How to save QVector<QString> to QSettings

[erytcg]

Hello I use this code to save QVector in QSettings but the program stops working

void MainWindow::on_saveEquations_clicked()
{
    qRegisterMetaTypeStreamOperators<QVector<QString>>("QVector<QString>");
    QSettings settingA("test","equations");
    settingA.beginGroup("MainWindowA");
    settingA.setValue("equa",QVariant::fromValue(expressions));
    settingA.endGroup();
}

void MainWindow::on_loadEquations_clicked()
{
    QSettings settingA("test","equations");
    settingA.beginGroup("MainWindowA");
    expressions=settingA.value("equa").value<QVector<QString>>();
    settingA.endGroup();
}

QVariant::save: unable to save type 'QVector<QString>' (type id: 1032).
solved:
qRegisterMetaTypeStreamOperators<QVector<QString>>("QVector<QString>");
to constructor