QT 如何使窗体初始最大化

今天我想让一个窗体初始运行最大化，本以为很简单一个问题，花了差不多两个小时才解决，真是痛苦，

问题一但解决，其实非常简单

QT 中有一个

void QWidget::setWindowState ( Qt::WindowStateswindowState )

这样的函数，通过它可以设置窗体的初始状态，Qt::WindowStates 一共有下面几种状态：

Constant	Value	Description
Qt::WindowNoState	0x00000000	The window has no state set (in normal state).
Qt::WindowMinimized	0x00000001	The window is minimized (i.e. iconified).
Qt::WindowMaximized	0x00000002	The window is maximized with a frame around it.
Qt::WindowFullScreen	0x00000004	The window fills the entire screen without any frame around it.
Qt::WindowActive	0x00000008	The window is the active window, i.e. it has keyboard focus.

有了这个就非常easy 了，想让窗体最大化，只需要

setWindowState(Qt::WindowMaximized);