1、头文件
#include<QScreen>
2、代码
QScreen *screen = QGuiApplication::primaryScreen (); QRect screenRect = screen->availableVirtualGeometry(); resize(screenRect.width(),screenRect.height());
3、如果想直接初始主窗口最大化
setWindowState(Qt::WindowMaximized);
4、下面这些参数可用设定主窗口初始状态
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. |