gist

gistfile1.txt

 ui->setupUi(this);
    QDesktopWidget *desktop = QApplication::desktop();
    QRect screen = desktop->screenGeometry();
    int screenWidth = screen.width();
    int screenHeight = screen.height();
    this->setFixedSize(screenWidth, screenHeight);
    QRect r = ui->label->geometry();
    r.setWidth(screenWidth);
    r.setCoords(0,screenHeight/2, screenWidth, screenHeight/2+20);
//    r.adjust(0,screenHeight/2, screenWidth, screenHeight/2+20);
    ui->label->setGeometry(r);

    ui->label->setText("你好，请刷身份证进行登录");