What is the actual function of this BottonRole?

[Gaobo]

I was reading QMessageBox, and I saw that a parameter in the addButton function is BottonRole. What is the actual function of this BottonRole?Please forgive my poor English, I translated through the translation software

[VRonin]

It's described here: https://doc.qt.io/qt-6/qmessagebox.html#ButtonRole-enum
It is used to display the button in the correct place on systems (like MacOS) where position changes depending on the function

[Gaobo]

@VRonin Thanks,

    QMessageBox* box = new QMessageBox(this);
    QPushButton* button1 = new QPushButton("是",this);
    box->addButton(button1, QMessageBox::NoRole);

    QPushButton* button = new QPushButton("否",this);
    box->addButton(button, QMessageBox::YesRole);
    box->show();

I wrote some code and after running it I got the following result

Now I understand what you mean,Thank you!
If my expression offends you, please do not mind. (^ _ ^)