前言

本来就想从网上找一个Unity的UDP客户端,百度上试了好多教程,问题百出,让人气不打一处来.
就几行代码的事情,浪费时间.

下面贴代码
ip和port改成服务器的
"connect"是连接时给服务器发送的
"HeartBeat"是心跳包

代码

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using System.Text;
using System.Net.Sockets;
using System.Net;

public class Network : MonoBehaviour
{
    public UdpClient udp;
    // Start is called before the first frame update
    void Start()
    {
        udp = new UdpClient();
        
        udp.Connect(ip,port);

        Byte[] sendBytes = Encoding.ASCII.GetBytes("connect");
      
        udp.Send(sendBytes, sendBytes.Length);

        udp.BeginReceive(new AsyncCallback(OnReceived), udp);

        InvokeRepeating("HeartBeat", 1, 1);
    }

    void OnDestroy(){
        udp.Dispose();
    }

    void OnReceived(IAsyncResult result){
        // this is what had been passed into BeginReceive as the second parameter:
        UdpClient socket = result.AsyncState as UdpClient;
        
        // points towards whoever had sent the message:
        IPEndPoint source = new IPEndPoint(0, 0);

        // get the actual message and fill out the source:
        byte[] message = socket.EndReceive(result, ref source);
        
        // do what you'd like with `message` here:
        string returnData = Encoding.ASCII.GetString(message);
        Debug.Log("Got this: " + returnData);

 // schedule the next receive operation once reading is done:
        socket.BeginReceive(new AsyncCallback(OnReceived), socket);

}

	void HeartBeat(){
        Byte[] sendBytes = Encoding.ASCII.GetBytes("heartbeat");
        udp.Send(sendBytes, sendBytes.Length);
    }
}

资源

带UI的源码下载(free)

其他

中文乱码问题

ASCII 改成 UniCode

最后

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