dialog.h
#ifndef DIALOG_H
#define DIALOG_H
#include <QDialog>
#include <QUdpSocket>
namespace Ui {
class Dialog;
}
class Dialog : public QDialog
{
Q_OBJECT
public:
explicit Dialog(QWidget *parent = 0);
~Dialog();
QUdpSocket *m_udp;
private slots:
void on_pushButton_send_clicked();
void reciveData();
private:
Ui::Dialog *ui;
};
#endif // DIALOG_H
dialog.cpp
#include "dialog.h"
#include "ui_dialog.h"
Dialog::Dialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::Dialog)
{
ui->setupUi(this);
m_udp = new QUdpSocket(this);//创建socket套接字
m_udp->bind(8000);//绑定端口8000
connect(m_udp,SIGNAL(readyRead()),this,SLOT(reciveData()));//建立接收数据的信号槽
}
Dialog::~Dialog()
{
delete ui;
}
void Dialog::on_pushButton_send_clicked()
{
QString msg = ui->lineEdit->text();
if(!msg.isEmpty())
{
m_udp->writeDatagram(msg.toUtf8(),QHostAddress("127.0.0.1"),7000);//发送数据
}
}
void Dialog::reciveData()
{
while (m_udp->hasPendingDatagrams())
{
quint32 size = m_udp->pendingDatagramSize();
QByteArray buf(size,0);//size是buf大小,0是初始化数据
QHostAddress ip;
quint16 port;
m_udp->readDatagram(buf.data(),buf.size(),&ip,&port);//接收数据
ui->textEdit->append("[" + ip.toString() + ":" + QString::number(port) + "] " + buf);
}
}
main.cpp
#include "dialog.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Dialog w;
w.show();
return a.exec();
}
https://www.cnblogs.com/wurenzhong/p/8030220.html