qt udp通信

#include "udptwo.h" #include <QtGui/QMessageBox> udptwo::udptwo(QWidget *parent, Qt::WFlags flags) : QMainWindow(parent, flags) { ui.setupUi(this); m_udpSocket1 = new QUdpSocket(this); m_udpSocket2 = new QUdpSocket(this); m_addr1 = new QHostAddress("127.0.0.1"); m_addr2 = new QHostAddress("127.0.0.1"); bool bConn = m_udpSocket1->bind(*m_addr1, 5556, QUdpSocket::ShareAddress); if(!bConn) { QMessageBox box; box.setText("link error"); box.exec(); } else { connect(m_udpSocket1, SIGNAL(readyRead()), this, SLOT(receive())); } } udptwo::~udptwo() { } void udptwo::on_ptn_send_clicked() { QMessageBox box; QString text= ui.te_send->toPlainText(); if(text.length() == 0) { box.setText(tr("请输入发送内容")); box.exec(); } m_udpSocket2->writeDatagram(text.toUtf8(),text.length(), *m_addr2,5555); } void udptwo::receive() { while(m_udpSocket1->hasPendingDatagrams()) { QByteArray data; data.resize(m_udpSocket1->pendingDatagramSize()); m_udpSocket1->readDatagram(data.data(),data.size()); QString str = data.data(); ui.te_receive->insertPlainText(str+"\n"); } }