在unity中用UDP实现发送消息机制

首先,用Unity新建两个项目,然后一个写Server,另一个写Client。`using UnityEngine;
using System.Collections;
//引入库
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;

public class UdpServer : MonoBehaviour
{
//以下默认都是私有的成员
Socket socket; //目标socket
EndPoint clientEnd; //客户端
IPEndPoint ipEnd; //侦听端口
string recvStr; //接收的字符串
string sendStr; //发送的字符串
byte[] recvData = new byte[1024]; //接收的数据,必须为字节
byte[] sendData = new byte[1024]; //发送的数据,必须为字节
int recvLen; //接收的数据长度
Thread connectThread; //连接线程

//初始化
void InitSocket()
{
    //定义侦听端口,侦听任何IP
    ipEnd = new IPEndPoint(IPAddress.Any, 8001);
    //定义套接字类型,在主线程中定义
    socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
    //服务端需要绑定ip
    socket.Bind(ipEnd);
    //定义客户端
    IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
    clientEnd = (EndPoint)sender;
    print("waiting for UDP dgram");

    //开启一个线程连接,必须的,否则主线程卡死
    connectThread = new Thread(new ThreadStart(SocketReceive));
    connectThread.Start();
}

void SocketSend(string sendStr)
{
    //清空发送缓存
    sendData = new byte[1024];
    //数据类型转换
    sendData = Encoding.ASCII.GetBytes(sendStr);
    //发送给指定客户端
    socket.SendTo(sendData, sendData.Length, SocketFlags.None, clientEnd);
}

//服务器接收
void SocketReceive()
{
    //进入接收循环
    while (true)
    {
        //对data清零
        recvData = new byte[1024];
        //获取客户端,获取客户端数据,用引用给客户端赋值
        recvLen = socket.ReceiveFrom(recvData, ref clientEnd);
        print("message from: " + clientEnd.ToString()); //打印客户端信息
        //输出接收到的数据
        recvStr = Encoding.ASCII.GetString(recvData, 0, recvLen);
        print("我是服务器,接收到客户端的数据"+recvStr);
        //将接收到的数据经过处理再发送出去
        sendStr = "From Server: " + recvStr;
        SocketSend(sendStr);
    }
}

//连接关闭
void SocketQuit()
{
    //关闭线程
    if (connectThread != null)
    {
        connectThread.Interrupt();
        connectThread.Abort();
    }
    //最后关闭socket
    if (socket != null)
        socket.Close();
    print("disconnect");
}

// Use this for initialization
void Start()
{
    InitSocket(); //在这里初始化server
}
void OnApplicationQuit()
{
    SocketQuit();
}

}
`上面代码是Server,然后把它绑定在相机上,

“`
using UnityEngine;
using System.Collections;
//引入库
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;

public class UdpClient : MonoBehaviour
{
string editString = “hello wolrd”; //编辑框文字

//以下默认都是私有的成员
Socket socket; //目标socket
EndPoint serverEnd; //服务端
IPEndPoint ipEnd; //服务端端口
string recvStr; //接收的字符串
string sendStr; //发送的字符串
byte[] recvData = new byte[1024]; //接收的数据,必须为字节
byte[] sendData = new byte[1024]; //发送的数据,必须为字节
int recvLen; //接收的数据长度
Thread connectThread; //连接线程

//初始化
void InitSocket()
{
    //定义连接的服务器ip和端口,可以是本机ip,局域网,互联网
    ipEnd = new IPEndPoint(IPAddress.Parse("192.168.1.110"), 8001);
    //定义套接字类型,在主线程中定义
    socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
    //定义服务端
    IPEndPoint sender = new IPEndPoint(IPAddress.Any, 0);
    serverEnd = (EndPoint)sender;
    print("waiting for sending UDP dgram");

    //建立初始连接,这句非常重要,第一次连接初始化了serverEnd后面才能收到消息
    SocketSend("hello");

    //开启一个线程连接,必须的,否则主线程卡死
    connectThread = new Thread(new ThreadStart(SocketReceive));
    connectThread.Start();
}

void SocketSend(string sendStr)
{
    //清空发送缓存
    sendData = new byte[1024];
    //数据类型转换
    sendData = Encoding.ASCII.GetBytes(sendStr);
    //发送给指定服务端
    socket.SendTo(sendData, sendData.Length, SocketFlags.None, ipEnd);
}

//服务器接收
void SocketReceive()
{
    //进入接收循环
    while (true)
    {
        //对data清零
        recvData = new byte[1024];
        //获取客户端,获取服务端端数据,用引用给服务端赋值,实际上服务端已经定义好并不需要赋值
        recvLen = socket.ReceiveFrom(recvData, ref serverEnd);
        print("message from: " + serverEnd.ToString()); //打印服务端信息
        //输出接收到的数据
        recvStr = Encoding.ASCII.GetString(recvData, 0, recvLen);
        print("我是客户端,接收到服务器的数据"+recvStr);
    }
}

//连接关闭
void SocketQuit()
{
    //关闭线程
    if (connectThread != null)
    {
        connectThread.Interrupt();
        connectThread.Abort();
    }
    //最后关闭socket
    if (socket != null)
        socket.Close();
}

// Use this for initialization
void Start()
{
    InitSocket(); //在这里初始化
}

void OnGUI()
{
    editString = GUI.TextField(new Rect(10, 10, 100, 20), editString);
    if (GUI.Button(new Rect(10, 30, 60, 20), "send"))
        SocketSend(editString);
}

// Update is called once per frame
void Update()
{

}

void OnApplicationQuit()
{
    SocketQuit();
}

}

“`这个是Client的,但是记得修改InitSocket()方法中的ip,改为你自己的Ip。

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