qt和服务器收发信息,QT TCP通信收发数据(示例代码)

亦凉 2022-09-04 06:54 174阅读 0赞

首先在工程文件.pro中加入

QT       += network

需要加的头文件

\#include

服务端

1.创建初始化对象

mServer = new QTcpServer();

mSocket = new QTcpSocket();

2.关联客户端

connect(mServer,SIGNAL(newConnection()),this,SLOT(new\_client()));

3.启动监听服务

mServer->listen(QHostAddress::Any,1122);

4.接受数据

mSocket = mServer->nextPendingConnection();//与客户端通信的套接字

connect(mSocket,SIGNAL(readyRead()),this,SLOT(read\_client\_data()));

5.发送数据

mSocket->write((char\*)msg,5);

实现代码

tcpServer::tcpServer(QWidget \*parent) :

QDialog(parent),

ui(new Ui::tcpServer)

ui->setupUi(this);

mServer = new QTcpServer();

//关联客户端连接信号newConnection

connect(mServer,SIGNAL(newConnection()),this,SLOT(new\_client())); //连接客户端

//启动服务器监听

mServer->listen(QHostAddress::Any,1122);

tcpServer::~tcpServer()

delete ui;

void tcpServer::new\_client()

mSocket = mServer->nextPendingConnection();//与客户端通信的套接字

//关联接收客户端数据信号readyRead信号(客户端有数据就会发readyRead信号)

connect(mSocket,SIGNAL(readyRead()),this,SLOT(read\_client\_data()));

void tcpServer::read\_client\_data()

//可以实现同时读取多个客户端发送过来的消息

QTcpSocket \*obj = (QTcpSocket\*)sender();

QByteArray msg = obj->readAll();

unsigned short size = msg.size();

unsigned char msg1\[10\] = \{0\};

memcpy(msg1, msg.data(), size);

qDebug()<

void tcpServer::on\_pushButton\_clicked()

unsigned char msg\[10\];

msg\[0\]=‘\*‘;

msg\[1\]=10;

msg\[2\]=30;

msg\[4\]=1;

mSocket->write((char\*)msg,5);

客户端

1.创建初始化

mSocket = new QTcpSocket();

2.连接服务器，设置IP和端口

mSocket->connectToHost(QHostAddress::LocalHost,1122);

3.接收数据

connect(mSocket,SIGNAL(readyRead()),this,SLOT(read\_data()));

QByteArray msg = mSocket->readAll();

4.发送数据

mSocket->write((char\*)msg,5);

实现代码

tcpClick::tcpClick(QWidget \*parent) :

QWidget(parent),

ui(new Ui::tcpClick)

ui->setupUi(this);

mSocket = new QTcpSocket();

//关联数据信号

connect(mSocket,SIGNAL(readyRead()),this,SLOT(read\_data()));

//连接服务器，设置ip和端口号

mSocket->connectToHost(QHostAddress::LocalHost,9988);

tcpClick::~tcpClick()

delete ui;

void tcpClick::read\_data()

QByteArray msg = mSocket->readAll();

unsigned short size = msg.size();

unsigned char msg1\[10\] = \{0\};

memcpy(msg1, msg.data(), size);

qDebug()<

void tcpClick::on\_pushButton\_clicked()

unsigned char msg\[10\];

msg\[0\]=‘\*‘;

msg\[1\]=30;

msg\[2\]=20;

msg\[4\]=11;

mSocket->write((char\*)msg,5);

qt和服务器收发信息,QT TCP通信收发数据(示例代码)

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