum PrizeMachine { Bronze, Silver, Gold, Platinum };
    public PrizeMachine myMachine;                     
    public Texture2D itemThumb = null;
    public Texture2D itemIcon = null;
    public string itemThumbName;
    public string itemIconName;
    public string shortDescripion;
    public string fullDescription;                                 
    public int priceInBronze;
    public int priceInSilver;
    public int priceInGold;
    public int priceInPlatinum;
}

推荐答案

请改用ToJsonOverwrite！

请注意，JSON序列化器API支持MonoBehaviour和ScriptableObject子类以及普通结构/类.但是，在将JSON反序列化为MonoBehaviour或ScriptableObject的子类时，必须使用FromJsonOverwrite;不支持FromJson，它将引发异常.

Note that the JSON Serializer API supports MonoBehaviour and ScriptableObject subclasses as well as plain structs/classes. However, when deserializing JSON into subclasses of MonoBehaviour or ScriptableObject, you must use FromJsonOverwrite; FromJson is not supported and will throw an exception.

https://docs.unity3d.com/Manual/JSONSerialization.html

那么对你来说

JsonUtility.FromJsonOverwrite(text, list);

请注意，这不是一成不变的方法，它会覆盖您的对象，但无论如何似乎都是您的意图.

Note that this is not an immutable method and will overwrite your object, but it seems like that was your intention anyway.

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