从QObject中删除动态属性

Question

有没有办法删除分配给QObject所有动态属性？

Answer 1

Try this:

for (auto const &name : object->dynamicPropertyNames())
{
    object->setProperty(name.constData(), {});
}
Q_ASSERT(object->dynamicPropertyNames().empty());

This iterates over all dynamic properties and sets empty QVariant value. If assertion fails than this is a Qt bug since documetation says:

http://doc.qt.io/qt-5/qobject.html#dynamic-properties

From Qt 4.2, dynamic properties can be added to and removed from QObject instances at run-time.

and

Dynamic properties ... can be removed by setting the property value to an invalid QVariant .