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服务器端代码

#include "mainwindow.h"
#include "ui_mainwindow.h"MainWindow::MainWindow(QWidget *parent): QMainWindow(parent), ui(new Ui::MainWindow)
{ui->setupUi(this);setWindowTitle("服务器");ui->port->setText("8899");m_s=new QTcpServer(this);connect(m_s,&QTcpServer::newConnection,this,[=](){m_tcp=m_s->nextPendingConnection();m_status->setPixmap(QPixmap(":/image/2.jpg").scaled(20,20));connect(m_tcp,&QTcpSocket::readyRead,this,[=](){ //检测是否接受数据QByteArray data=m_tcp->readAll();ui->record->append("客户端说:"+data);});connect(m_tcp,&QTcpSocket::disconnected,this,[=](){m_tcp->close();m_tcp->deleteLater();m_status->setPixmap(QPixmap(":/image/1.jpg").scaled(20,20));});});//有客户端连接会发出一个信号m_status=new QLabel();m_status->setPixmap(QPixmap(":/image/1.jpg").scaled(20,20));ui->statusbar->addWidget(new QLabel("连接状态"));ui->statusbar->addWidget(m_status);}MainWindow::~MainWindow()
{delete ui;
}void MainWindow::on_setListen_clicked()
{unsigned short port=ui->port->text().toShort();m_s->listen(QHostAddress::Any,port);ui->setListen->setDisabled(true);
}
void MainWindow::on_sendMessage_clicked()
{QString msg=ui->message->toPlainText();m_tcp->write(msg.toUtf8());ui->record->append("服务器说:"+msg);
}

客户端代码

#include "mainwindow.h"
#include "ui_mainwindow.h"MainWindow::MainWindow(QWidget *parent): QMainWindow(parent), ui(new Ui::MainWindow)
{ui->setupUi(this);ui->disconnect->setDisabled(true);setWindowTitle("客户端");ui->port->setText("8899");ui->ip->setText("127.0.0.1");m_tcp=new QTcpSocket(this);connect(m_tcp,&QTcpSocket::readyRead,this,[=](){ //检测是否接受数据QByteArray data=m_tcp->readAll();ui->record->append("服务器端说:"+data);});connect(m_tcp,&QTcpSocket::disconnected,this,[=](){m_tcp->close();m_tcp->deleteLater();m_status->setPixmap(QPixmap(":/image/1.jpg").scaled(20,20));ui->record->setText("已经断开连接服务器...");ui->connect->setEnabled(true);ui->disconnect->setDisabled(false);});connect(m_tcp,&QTcpSocket::connected,this,[=](){m_status->setPixmap(QPixmap(":/image/2.jpg").scaled(20,20));ui->record->setText("已经成功连接服务器...");ui->connect->setDisabled(true);ui->disconnect->setEnabled(true);});m_status=new QLabel();m_status->setPixmap(QPixmap(":/image/1.jpg").scaled(20,20));ui->statusbar->addWidget(new QLabel("连接状态"));ui->statusbar->addWidget(m_status);}MainWindow::~MainWindow()
{delete ui;
}void MainWindow::on_sendMessage_clicked()
{QString msg=ui->message->toPlainText();m_tcp->write(msg.toUtf8());ui->record->setText("客户端说:"+msg);
}void MainWindow::on_connect_clicked()
{QString ip=ui->ip->text();unsigned short port=ui->port->text().toUShort();m_tcp->connectToHost(QHostAddress(ip),port);
}void MainWindow::on_disconnect_clicked()
{m_tcp->close();ui->connect->setDisabled(false);ui->disconnect->setEnabled(false);
}

运行结果