qobject_cast ( QObject * object )的疑惑

wmllz

MdiChild *mdiChild = qobject_cast<MdiChild *>(window->widget());
我看帮助文档，还是有点不理解只是觉得这个qobject_cast有点向类型转换，求帮助

a408815041

The qobject_cast() function behaves similarly to the standard C++ dynamic_cast()

它的功能跟C++的dynamic_cast()一样。
父类转向子类