qt 服务器与多个客户端之间的tcp通信

#include "tcpclient.h" #include <QMessageBox> #include <QHostInfo> #include<QDebug> TcpClient::TcpClient(QWidget *parent,Qt::WindowFlags f) : QDialog(parent,f) { setWindowTitle(tr("TCP Client")); contentListWidget = new QListWidget; sendLineEdit = new QLineEdit; sendBtn = new QPushButton(QStringLiteral("发送")); userNameLabel = new QLabel(QStringLiteral("用户名：")); userNameLineEdit = new QLineEdit; serverIPLabel = new QLabel(QStringLiteral("服务器地址：")); serverIPLineEdit = new QLineEdit; portLabel = new QLabel(QStringLiteral("端口：")); portLineEdit = new QLineEdit; enterBtn= new QPushButton(QStringLiteral("进入聊天室")); 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"); // std::string msgstd=msg.toStdString(); // const char *msgtoc=msgstd.c_str(); // if((length=tcpSocket->write(msgtoc,msg.length()))!=msg. length()) // { // return; // } QString msg=userName+QStringLiteral(":Leave Chat Room"); QByteArray datasend =msg.toLocal8Bit(); tcpSocket->write(datasend); tcpSocket->disconnectFromHost(); status=false; } } void TcpClient::slotConnected() { sendBtn->setEnabled(true); enterBtn->setText(QStringLiteral("离开")); QString msg=userName+QStringLiteral(":Enter Chat Room"); QByteArray datasend =msg.toLocal8Bit(); tcpSocket->write(datasend); // qDebug()<<msg; // std::string msgstd=msg.toStdString(); // const char *msgtoc=msgstd.c_str(); // qDebug()<<msgtoc; qDebug()<<"msgtoc"; // //if((length=tcpSocket->write(msg.toLatin1(),msg.length()))!=msg.length()) // if((length=tcpSocket->write(msgtoc,msg.length()))!=msg.length()) // { // return; // } } void TcpClient::slotSend() { if(sendLineEdit->text()=="") { return ; } QString msg=userName+":"+sendLineEdit->text(); QByteArray datasend =msg.toLocal8Bit(); tcpSocket->write(datasend); sendLineEdit->clear(); } void TcpClient::slotDisconnected() { sendBtn->setEnabled(false); enterBtn->setText(QStringLiteral("进入聊天室")); } 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())); // } QByteArray buffer; //读取缓冲区数据 buffer = tcpSocket->readAll(); if(!buffer.isEmpty()) { QString str = QString::fromLocal8Bit(buffer); //刷新显示 contentListWidget->addItem(str); } }