当然，请参考下面的示例代码：

#include <QtWidgets>

class CustomStackedWidget : public QStackedWidget
{
public:
    CustomStackedWidget(QWidget* parent = nullptr) : QStackedWidget(parent)
    {
        setStyleSheet("background-color: white;"); // 设置背景颜色为白色，可根据需要进行调整

        currentPageIndex = 0;
        startPos = QPoint();
        offset = 0;
    }

protected:
    void mousePressEvent(QMouseEvent* event) override
    {
        startPos = event->pos();
    }

    void mouseMoveEvent(QMouseEvent* event) override
    {
        if (event->buttons() & Qt::LeftButton)
        {
            int deltaX = event->x() - startPos.x();
            offset = deltaX;

            int nextPageIndex = currentPageIndex + (deltaX > 0 ? -1 : 1);
            if (nextPageIndex >= 0 && nextPageIndex < count())
            {
                QWidget* currentPage = widget(currentPageIndex);
                QWidget* nextPage = widget(nextPageIndex);

                nextPage->move(deltaX, 0);
                currentPage->move(deltaX - width(), 0);
            }
        }
    }

    void mouseReleaseEvent(QMouseEvent*) override
    {
        int threshold = width() / 3; // 移动超过宽度的1/3则切换页面

        if (qAbs(offset) >= threshold)
        {
            int nextPageIndex = currentPageIndex + (offset > 0 ? -1 : 1);
            animateToPage(nextPageIndex);
        }
        else
        {
            animateToPage(currentPageIndex); // 恢复原始位置
        }

        startPos = QPoint();
        offset = 0;
    }

private:
    void animateToPage(int nextPageIndex)
    {
        if (nextPageIndex < 0 || nextPageIndex >= count())
            return;

        QWidget* currentPage = widget(currentPageIndex);
        QWidget* nextPage = widget(nextPageIndex);

        QPropertyAnimation* animation = new QPropertyAnimation(this, "geometry");
        animation->setDuration(300); // 动画持续时间，可根据需要进行调整
        animation->setEasingCurve(QEasingCurve::OutQuad); // 缓动曲线，可根据需要进行调整
        animation->setStartValue(geometry());
        
        QRect targetRect = geometry();
        targetRect.moveLeft(-width()); // 下一页的位置在左侧（当前页的前面）
        animation->setEndValue(targetRect);

        connect(animation, &QPropertyAnimation::valueChanged, this, [this](const QVariant& value) {
            int currentValue = value.toInt();
            updatePosition(currentValue);
        });

        connect(animation, &QPropertyAnimation::finished, this, [this, nextPageIndex]() {
            setCurrentIndex(nextPageIndex);
            currentPage->move(0, 0); // 恢复当前页的位置
            delete sender(); // 删除动画对象
        });

        animation->start();
    }

    void updatePosition(int value)
    {
        QWidget* currentPage = widget(currentPageIndex);
        QWidget* nextPage = widget(currentPageIndex + (offset > 0 ? -1 : 1));

        int deltaX = width() + value;
      
      /* 如果你希望实现淡入淡出效果，可以使用下面的代码代替上一行代码：
       * float opacityFactor = qAbs((float)value / width());
       * currentPage->setWindowOpacity(1.0 - opacityFactor);
       * nextPage->setWindowOpacity(opacityFactor);
       */
      
        currentPage->move(deltaX, 0);
        nextPage->move(value, 0);
    }

private:
    int currentPageIndex;
    QPoint startPos;
    int offset;
};

int main(int argc, char* argv[])
{
    QApplication app(argc, argv);

    CustomStackedWidget stackedWidget;

    QLabel* label1 = new QLabel("Page 1");
    label1->setAlignment(Qt::AlignCenter);
  
    // 创建其他页面的控件，例如label2、label3等

    stackedWidget.addWidget(label1);
  
  	// 添加其他页面的控件，例如stackedWidget.addWidget(label2)、stackedWidget.addWidget(label3)等

    stackedWidget.show();

    return app.exec();
}

这是一个简单的示例，展示了如何使用QStackedWidget和QPropertyAnimation实现左右滑动效果。你可以根据自己的需求进一步扩展和优化代码。


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