如何正确链接qt对话框？

// MyDialog.h
#include <QDialog>

class MyDialog : public QDialog
{
    Q_OBJECT

public:
    explicit MyDialog(QWidget *parent = nullptr);

signals:
    void dialogAccepted();
    void dialogRejected();

private slots:
    void onAcceptButtonClicked();
    void onCancelButtonClicked();
};

// MyDialog.cpp
#include "MyDialog.h"
#include <QPushButton>

MyDialog::MyDialog(QWidget *parent) : QDialog(parent)
{
    QPushButton *acceptButton = new QPushButton("Accept", this);
    QPushButton *cancelButton = new QPushButton("Cancel", this);

    connect(acceptButton, &QPushButton::clicked, this, &MyDialog::onAcceptButtonClicked);
    connect(cancelButton, &QPushButton::clicked, this, &MyDialog::onCancelButtonClicked);
}

void MyDialog::onAcceptButtonClicked()
{
    // 执行接受操作
    emit dialogAccepted();
    close();
}

void MyDialog::onCancelButtonClicked()
{
    // 执行取消操作
    emit dialogRejected();
    close();
}