第一步，定义Socket通讯协议，定义收发消息的方法

/// <summary>
/// Socket协议
/// </summary>
public enum MessageType
{
    /// <summary>
    /// 链接协议
    /// </summary>
    Connect = 0,
    /// <summary>
    /// 游戏逻辑协议
    /// </summary>
    GameLogic = 1,
    /// <summary>
    /// 游戏环境设置协议
    /// </summary>
    GameSetting = 2,
    /// <summary>
    /// 玩家操作协议
    /// </summary>
    Player = 3,

}

/// <summary>
/// 连接Socket协议
/// </summary>
public enum ConnectMessage
{
    /// <summary>
    /// 加入房间
    /// </summary>
    Join = 0,
    /// <summary>
    /// 请求断开连接
    /// </summary>
    Exit = 1,
    /// <summary>
    /// 中途离开游戏
    /// </summary>
    ExitGame = 2,
    /// <summary>
    /// 中途加入游戏
    /// </summary>
    JoinGame = 3,
    /// <summary>
    /// 关闭服务器
    /// </summary>
    Close = 4,
}

/// <summary>
/// 玩家操作Socket协议
/// </summary>
public enum PlayerMessage
{
    /// <summary>
    /// 发送聊天数据
    /// </summary>
    SendChat = 0,
    /// <summary>
    /// 操作移动
    /// </summary>
    Move = 1,
    /// <summary>
    /// 释放技能
    /// </summary>
    Skill = 2,
    /// <summary>
    /// 执行英雄动画
    /// </summary>
    Animator = 3,
    /// <summary>
    /// 同步英雄transform数据
    /// </summary>
    SyncTransform = 4,
    /// <summary>
    /// 击杀判定
    /// </summary>
    KillJudge = 5,
    /// <summary>
    /// 属性变化
    /// </summary>
    AttributeJudge = 6,
    /// <summary>
    /// 属性面板变化
    /// </summary>
    PropertyPanel = 7,
    /// <summary>
    /// 背包内容变化
    /// </summary>
    PackageChange = 8,

}

第二步，定义客户端发送消息的方法：

using System.Net.Sockets;
    
    /// <summary>
    /// 客户端Socket
    /// </summary>
    public Socket clientSocket;

    /// <summary>
    /// 发送一条文字信息给服务器
    /// </summary>
    /// <param name="msg"></param>
    public void PutMessageToQueue(MessageData msgdata)
    {
        //将对象序列化发过去
        byte[] msgBytes = ToolsUtil.StringToByteArray(JsonMapper.ToJson(msgdata));
        if (msgBytes.Length > 2048)
        {
            iDebug.YiYan("数据长度大于2048，请减少数据");
        }
        else
        {
            SendBytesMessageToServer(msgBytes, 0, msgBytes.Length);
        }
    }

    /// <summary>
    /// 发送消息的方法
    /// </summary>
    /// <param name="sendMsgContent">消息内容</param>
    /// <param name="offset">从消息内容第几个开始发送</param>
    /// <param name="size">发送的长度</param>
    public void SendBytesMessageToServer(byte[] sendMsgContent, int offset, int size)
    {
        //  Debug.Log("开始发送！！准备发送长度=" + size);
        if (clientSocket.Connected == true)
        {
            clientSocket.BeginSend(sendMsgContent, offset, size, SocketFlags.None, SendMessageCallback, "");
        }
        else
        {
            EventManager.playerControl_C.ClearData();
        }
    }

第三步，定义客户端接收消息并显示的方法：

    /// <summary>
    /// 接收消息的方法
    /// </summary>
    /// <param name="byteArray"></param>
    /// <param name="offset"></param>
    /// <param name="length"></param>
    public void ReceiveMsgData(byte[] byteArray, int offset, int length)
    {
        string msg = ToolsUtil.ByteArrayToString(byteArray, offset, length);
        //  Debug.Log("收到信息：" + msg);
        if (msg.Length > 0)
        {
            //对信息进行处理
            MessageData data = JsonMapper.ToObject<MessageData>(msg);
            Action_Talk(data);

        }
        else
        {
            Debug.LogError("连接中断……");
            EventManager.playerControl_C.ClearData();
        }

    }

    /// <summary>
    /// 执行对话
    /// </summary>
    /// <param name="value"></param>
    public void Action_Talk(MessageData value)
    {
        PlayerSocketData playerSocketData = JsonMapper.ToObject<PlayerSocketData>(value.socketData);

        if (localMacID == playerSocketData.MacID)
        {
            UIManager.console_C.ReceiveMessage("我：" + value.msg);
        }
        else
        {
            UIManager.console_C.ReceiveMessage(playerSocketData.Name + "说：" + value.msg);
        }

        DataManager.playerData_C.GetData(playerSocketData.UserID).heroAI.heroCanvas.StartTalk(value.msg);

        //发送弹幕
        BulletScreen.Single.PushComments(playerSocketData.Name + "：" + value.msg);
    }

在“执行对话”Action_Talk 方法里，通过socket接收到的消息需要在UI上实时显示即可，这里就不多做赘述啦~~ 感兴趣的小伙伴，可以做成弹幕哦~~

原理很简单，就是以服务器作为中转，看了第一篇socket帧同步的小伙伴很容易实现聊天系统