在Unity中使用JsonUtility将带有自定义子对象的类打印到JSON输出中

Question

我一直在尝试将JSON对象及其内部的另一个对象以及本机c＃变量打印到嵌套的json对象中。如果没有自定义对象，则该对象可以很好地打印，但是，一旦添加了自定义对象，则仅打印内部对象的InstanceID。这是代码，我试图找到一种解决方案，但是我没有看到类似的问题。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Character : MonoBehaviour
{
    public string name, char_class, race, alignment;
    public int hp, xp, armor, speed;
    public List<string> itemList = new List<string>();
    public Abilities abilities;

    public string SaveToString()
    {
        return JsonUtility.ToJson(this);
    }
}

public class Abilities : MonoBehaviour
{
    public int strength, dexterity, intelligence, constitution, wisdom, charisma;
}

输出为：

{"name":"test","char_class":"Barbarian","race":"Dragonborn","alignment":"Lawful Good","hp":0,"xp":12,"armor":1,"speed":123,"itemList":[],"abilities":{"instanceID":0}}

但是我试图让它在其他json打印输出中具有abilities对象的详细JSON JSON选项卡。