No matching function for call Qfile::QFile(QStringList)

void MainWindow::on_pushButton_clicked()
{
   QStringList txtfileName = QFileDialog::getOpenFileNames(this, tr("Open File"),"C://",tr("Txt files (*.txt)"));
   MainWindow mainwindowobj;
   mainwindowobj.readtxtfile(txtfileName);
   //mytestfunctiontocall();
}
void MainWindow::readtxtfile(QStringList txtfileName)
{
    QFile logfile(loggerfileName);
    if (!logfile.open(QIODevice::ReadOnly | QIODevice::Text))
    {
        qDebug() << "Error msg while opening";
           return;
    }

    QTextStream in(&logfile);
    while (!in.atEnd())
    {
        QString line = in.readLine();
         qDebug() << line;
    }

}

class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    void readtxtfile(QStringList);

    ~MainWindow();

private slots:
    void on_pushButton_clicked();

    void on_pushButton_2_clicked();

private:
    Ui::MainWindow *ui;
};