QT5 UDP通信源码

#include "mainwindow.h" #include "ui_mainwindow.h" #include "QMessageBox" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); udpSocket1=new QUdpSocket(this); udpSocket2=new QUdpSocket(this); hostaddr1 = new QHostAddress("127.0.0.1"); hostaddr2 = new QHostAddress("127.0.0.1"); bool conn=udpSocket1->bind(*hostaddr1,6665,QUdpSocket::ShareAddress);//监听本机上的6666端口，如果有消息到来，就会发送readyRead()信号。 if(!conn){ QMessageBox box; box.setText(tr("连接错误")); box.exec(); }else{ connect(udpSocket1,SIGNAL(readyRead()),this,SLOT(receive())); connect(ui->send,SIGNAL(clicked()),this,SLOT(send())); } } void MainWindow::send() { QMessageBox box; QString text=ui->textSend->toPlainText(); if(text.length()==0){ //box.setText(tr("请输入发送内容")); //box.exec(); } udpSocket2->writeDatagram(text.toUtf8(),text.length(),*hostaddr2,6665);//向IP为192.168.253.188的机器的6665端口发送数据 } void MainWindow::receive() { while(udpSocket1->hasPendingDatagrams()){ QByteArray data; data.resize(udpSocket1->pendingDatagramSize()); udpSocket1->readDatagram(data.data(),data.size()); QString str = data.data(); ui->textReceive->insertPlainText(str+"\n"); } } MainWindow::~MainWindow() { delete ui; }