1新建一个项目：TCPServer.pro
A 改动TCPServer.pro,注意：假设是想使用网络库。须要加上network
SOURCES+=\ TcpServer.cpp\ TcpClient.cpp
HEADERS+=\ TcpServer.h\ TcpClient.h
QT+=gui widgets network
CONFIG+=C++11 |
B新建例如以下文件，由于要用到网络库，所以加上network
C编写IP选择下拉选，头文件ChooseInterface.h
#ifndefCHOOSEINTERFACE_H #defineCHOOSEINTERFACE_H
#include<QDialog> #include<QComboBox>
classChooseInterface:publicQDialog { Q_OBJECT public: explicitChooseInterface(QWidget*parent= 0); QComboBox*_comboBox; QString_strSelect;
signals:
publicslots: voidslotComboBoxChange(QString); };
#endif//CHOOSEINTERFACE_H |
编写ChooseInterface.cpp
#include"ChooseInterface.h" #include<QNetworkInterface> #include<QVBoxLayout>
ChooseInterface::ChooseInterface(QWidget*parent): QDialog(parent) { /*getallinterface*/ QList<QHostAddress>addrList=QNetworkInterface::allAddresses(); #if0 QList<QNetworkInterface>infList =QNetworkInterface::allInterfaces();
QList<QNetworkAddressEntry>entryList =infList.at(0).addressEntries(); entryList.at(0).broadcast() #endif
//编写一个下拉选 _comboBox=newQComboBox; QVBoxLayout*lay=newQVBoxLayout(this); lay->addWidget(_comboBox);
foreach(QHostAddressaddr,addrList) { //将地址都转换成为ipv4的地址 quint32ipaddr=addr.toIPv4Address(); //去掉0的ip if(ipaddr==0) continue; //在comboBox中加入下拉选 _comboBox->addItem(QHostAddress(ipaddr).toString()); }
//当下拉选发生变化时的操作 connect(_comboBox,SIGNAL(currentIndexChanged(QString)), this,SLOT(slotComboBoxChange(QString))); }
voidChooseInterface::slotComboBoxChange(QStringstr) { this->_strSelect=str; } |
上面的执行结果是：
编写TcpServer.h |
#ifndefTCPSERVER_H #defineTCPSERVER_H
#include<QWidget> #include<QTcpServer> #include<QTcpSocket> #include<QTextBrowser>
classTcpServer:publicQWidget { Q_OBJECT public: explicitTcpServer(QWidget*parent= 0);
QTcpServer*_server; QTcpSocket*_socket;
QTextBrowser*_show;
signals:
publicslots: voidslotNetConnection(); voidslotReadyRead(); };
#endif//TCPSERVER_H |
编写TcpServer.cpp |
#include"TcpServer.h" #include<QHBoxLayout> #include<QNetworkInterface> #include<QMessageBox> #include"ChooseInterface.h"
TcpServer::TcpServer(QWidget*parent): QWidget(parent) { //创建server并监听 _server=newQTcpServer;
ChooseInterfacedlg; dlg.exec();
//消息提示框 QMessageBox::information(NULL,"youselecttheip:",dlg._strSelect);
_server->listen(QHostAddress(dlg._strSelect),9988);
//当有client来连接时，调用slotNetConnection方法 connect(_server,SIGNAL(newConnection()), this,SLOT(slotNetConnection()));
_show=newQTextBrowser; QHBoxLayout*lay=newQHBoxLayout(this); lay->addWidget(_show); }
voidTcpServer::slotNetConnection() { //推断是否有未处理的连接 while(_server->hasPendingConnections()) { //调用nextPeddingConnection去获得连接的socket _socket=_server->nextPendingConnection();
_show->append("Newconnection....");
//为新的socket提供槽函数。来接收数据 connect(_socket,SIGNAL(readyRead()), this,SLOT(slotReadyRead())); } }
voidTcpServer::slotReadyRead() { //接收数据。推断是否有数据，假设有。通过readAll函数获取全部数据 while(_socket->bytesAvailable()>0) { _show->append("Dataarrived....."); QByteArraybuf=_socket->readAll(); _show->append(buf); } } |
编写TcpClient.h |
#ifndefTCPCLIENT_H #defineTCPCLIENT_H
#include<QWidget> #include<QTcpSocket> #include<QLineEdit>
classTcpClient:publicQWidget { Q_OBJECT public: explicitTcpClient(QWidget*parent= 0); QTcpSocket*_socket; QLineEdit*_lineEdit;
signals:
publicslots: voidslotButtonClick(); };
#endif//TCPCLIENT_H |
编写TcpClient.cpp |
#include"TcpClient.h" #include<QHBoxLayout> #include<QPushButton>
TcpClient::TcpClient(QWidget*parent): QWidget(parent) { _socket=newQTcpSocket(this); _socket->connectToHost("127.0.0.1",9988);
_lineEdit=newQLineEdit; QHBoxLayout*lay=newQHBoxLayout(this); lay->addWidget(_lineEdit); QPushButton*button=newQPushButton("Send");
