今天聊一下Jtro的源码分享：客户端通过服务器同步位置消息

public void HandleMsg(Conn conn, string str)
    {
        byte[] bytes = System.Text.Encoding.Default.GetBytes(str);
        //广播消息
        for(int i=0;i < conns.Length; i++)
        {
            if(conns[i] == null) continue;
            if(!conns[i].isUse)  continue;
            Console.WriteLine("将消息转播给 " + conns[i].GetAdress());
            conns[i].socket.Send(bytes);
        }
    }

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//初创日期  ：2017.12.02
//脚本功能  ：客户端类，存放所有玩家信息。msgList是消息列表，收到服务器消息之后客户端会将消息保存在msgList中，等到Update逐一处理
//            处理添加玩家，发送协议和移动玩家的方法
//脚本挂载在：     
//作者：Jtro
//第一次修改：
/*
*/
using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using UnityEngine.UI;

public class MOVE : MonoBehaviour
{
    //socket和缓冲区
    Socket socket;
    const int BUFFER_SIZE = 1024;
    public byte[] readBuff = new byte[BUFFER_SIZE];
    //玩家列表
    Dictionary<string, GameObject> players = new Dictionary<string, GameObject>();
    //消息列表
    List<string> msgList = new List<string>();
    //Player预设
    public GameObject prefab;
    //自己的IP和端口
    string id;

    //添加玩家
    void AddPlayer(string id, Vector3 pos)
    {
        GameObject player = (GameObject)Instantiate(prefab, pos, Quaternion.identity);
        TextMesh textMesh = player.GetComponentInChildren<TextMesh>();
        textMesh.text = id;
        players.Add(id, player);
    }

    //发送位置协议
    void SendPos()
    {
        GameObject player = players[id];
        Vector3 pos = player.transform.position;
        //组装协议
        string str = "POS ";
        str += id + " ";
        str += pos.x.ToString() + " ";
        str += pos.y.ToString() + " ";
        str += pos.z.ToString() + " ";

        byte[] bytes = System.Text.Encoding.Default.GetBytes(str);
        socket.Send(bytes);
        Debug.Log("发送 " + str);
    }

    //发送离开协议
    void SendLeave()
    {
        //组装协议
        string str = "LEAVE ";
        str += id + " ";
        byte[] bytes = System.Text.Encoding.Default.GetBytes(str);
        socket.Send(bytes);
        Debug.Log("发送 " + str);
    }

    //移动
    void Move()
    {
        if (id == "")
            return;

        GameObject player = players[id];
        //上
        if (Input.GetKey(KeyCode.UpArrow))
        {
            player.transform.position += new Vector3(0, 0, 1);
            SendPos();
        }
        //下
        else if (Input.GetKey(KeyCode.DownArrow))
        {
            player.transform.position += new Vector3(0, 0, -1); ;
            SendPos();
        }
        //左
        else if (Input.GetKey(KeyCode.LeftArrow))
        {
            player.transform.position += new Vector3(-1, 0, 0);
            SendPos();
        }
        //右
        else if (Input.GetKey(KeyCode.RightArrow))
        {
            player.transform.position += new Vector3(1, 0, 0);
            SendPos();
        }
    }

    //离开
    void OnDestory()
    {
        SendLeave();
    }

    //开始
    void Start()
    {
        Connect();
        //请求其他玩家列表，略
        //把自己放在一个随机位置
        UnityEngine.Random.seed = (int)DateTime.Now.Ticks;
        float x = 100 + UnityEngine.Random.Range(-30, 30);
        float y = 0;
        float z = 100 + UnityEngine.Random.Range(-30, 30);
        Vector3 pos = new Vector3(x, y, z);
        AddPlayer(id, pos);
        //同步
        SendPos();
    }

    //链接
    void Connect()
    {
        //Socket
        socket = new Socket(AddressFamily.InterNetwork,
                                 SocketType.Stream, ProtocolType.Tcp);
        //Connect
        socket.Connect("127.0.0.1", 1234);
        id = socket.LocalEndPoint.ToString();
        //Recv
        socket.BeginReceive(readBuff, 0, BUFFER_SIZE, SocketFlags.None, ReceiveCb, null);
    }

    //接收回调
    private void ReceiveCb(IAsyncResult ar)
    {
        try
        {
            int count = socket.EndReceive(ar);
            //数据处理
            string str = System.Text.Encoding.UTF8.GetString(readBuff, 0, count);
            msgList.Add(str);
            //继续接收  
            socket.BeginReceive(readBuff, 0, BUFFER_SIZE, SocketFlags.None, ReceiveCb, null);
        }
        catch (Exception e)
        {
            socket.Close();
        }
    }

    void Update()
    {
        //处理消息列表
        for (int i = 0; i < msgList.Count; i++)
            HandleMsg();
        //移动
        Move();
    }

    //处理消息列表
    void HandleMsg()
    {
        //获取一条消息
        if (msgList.Count <= 0)
            return;
        string str = msgList[0];
        msgList.RemoveAt(0);
        //根据协议做不同的消息处理
        string[] args = str.Split(' ');
        if (args[0] == "POS")
        {
            OnRecvPos(args[1], args[2], args[3], args[4]);
        }
        else if (args[0] == "LEAVE")
        {
            OnRecvLeave(args[1]);
        }
    }

    //处理更新位置的协议
    public void OnRecvPos(string id, string xStr, string yStr, string zStr)
    {
        //不更新自己的位置
        if (id == this.id)
            return;
        //解析协议
        float x = float.Parse(xStr);
        float y = float.Parse(yStr);
        float z = float.Parse(zStr);
        Vector3 pos = new Vector3(x, y, z);
        //已经初始化该玩家
        if (players.ContainsKey(id))
        {
            players[id].transform.position = pos;
        }
        //尚未初始化该玩家
        else
        {
            AddPlayer(id, pos);
        }
    }

    //处理玩家离开的协议
    public void OnRecvLeave(string id)
    {
        if (players.ContainsKey(id))
        {
            Destroy(players[id]);
            players[id] = null;
        }
    }
}

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