#include <QApplication>
#include <QWidget>
#include <QPushButton>
#include <QStackedLayout>
int main(int argc, char *argv[]) {
QApplication app(argc, argv);
QWidget *widget = new QWidget();
QStackedLayout *layout = new QStackedLayout(widget);
QPushButton *button1 = new QPushButton("Page 1");
QPushButton *button2 = new QPushButton("Page 2");
QPushButton *button3 = new QPushButton("Page 3");
layout->addWidget(button1);
layout->addWidget(button2);
layout->addWidget(button3);
layout->setCurrentIndex(1); // 初始显示第二个窗口部件
widget->setLayout(layout);
widget->show();
return app.exec();
}
