NSClassFromString equivalent for BlackBerry-10

Question

Does NSClassFromString from iOS have an equivalent in the BlackBerry 10 SDK?

Answer 1

Yes, there is an equivalent to NSClassFromString provided you use the Qt meta type system.

You'll need to use to Q_DECLARE_METATYPE macro and qRegisterMetaType:

class UserClass : public Superclass {
    ...
}

Q_DECLARE_METATYPE(UserClass)


int main(int argc, char *argv[]) {
    qRegisterMetaType<UserClass>("UserClass");

    ....
}

Then you can create an instance of your class with the following code:

int id = QMetaType::type("UserClass");
UserClass *instance = (UserClass*)(QMetaType::construct(id));

I guess this approach to create objects is used by QML as well, e.g. in the attachedObjects section.