【QT】使用最少代码实现最简单TCP服务器端客户端聊天功能

server.cpp客户端代码实现

#include "server.h"
#include "ui_server.h"

server::server(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::server)
{
    ui->setupUi(this);
　　　　//设置地址和端口号
    ui->sIP->setText("127.0.0.1");
    ui->sPort->setText("9999");

　　　　//建立监听连接
    tcpserver = new QTcpServer(this);
    tcpserver->listen(QHostAddress(ui->sIP->text()),ui->sPort->text().toInt());

　　　　//如果监听收到信息，打印信息
　　　　//建立QTcpSocket信息连接
　　　　//将信息显示在record

    connect(tcpserver,&QTcpServer::newConnection,this,[=](){
        conn = tcpserver->nextPendingConnection();
        ui->record->append("thers's new connection");
        connect(conn,&QTcpSocket::readyRead,this,[=](){
            QByteArray array = conn->readAll();
            ui->record->append(array);
        });
    });

　　　　//点击发送按钮，发送信息
    connect(ui->send,&QPushButton::clicked,this,[=](){
        conn->write(ui->msg->toPlainText().toUtf8().data());
        ui->record->append("Me Say: " + ui->msg->toPlainText());
        ui->msg->clear();
    });

}

server::~server()
{
    delete ui;
}

client.cpp端代码实现

#include "client.h"
#include "ui_client.h"
#include <QHostAddress>

Client::Client(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Client)
{
    ui->setupUi(this);

    ui->sIP->setText("127.0.0.1");
    ui->sPort->setText("9999");

　　　　//建立信息连接
    tcpclient = new QTcpSocket(this);
    tcpclient->connectToHost(QHostAddress(ui->sIP->text()),ui->sPort->text().toInt());

　　　　//收到信息，显示在record
    connect(tcpclient,&QTcpSocket::readyRead,this,[=](){
        QByteArray array = tcpclient->readAll();
        ui->record->append(array);
    });

　　　　//发送信息，显示在record
    connect(ui->send,&QPushButton::clicked,this,[=](){
        tcpclient->write(ui->msg->toPlainText().toUtf8());
        ui->record->append("ME Say: "+ui->msg->toPlainText());
    });
}

Client::~Client()
{
    delete ui;
}