问视图堆栈还是根据需要生成？

EN

// Stacked widget
QStackedWidget *pStackedWidget = new QStackedWidget();

// Creating widget list
QListWidget *pListWidget = new QListWidget();
connect(pListWidget, &QListWidget::itemSelectionChanged,
    [pStackedWidget, pListWidget]() {
        pStackedWidget->setCurrentIndex(
            pListWidget->currentItem()->data(Qt::UserRole)
        );
    }
);

// Populating widget list with items
QListWidgetItem *pItem = new QListWidgetItem();
pListWidget->addItem(pItem);
pItem->setItemWidget(pItem, pWidget);
pItem->setData(Qt::UserRole, 0 /* widget index on stacked layout */);