int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QPixmap pixmap(":/images/splash.JPG");
QSplashScreen splash(pixmap);
QGridLayout *layout = new QGridLayout( &splash );
Qt::Alignment bottommiddle = Qt::AlignCenter | Qt::AlignBottom;
QProgressBar *progressBar= new QProgressBar;
layout->addWidget(progressBar,0,0,bottommiddle );
splash.show();
app.processEvents();
MainWindow *mainwindow = new MainWindow();
mainwindow->show();
splash.finish(mainwindow);
return app.exec();
}
然后在mainwindow.cpp里，mainwindow（）构造函数里调用progressBar->setValue(i);不成功，说progressBar没有调用，我把QProgressBar *progressBar= new QProgressBar;放到主函数外面编程全局变量也不行，这是怎么回事？应该怎么办？
