QT TcpServer和TcpSokect的通讯示例

#include "mainwidget.h" #include "ui_mainwidget.h" MainWidget::MainWidget(QWidget *parent) : QWidget(parent),ui(new Ui::MainWidget) { ui->setupUi(this); tcpServer = new QTcpServer(this); tcpClient = new QTcpSocket(this); connect(tcpServer,SIGNAL(newConnection()),this,SLOT(newConnection())); connect(tcpClient,SIGNAL(readyRead()),this,SLOT(readyRead())); if(!tcpServer->listen(QHostAddress::Any,6666)){ mDebug("Unable to linsten port 6666"); return; } code = QTextCodec::codecForLocale(); ui->lineEdit->setText("127.0.0.1"); } MainWidget::~MainWidget() { delete ui; delete tcpServer; delete tcpClient; } void MainWidget::newConnection(){ QByteArray block; QDataStream out(&block, QIODevice::WriteOnly); out.setVersion(QDataStream::Qt_5_7); out<<"Mess received"; if(tcpServer->hasPendingConnections()){ clientConnection = tcpServer->nextPendingConnection(); connect(clientConnection,SIGNAL(disconnected()),clientConnection,SLOT(deleteLater())); connect(clientConnection,SIGNAL(readyRead()),this,SLOT(readyRead2())); clientConnection->write(block); //clientConnection->disconnectFromHost(); } } void MainWidget::on_pushButton_clicked() { QByteArray block; QDataStream out(&block, QIODevice::WriteOnly); out.setVersion(QDataStream::Qt_5_7); out<<"test mess"; tcpClient->abort(); QString ip = ui->lineEdit->text(); tcpClient->connectToHost(ip,6666); if(tcpClient->waitForConnected(30000)){ mDebug("Connected "+QString::number(block.length())); tcpClient->write(block); //tcpClient->disconnectFromHost(); } } void MainWidget::readyRead(){ mDebug("readyRead"); QDataStream in(tcpClient); in.setVersion(QDataStream::Qt_5_7); QString data; QByteArray bytes; in.startTransaction(); in>>bytes; data = code->toUnicode(bytes); qDebug()<<in.commitTransaction(); mDebug(data); } void MainWidget::readyRead2(){ mDebug("readyRead2"); QDataStream in(clientConnection); in.setVersion(QDataStream::Qt_5_7); QString data; QByteArray bytes; in.startTransaction(); in>>bytes; data = code->toUnicode(bytes); qDebug()<<in.commitTransaction(); mDebug(data); }