Unity使用litjson存取enum和Vector3Int

关键

调用LitJson自带的RegisterExporter和RegisterImporter进行序列化和反序列化，调用前注册或全局注册到JsonMapper即可

代码：

public static class CustomJsonMapper
    {
        public static void Register()
        {
            // 注册自定义的EnumMapper
            JsonMapper.RegisterExporter<Enum>((obj, writer) => writer.Write(Convert.ToInt32(obj)));

            // 注册自定义的EnumImporter
            JsonMapper.RegisterImporter<int, Enum>((intVal) => (Enum)Enum.ToObject(typeof(Enum), intVal));
            
            // 注册自定义的Vector3IntMapper
            JsonMapper.RegisterExporter<Vector3Int>((obj, writer) =>
            {
                writer.WriteObjectStart();
                writer.WritePropertyName("x");
                writer.Write(obj.x);
                writer.WritePropertyName("y");
                writer.Write(obj.y);
                writer.WritePropertyName("z");