—-想了解QT网络编程Tcp下C/S架构的即时通信实例分享的全部内容且更多的C语言教程关注
先写一个客户端，实现简单的，能加入聊天，以及加入服务器的界面。
#ifndef TCPCLIENT_H #define TCPCLIENT_H #include #include #include #include #include #include #include #include class TcpClient : public QDialog { Q_OBJECT public: TcpClient(QWidget *parent = 0,Qt::WindowFlags f=0); ~TcpClient(); private: QListWidget *contentListWidget; QLineEdit *sendLineEdit; QPushButton *sendBtn; QLabel *userNameLabel; QLineEdit *userNameLineEdit; QLabel *serverIPLabel; QLineEdit *serverIPLineEdit; QLabel *portLabel; QLineEdit *portLineEdit; QPushButton *enterBtn; QGridLayout *mainLayout; bool status; int port; QHostAddress *serverIP; QString userName; QTcpSocket *tcpSocket; public slots: void slotEnter(); void slotConnected(); void slotDisconnected(); void dataReceived(); void slotSend(); }; #endif // TCPCLIENT_H
有一个加入服务器的按钮，还有一个发送消息的按钮，在头文件，先定义两个函数。
#include "tcpclient.h" #include #include TcpClient::TcpClient(QWidget *parent,Qt::WindowFlags f) : QDialog(parent,f) { setWindowTitle(tr("TCP Client")); contentListWidget = new QListWidget; sendLineEdit = new QLineEdit; sendBtn = new QPushButton(tr("send")); userNameLabel = new QLabel(tr("name")); userNameLineEdit = new QLineEdit; serverIPLabel = new QLabel(tr("server")); serverIPLineEdit = new QLineEdit; portLabel = new QLabel(tr("port")); portLineEdit = new QLineEdit; enterBtn= new QPushButton(tr("join chat")); mainLayout = new QGridLayout(this); mainLayout->addWidget(contentListWidget,0,0,1,2); mainLayout->addWidget(sendLineEdit,1,0); mainLayout->addWidget(sendBtn,1,1); mainLayout->addWidget(userNameLabel,2,0); mainLayout->addWidget(userNameLineEdit,2,1); mainLayout->addWidget(serverIPLabel,3,0); mainLayout->addWidget(serverIPLineEdit,3,1); mainLayout->addWidget(portLabel,4,0); mainLayout->addWidget(portLineEdit,4,1); mainLayout->addWidget(enterBtn,5,0,1,2); status = false; port = 8010; portLineEdit->setText(QString::number(port)); serverIP =new QHostAddress(); connect(enterBtn,SIGNAL(clicked()),this,SLOT(slotEnter())); connect(sendBtn,SIGNAL(clicked()),this,SLOT(slotSend())); sendBtn->setEnabled(false); } TcpClient::~TcpClient() { } void TcpClient::slotEnter() { if(!status) { QString ip = serverIPLineEdit->text(); if(!serverIP->setAddress(ip)) { QMessageBox::information(this,tr("error"),tr("server ip address error!")); return; } if(userNameLineEdit->text()=="") { QMessageBox::information(this,tr("error"),tr("User name error!")); return; } userName=userNameLineEdit->text(); tcpSocket = new QTcpSocket(this); connect(tcpSocket,SIGNAL(connected()),this,SLOT(slotConnected())); connect(tcpSocket,SIGNAL(disconnected()),this,SLOT(slotDisconnected())); connect(tcpSocket,SIGNAL(readyRead()),this,SLOT(dataReceived())); tcpSocket->connectToHost(*serverIP,port); status=true; } else { int length=0; QString msg=userName+tr(":Leave Chat Room"); if((length=tcpSocket->write(msg.toLatin1(),msg.length()))!=msg. length()) { return; } tcpSocket->disconnectFromHost(); status=false; } } void TcpClient::slotConnected() { sendBtn->setEnabled(true); enterBtn->setText(tr("离开")); int length=0; QString msg=userName+tr(":Enter Chat Room"); if((length=tcpSocket->write(msg.toLatin1(),msg.length()))!=msg.length()) { return; } } void TcpClient::slotSend() { if(sendLineEdit->text()=="") { return ; } QString msg=userName+":"+sendLineEdit->text(); tcpSocket->write(msg.toLatin1(),msg.length()); sendLineEdit->clear(); } void TcpClient::slotDisconnected() { sendBtn->setEnabled(false); enterBtn->setText(tr("join chat")); } void TcpClient::dataReceived() { while(tcpSocket->bytesAvailable()>0) { QByteArray datagram; datagram.resize(tcpSocket->bytesAvailable()); tcpSocket->read(datagram.data(),datagram.size()); QString msg=datagram.data(); contentListWidget->addItem(msg.left(datagram.size())); } }
实现界面布局。在Enter槽函数中，确定加入还是离开的服务器的功能。如果加入了，就将消息，写到tcpsocket中，构造消。
服务端的头文件：
#ifndef TCPSERVER_H #define TCPSERVER_H #include #include #include #include #include #include #include "server.h" class TcpServer : public QDialog { Q_OBJECT public: TcpServer(QWidget *parent = 0,Qt::WindowFlags f=0); ~TcpServer(); private: QListWidget *ContentListWidget; QLabel *PortLabel; QLineEdit *PortLineEdit; QPushButton *CreateBtn; QGridLayout *mainLayout; int port; Server *server; public slots: void slotCreateServer(); void updateServer(QString,int); }; #endif // TCPSERVER_H
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