QT读取二进制文件

void MainWindow::ReadPicture(){    QByteArray m_data;    QFile file("H:/BaiduYunDownload/Cache/test.jpg");    if(file.open(QIODevice::ReadOnly))    {        m_data = file.readAll();        cout<<m_data.count();        file.close();    }    QFile m_save("test1.jpg");    if(m_save.open(QIODevice::WriteOnly))    {        m_save.write(m_data);        m_save.flush();        m_save.close();    }}