问题
I cant really figure out why do I need it, Been reading: http://doc.qt.io/qt-4.8/properties.html#requirements-for-declaring-properties
still cant really understand the use of it. any kind of help would be great!
回答1:
Read about the Qt Property System , this is just like a usual class method but it can be used with Qt's meta-object system:
QPushButton *button = new QPushButton;
QObject *object = button;
button->setDown(true);
object->setProperty("down", true);
Also these properties will be visible under Qt Designer too so you could create a custom widget with some properties and hook it up in Qt Designer, see this article for details.
回答2:
Properties help in RTTI like implementation using Qt's Meta object system.
来源：https://stackoverflow.com/questions/4722279/q-property-in-qt