如何正确初始化QWizard页面？

#include <QApplication>
#include <QWizard>
#include <QWizardPage>
#include <QLabel>
#include <QVBoxLayout>
#include <QPushButton>

// 自定义页面类
class Page1 : public QWizardPage {
public:
    Page1(QWidget *parent = nullptr) : QWizardPage(parent) {
        setTitle("Page 1");
        QVBoxLayout *layout = new QVBoxLayout(this);
        QLabel *label = new QLabel("This is Page 1", this);
        layout->addWidget(label);
        setLayout(layout);
    }
};

class Page2 : public QWizardPage {
public:
    Page2(QWidget *parent = nullptr) : QWizardPage(parent) {
        setTitle("Page 2");
        QVBoxLayout *layout = new QVBoxLayout(this);
        QLabel *label = new QLabel("This is Page 2", this);
        layout->addWidget(label);
        setLayout(layout);
    }
};

// 自定义向导类
class MyWizard : public QWizard {
public:
    MyWizard(QWidget *parent = nullptr) : QWizard(parent) {
        setWindowTitle("My Wizard");
        addPage(new Page1);
        addPage(new Page2);
    }
};

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

    MyWizard wizard;
    wizard.exec();

    return app.exec();
}