QT写的启动画面（两种形式）

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    /**QSplashScreen *splash = new QSplashScreen;
    splash->setPixmap(QPixmap("/root/images/splash .jpg"));
       splash->show();
       splash->showMessage("starting ");
        sleep(3);
    MainWindow w;
    w.show ();
    splash->finish(&w);
    delete splash;*/

   QPixmap pixmap("/root/images/splash .jpg");

   QSplashScreen splash(pixmap);

    splash.show();
    splash.showMessage("starting.....");
    sleep(3);
    //app.processEvents();

    MainWindow window;
    window.show();
    splash.finish(&window);



    return app.exec();
}