QSettings - counting how many times my app has been opened

[vicarod]

How can I make qt counting how many times my app has been opened ? I tried QtSettings but I do not know how to initialize first time the counter so the next time I restart the app, the counter get the value from QSettings, not from initialized value. I tried to do that in the main windows constructor.

[Eeli K]

It's basic usage of QSettings, just give it a default value:

int i = settings.value("counter", 0).toInt();
settings.setValue("counter", ++i);

Actually it's clearly stated in the documentation, and also it's said that if the settings isn't found (hasn't been set previously), it returns a null QVariant which means 0 as an int, so you don't even have to give it the default value.

[vicarod]

Thanks. It works.