QT 中使用 QUdpSocket 进行通信

QT对socket作了简单的封装,使得在Windows和Linux下都可以用相同的上层代码来写,不需要关心底层的实现.本文示例的是使用UDP协议进行的通信.

运行效果:

核心代码

server:

#include "receiver.h"
#include "ui_receiver.h"
 
#include <QDebug>
 
Receiver::Receiver(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Receiver)
{
    ui->setupUi(this);
 
    sock = new QUdpSocket(this);
    sock->bind(6666);
 
    connect(sock, SIGNAL(readyRead()), this, SLOT(processPendingDatagrams()));
}
 
Receiver::~Receiver()
{
    delete ui;
}
 
void Receiver::processPendingDatagrams()
{
    while (sock->hasPendingDatagrams()){
        QByteArray data;
        data.resize(sock->pendingDatagramSize());
        sock->readDatagram(data.data(), data.size());
        ui->plainTextEdit->appendPlainText(data.data());
    }
}

client:

#include "sender.h"
#include "ui_sender.h"
 
#include <QtNetwork>
 
sender::sender(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::sender)
{
    ui->setupUi(this);
    ui->plainTextEdit->setReadOnly(true);
 
    sock = new QUdpSocket(this);
}
 
sender::~sender()
{
    delete ui;
}
 
void sender::on_pushButton_clicked()
{
    QByteArray data(ui->lineEdit->text().toStdString().c_str());
    sock->writeDatagram(data.data(), data.size(), QHostAddress::LocalHost, 6666);
    ui->plainTextEdit->appendPlainText(data.data());
}

QT 中使用 QUdpSocket 进行通信

核心代码

示例代码打包下载