unity 使用NewTonSoft.json实现字典序列化与反序列化代码

可以使用如下代码实现：

using Newtonsoft.Json;
using System.Collections.Generic;

public class MyDictionaryConverter : JsonConverter
{
    public override bool CanConvert(Type objectType)
    {
        return objectType.IsGenericType && objectType.GetGenericTypeDefinition() == typeof(Dictionary<,>);
    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        var dictionary = (IDictionary)value;
        var keyType = dictionary.GetType().GetGenericArguments()[0];
        var valueType = dictionary.GetType().GetGenericArguments()[1];

        writer.WriteStartObject();

        foreach (var key in dictionary.Keys)
        {
            writer.WritePropertyName(JsonConvert.SerializeObject(key));
            serializer.Serialize(writer, dictionary[key]);
        }

        writer.WriteEndObject();
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        var dictionary = (IDictionary)Activator.CreateInstance(objectType);
        var keyType = objectType.GetGenericArguments()[0];
        var valueType = objectType.GetGenericArguments()[1];

        while (reader.Read() && reader.TokenType == JsonToken.PropertyName)
        {
            var propertyName = JsonConvert.DeserializeObject(reader.Value.ToString(), keyType);
            var value = serializer.Deserialize(reader, valueType);
            dictionary.Add(propertyName, value);
        }

        return dictionary;
    }
}

使用方法如下：

// 序列化
Dictionary<string, object> dic = new Dictionary<string, object>();
string json = JsonConvert.SerializeObject(dic, new MyDictionaryConverter());

// 反序列化
Dictionary<string, object> result = JsonConvert.DeserializeObject<Dictionary<string, object>>(json, new MyDictionaryConverter());

需要注意的是，需要在属性上添加 `[JsonConverter(typeof(MyDictionaryConverter))]` 特性来告诉 `Newtonsoft.Json` 使用上述自定义的 `MyDictionaryConverter` 来进行序列化和反序列化。