qt设置窗口在桌面居中显示

#include <QApplication>

#include <QMainWindow>

#include <QDesktopWidget>

int main(int argc, char *argv[])

{

QApplication app(argc, argv);

QMainWindow *win = new QMainWindow;

QDesktopWidget *desk = QApplication::desktop();

QRect deskRect = desk->availableGeometry();

// 显示窗口

win->show();

// 移动窗口

win->move((deskRect.width()-win->width())/2, (deskRect.height()-win->height())/2);

return app.exec();

}