Qt

QT写TXT文件

scorlw 发布于

QT写TXT文件

Qt

代码：

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//头文件
#include <QDir>
#include <QDateTime>
#include <QDebug>

void MainWindow::on_saveBtn_clicked()
{
    //本函数只是单独测试Qt保持为txt文本功能，与本串口程序无任何关系
    QDateTime da_time;
    QString time_str = da_time.currentDateTime().toString("yyyy-MM-dd HH-mm-ss");
//    QString runPath = QCoreApplication::applicationFilePath();
//    QString dirPath = QCoreApplication::applicationDirPath();
//    ui->pathview->setText(runPath); //X:qtworkspace/xxx/xx-desktop-debug/debug/xxx.exe
//    ui->pathview_2->setText(dirPath);//X:qtworkspace/xxx/xx-desktop-debug/debug/
    QDir *DataFile = new QDir;
    bool exist = DataFile->exists("DataFile");
    if(!exist)
    {
        bool isok = DataFile->mkdir("DataFile"); // 新建文件夹
            if(!isok)
                QMessageBox::warning(this,"sdf","can't mkdir",QMessageBox::Yes);
    }
    QString fileName = "DataFile/"+time_str+"datafile.txt";
    QString str = "this is testing for save data to txt file by Qt programming.";
    QFile file(fileName);
    if(!file.open(QIODevice::WriteOnly|QIODevice::Text|QIODevice::Append))
    {
        QMessageBox::warning(this,"sdf","can't open",QMessageBox::Yes);
    }
    QTextStream stream(&file);
    stream<<time_str+":"+str<<"\n";
    file.close();
}

原文地址：https://www.cnblogs.com/AI-Algorithms/p/3744007.html