Qt程序获取扫码枪数据

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QStandardItemModel> #include <QStatusBar> #include <QMessageBox> #include <QDebug> enum ModbusConnection { Serial, Tcp }; MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); m_serialPort=new QSerialPort(this); ui->lineEdit->setEnabled(false); } MainWindow::~MainWindow() { delete ui; } void MainWindow::keyPressEvent(QKeyEvent *keyValue) { if(keyValue->key() == Qt::Key_Return){//enter curStr = ui->lineEdit->text(); ui->lineEdit->setText(curStr); barStr.clear(); }else{ barStr += keyValue->text(); } ui->lineEdit->setText(readDate()); qDebug() << "enter!"; } bool MainWindow::open() { if (m_serialPort->isOpen()) { return true; } m_serialPort->setPortName("COM3"); m_serialPort->setBaudRate(QSerialPort::Baud9600); m_serialPort->setParity(QSerialPort::NoParity); m_serialPort->setDataBits(QSerialPort::Data8); m_serialPort->setStopBits(QSerialPort::OneStop); m_serialPort->setFlowControl(QSerialPort::NoFlowControl); m_serialPort->setReadBufferSize(1024); return m_serialPort->open(QSerialPort::ReadWrite); } QString MainWindow::readDate() { QString buffer=m_serialPort->readAll(); int nb=buffer.indexOf("\r",0); buffer= buffer.mid(0,nb); qDebug()<<buffer; return buffer; } void MainWindow::on_readDateBtn_clicked() { qDebug()<<readDate(); } void MainWindow::on_openPortBtn_clicked() { if(open()) qDebug()<<"true"; else qDebug()<<"false"; }