考虑实现用C++做服务器，unity做客户端实现TCP网络通信。
以下采用TCP单线程连接。
Qt C++服务端
建立一个Qt的GUI项目，在界面上放一个label显示连接状态，两个button作为指令发送控制。
记得在pro文件中加入network模块
widget.h
#ifndef WIDGET_H#define WIDGET_H#include <QWidget>class QTcpServer;//前向声明class QTcpSocket;namespace Ui {class Widget;}class Widget : public QWidget{Q_OBJECTpublic:explicit Widget(QWidget *parent = 0);~Widget();private:Ui::Widget *ui;private:QString statusText; //状态信息QTcpServer *tcpServer; //服务器QTcpSocket *clientTcpSocket; //客户端socketvoid SocketSend(QString sendStr);private slots:void SocketConnet();void SocketReceive();void on_leftBtn_clicked();void on_rightBtn_clicked();};#endif // WIDGET_Hwidget.cpp
#include <QTcpServer>#include <QTcpSocket>#include <QAbstractSocket>#include <QDebug>#include "widget.h"#include "ui_widget.h"Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget){ui->setupUi(this);//初始化server并监听tcpServer=new QTcpServer(this); //qt自己内存管理if(!tcpServer->listen(QHostAddress::Any,6666)) //监听所有网络地址，端口6666qDebug()<<tcpServer->errorString();statusText=statusText+"wait for connecting…"+"\n";ui->statusLabel->setText(statusText);//绑定信号槽，当有连接时作出反应connect(tcpServer,SIGNAL(newConnection()),this,SLOT(SocketConnet()));}void Widget::SocketConnet(){//获得client socketclientTcpSocket=tcpServer->nextPendingConnection();//绑定信号槽，接收数据，并且当连接关闭是删除连接connect(clientTcpSocket,SIGNAL(readyRead()),this,SLOT(SocketReceive()));connect(clientTcpSocket,SIGNAL(disconnected()),clientTcpSocket,SLOT(deleteLater()));//显示客户端连接信息QString clientIp=clientTcpSocket->peerAddress().toString();QString clientPort=QString::number(clientTcpSocket->peerPort());statusText=statusText+"conneted with "+clientIp+":"+clientPort+"\n";ui->statusLabel->setText(statusText);}void Widget::SocketSend(QString sendStr){clientTcpSocket->write(sendStr.toStdString().c_str());}void Widget::SocketReceive(){//接收数据并显示，字节转换成了字符串QString recvStr=clientTcpSocket->readAll();statusText=statusText+recvStr+"\n";ui->statusLabel->setText(statusText);//经处理后发送回去SocketSend("From server: "+recvStr);}Widget::~Widget(){delete ui;}//发送unity物体左旋消息void Widget::on_leftBtn_clicked(){SocketSend("leftrotate");}//发送unity物体右旋消息void Widget::on_rightBtn_clicked(){SocketSend("rightrotate");}main.cpp未更改就不贴了。
unity C#客户端
建立一个unity场景，拖入一个cube
把tcpsocket连接部分封装成了一个单独的类TcpClientHandler，再加一个脚本TcpTest挂到场景中，在这个脚本中实例化用于连接的TcpClientHandler。
TcpClientHandler.cs
using UnityEngine;using System.Collections;//引入库using System.Net;using System.Net.Sockets;using System.Text;using System.Threading;public class TcpClientHandler:MonoBehaviour{Socket serverSocket; //服务器端socketIPAddress ip; //主机ipIPEndPoint ipEnd;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public void InitSocket(){//定义服务器的IP和端口，端口与服务器对应ip=IPAddress.Parse("127.0.0.1"); //可以是局域网或互联网ip，此处是本机ipEnd=new IPEndPoint(ip,6666); //服务器端口号//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 SocketConnet(){if(serverSocket!=null)serverSocket.Close();//定义套接字类型,必须在子线程中定义serverSocket=new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp);print("ready to connect");//连接serverSocket.Connect(ipEnd);//输出初次连接收到的字符串recvLen=serverSocket.Receive(recvData);recvStr=Encoding.ASCII.GetString(recvData,0,recvLen);print(recvStr);}public 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serverSocket.Send(sendData,sendData.Length,SocketFlags.None);}void SocketReceive(){SocketConnet();//不断接收服务器发来的数据while(true){recvData=new byte[1024];recvLen=serverSocket.Receive(recvData);if(recvLen==0){SocketConnet();continue;}recvStr=Encoding.ASCII.GetString(recvData,0,recvLen);print(recvStr);}}//返回接收到的字符串public string GetRecvStr(){string returnStr;//加锁防止字符串被改lock(this){returnStr=recvStr;}return returnStr;}public void SocketQuit(){//关闭线程if(connectThread!=null){connectThread.Interrupt();connectThread.Abort();}//最后关闭服务器if(serverSocket!=null)serverSocket.Close();print("diconnect");}}TcpTest.cs
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