关闭父级以显式调用隐藏或关闭时,Messagebox未关闭

我将QMessageBox作为widget类的成员 如果messagebox保持打开状态,并且通过程序关闭小部件,则messagebox不会关闭。我也为消息框设置了父项

// Code local to a function
reply = m_warningMsg.question(this,"Warning","Do you really want to close the connection",QMessageBox::Yes | QMessageBox::No);
if(reply == QMessageBox::No)
{
    return;
}

//Function to close the widget
void Window::closeConnection()
{
    m_warningMsg.setParent(this);
    m_warningMsg.setVisible(true);

    // Code inside if executed but not hiding messagebox
    if(m_warningMsg.isVisible())
    {
        m_warningMsg.close();
        m_warningMsg.hide();
    }
    close();
}