QT 界面居中顯示

#include <QDesktopWidget>

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