QT通过TCP协议传输文件

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QMessageBox> #include <QDebug> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); mytimer = new QTimer(this); connect(mytimer,QTimer::timeout,this,&MainWindow::sendData); } MainWindow::~MainWindow() { delete ui; } void MainWindow::on_pushButton_clicked() { QString path = QFileDialog::getOpenFileName(this,tr("open File"),"d:/",tr("Images(*.png *.jpg *.xmp)")); if(!path.isEmpty())file.setFileName(path); if(file.open(QIODevice::ReadOnly)) { QFileInfo info(path); filename = info.fileName(); filesize = info.size(); sendsize = 0; QMessageBox::warning(this,tr("Warning"),tr("文件加载完成")); } } void MainWindow::on_pushButton_2_clicked() { socket = new QTcpSocket(this); socket->connectToHost("127.0.0.1",55249,QIODevice::ReadWrite); if(socket->waitForConnected(1000)) { QMessageBox::warning(this,tr("Warning"),tr("连接成功")); }else{ QMessageBox::warning(this,tr("Warning"),tr("连接出错")); } } void MainWindow::on_pushButton_3_clicked() { QString buf = QString("head#%1#%2").arg(filename).arg(filesize); qint64 len = socket->write(buf.toUtf8().data()); if(len >0) { mytimer->start(1000); }else{ file.close(); } } void MainWindow::sendData() { qint64 len = 0; do{ char buf[2*1024] = {0}; len = file.read(buf,sizeof(buf)); len = socket->write(buf,len); sendsize+=len; qDebug()<<"SendData"; }while(len >0); if(sendsize == filesize) { QMessageBox::warning(this,tr("Warning"),tr("文件发送完毕")); socket->close(); } }