1、头文件
#include<QScreen>
2、代码
QScreen *screen = QGuiApplication::primaryScreen (); QRect screenRect = screen->availableVirtualGeometry(); resize(screenRect.width(),screenRect.height());
Qt获取当前屏幕大小
原文：https://www.cnblogs.com/GEEK-ZHAO/p/12370130.html
