#include <QDesktopWidget>
QDesktopWidget *pDeskWdg = QApplication::desktop();
QRect rctAvaild = pDeskWdg->availableGeometry();
this->move((rctAvaild.width() - this->width()) / 2, (rctAvaild.height() - this->height()) / 2);
this->show();
#include <QDesktopWidget>
QDesktopWidget *pDeskWdg = QApplication::desktop();
QRect rctAvaild = pDeskWdg->availableGeometry();
this->move((rctAvaild.width() - this->width()) / 2, (rctAvaild.height() - this->height()) / 2);
this->show();