Qt5开发及实例-CH1003.rar,Qt5客户端的编程udpclient代码

#include "udpclient.h" #include <QMessageBox> #include <QHostAddress> UdpClient::UdpClient(QWidget *parent,Qt::WindowFlags f) : QDialog(parent,f) { setWindowTitle(tr("UDP Client")); //设置窗体的标题 /* 初始化各个控件 */ ReceiveTextEdit = new QTextEdit(this); CloseBtn = new QPushButton(tr("Close"),this); /* 设置布局 */ mainLayout=new QVBoxLayout(this); mainLayout->addWidget(ReceiveTextEdit); mainLayout->addWidget(CloseBtn); connect(CloseBtn,SIGNAL(clicked()),this,SLOT(CloseBtnClicked())); port =5555; //设置UDP的端口号参数，指定在此端口上监听数据 udpSocket = new QUdpSocket(this); //创建一个QUdpSocket connect(udpSocket,SIGNAL(readyRead()),this,SLOT(dataReceived())); //(a) bool result=udpSocket->bind(port); //绑定到指定的端口上 if(!result) { QMessageBox::information(this,tr("error"),tr("udp socket create error!")); return; } } void UdpClient::CloseBtnClicked() { close(); } void UdpClient::dataReceived() { while(udpSocket->hasPendingDatagrams()) //(a) { QByteArray datagram; datagram.resize(udpSocket->pendingDatagramSize()); udpSocket->readDatagram(datagram.data(),datagram.size()); //(b) QString msg=datagram.data(); ReceiveTextEdit->insertPlainText(msg); //显示数据内容 } } UdpClient::~UdpClient() { }