如何在QMessageBox小部件中居中显示文本和按钮

#include <QApplication>
#include <QMessageBox>
#include <QStyle>

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

    QMessageBox msgBox;
    msgBox.setText("这是一个居中显示文本的消息框");
    msgBox.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
    msgBox.setDefaultButton(QMessageBox::Ok);

    // 设置样式表以居中文本和按钮
    QString styleSheet = 
        "QMessageBox {"
        "    text-align: center;"
        "}"
        "QMessageBox QPushButton {"
        "    min-width: 75px;"
        "}"
        "QMessageBox QAbstractButton {"
        "    margin-left: 10px;"
        "    margin-right: 10px;"
        "}";

    msgBox.setStyleSheet(styleSheet);

    msgBox.exec();

    return app.exec();
}