[提问]求各位大神帮助 [复制链接]

QString msg = "1234";
   unsigned int fd;
   QFile *myFile = new QFile();
   myFile->setFileName("D:\test\QT-jiemian\123.txt");


    if (myFile->open(fd, QIODevice::ReadOnly | QIODevice::Text))
    {
      
       myFile->reset();
       myFile->atEnd();

         msg = myFile->readAll();
         ui->lineEdit->setText(msg);

         qDebug() << msg;
    }

编译后提示  QFile::at: Cannot set file position 0  输出“”