modaless dialog will be hide in main ui in mac os

We want to show a Modaless dialog in main UI. When the main UI first appears, the dialog in on the ui, but we we click the main ui, the dialog will be hided behind of main ui.

This issue happens in mac os , Windows doesn't have this issue.

 

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include <QDialog> 

MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow)

{ ui->setupUi(this); QDialog *dialog = new QDialog(this); dialog->setModal(false); dialog->show(); }

 

MainWindow::~MainWindow(){ delete ui;}