QSettings 读写注册表

参考：QSettings读写注册表、配置文件

不分组

写

// 写注册表
void writeRegistry()
{
// 公司名称
    QCoreApplication::setOrganizationName(QString("Digia"));
// App 名称
    QCoreApplication::setApplicationName(QString("frainSuperApp"));

    QSettings settings(QSettings::NativeFormat, QSettings::UserScope, QCoreApplication::organizationName(), QCoreApplication::applicationName());
// 写入键值对
    settings.setValue("Name", "Qt Creator");
    settings.setValue("Version", 5);
}

效果图

读

// 读注册表
void readRegistry()
{
    QCoreApplication::setOrganizationName(QString("Digia"));
    QCoreApplication::setApplicationName(QString("frainSuperApp"));
    QSettings settings(QSettings::NativeFormat, QSettings::UserScope, QCoreApplication::organizationName(), QCoreApplication::applicationName());

    QString strName = settings.value("Name").toString();
    int nVersion = settings.value("Version").toInt();
}

分组

写

void writeRegistry()
{
    QCoreApplication::setOrganizationName(QString("Digia"));
    QCoreApplication::setApplicationName(QString("frainSuperApp"));

    QSettings settings(QSettings::NativeFormat, QSettings::UserScope, QCoreApplication::organizationName(), QCoreApplication::applicationName());

    settings.beginGroup("Qt6.5");
    settings.setValue("Name", "Qt Creator");
    settings.setValue("Version", "6.5");
    settings.endGroup();

    settings.beginGroup("Qt6.6");
    settings.setValue("Name", "Qt Creator");
    settings.setValue("Version", "6.6");
    settings.endGroup();
}

效果图

读

void readRegistry()
{
    QCoreApplication::setOrganizationName(QString("Digia"));
    QCoreApplication::setApplicationName(QString("frainSuperApp"));
    QSettings settings(QSettings::NativeFormat, QSettings::UserScope, QCoreApplication::organizationName(), QCoreApplication::applicationName());

    settings.beginGroup("Qt6.5");
    QString strName = settings.value("Name").toString();
    QString nVersion = settings.value("Version").toString();
    settings.endGroup();

    settings.beginGroup("Qt6.6");
    strName = settings.value("Name").toString();
    nVersion = settings.value("Version").toString();
    settings.endGroup();
}