lay->addWidget(button); connect(button,SIGNAL(clicked()),this,SLOT(slotButtonClick()));
connect(_lineEdit,SIGNAL(returnPressed()),this,SLOT(slotButtonClick())); }
voidTcpClient::slotButtonClick() { QStringstrText=_lineEdit->text(); if(strText.isEmpty()) return;
_socket->write(strText.toUtf8()); _lineEdit->clear(); } |
MyWidget.h |
#ifndefMYWIDGET_H #defineMYWIDGET_H
#include<QWidget>
classMyWidget:publicQWidget { Q_OBJECT public: explicitMyWidget(QWidget*parent= 0);
signals:
publicslots:
};
#endif//MYWIDGET_H |
MyWidget.cpp |
#include"MyWidget.h" #include<QApplication> #include"TcpServer.h" #include"TcpClient.h"
MyWidget::MyWidget(QWidget*parent): QWidget(parent) { }
intmain(intargc,char**argv) { QApplicationapp(argc,argv);
TcpServers;s.show(); TcpClientc;c.show();
s.setWindowTitle("server"); c.setWindowTitle("client");
returnapp.exec(); } |
执行结果：
2 编写UDP程序
UDPServer.pro |
QT+=gui widgets network
CONFIG+=C++11
HEADERS+=\ Udp1.h\ Udp2.h\ MyWidget.h
SOURCES+=\ Udp1.cpp\ Udp2.cpp\ MyWidget.cpp |
Udp1.h |
#ifndefUDP1_H #defineUDP1_H
#include<QWidget> #include<QUdpSocket>
classUdp1:publicQWidget { Q_OBJECT public: explicitUdp1(QWidget*parent= 0); QUdpSocket*_udp;
signals:
publicslots: voidslotReadyRead(); };
#endif//UDP1_H |
Udp1.cpp |
#include"udp1.h" #include<QTimer> #include<QDateTime> Udp1::Udp1(QWidget*parent): QWidget(parent) { //创建udpsocket。并连接槽函数，用来接收数据 _udp=newQUdpSocket; _udp->bind(10001); connect(_udp,SIGNAL(readyRead()), this,SLOT(slotReadyRead()));
//使用定时器来定时发送时间戳 QTimer*timer=newQTimer; timer->setInterval(1000); timer->start(); connect(timer,&QTimer::timeout,[&](){ quint64timestamp=QDateTime::currentMSecsSinceEpoch(); QStringstr=QString::number(timestamp); #if0 //普通UDPsocket发送 _udp->writeDatagram(str.toUtf8(),QHostAddress("127.0.0.1"),10002); #else //广播发送，注意：QHostAddress::Broadcast是255.255.255.255,192.168.6.255 // _udp->writeDatagram(str.toUtf8(),QHostAddress::Broadcast,10002);
//multicast,224.0.0.1~224.0.0.255ismulticastaddressofLAN _udp->writeDatagram(str.toUtf8(),QHostAddress("224.0.0.131"),10002); #endif }); }
voidUdp1::slotReadyRead() { while(_udp->hasPendingDatagrams()) { quint32datagramSize=_udp->pendingDatagramSize(); QByteArraybuf(datagramSize,0); _udp->readDatagram(buf.data(),buf.size()); qDebug()<<"Udp1"<<buf; } } |
Udp2.h |
#ifndefUDP2_H #defineUDP2_H
#include<QWidget> #include<QUdpSocket> classUdp2:publicQWidget { Q_OBJECT public: explicitUdp2(QWidget*parent= 0); QUdpSocket*_udp;
signals:
publicslots: voidslotReadyRead();
};
#endif//UDP2_H |
Udp2.cpp |
#include"udp2.h" #include<QTimer> #include<QDateTime>
#include<QLineEdit>
Udp2::Udp2(QWidget*parent): QWidget(parent) { _udp=newQUdpSocket;
//theaddressofbindandmulticastmustbesametpye(IPV4orIPV6) _udp->bind(QHostAddress::AnyIPv4,10002);
//jointhemulticastaddress(224.0.0.131)forrecvmulicastpackage _udp->joinMulticastGroup(QHostAddress("224.0.0.131"));
connect(_udp,SIGNAL(readyRead()), this,SLOT(slotReadyRead()));
QTimer*timer=newQTimer(this); timer->setInterval(1000); timer->start(); connect(timer,&QTimer::timeout,[&](){ quint64timestamp=QDateTime::currentMSecsSinceEpoch(); QStringstr=QString::number(timestamp); _udp->writeDatagram(str.toUtf8(),QHostAddress("127.0.0.1"),10001); }); }
voidUdp2::slotReadyRead() { while(_udp->hasPendingDatagrams()) { quint32datagramSize=_udp->pendingDatagramSize(); QByteArraybuf(datagramSize,0); _udp->readDatagram(buf.data(),buf.size()); qDebug()<<"Udp2"<<buf; } } |
执行结果：
控制台输出结果例如以下：
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