有这个类。
书上大致就是这么一个过程
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QSplashScreen *splash = new QSplashScreen;
splash->setPixmap(QPixmap(":/images/splash.png"));
splash->show();
Qt::Alignment topRight = Qt::AlignRight | Qt::AlignTop;
splash->showMessage(QObject::tr("Setting up the main window..."),
topRight, Qt::white);
MainWindow mainWin;
splash->showMessage(QObject::tr("Loading modules..."),
topRight, Qt::white);
loadModules();
splash->showMessage(QObject::tr("Establishing connections..."),
topRight, Qt::white);
establishConnections();
mainWin.show();
splash->finish(&mainWin);
delete splash;
return app.exec();
}