Game Programming using Qt 5 Beginner's Guide - Second Edition

QSettings

While not strictly a serialization issue, the aspect of storing application settings is closely related to the described subject. A Qt solution for this is the QSettings class. By default, it uses different backends on different platforms, such as system registry on Windows or INI files on Linux. The basic use of QSettings is very easy—you just need to create the object and use setValue() and value() to store and load data from it:

QSettings settings;
settings.setValue("level", 4);
settings.setValue("playerName", "Player1");
// ...
int level = settings.value("level").toInt(); 

The only thing you need to remember is that it operates on QVariant, so the return value needs to be converted to the proper type if needed, like toInt() ...