QT Restart Application

Scenario One: Restart via process

void mainwindow::on_pushbutton_clicked ()
{
    //qapp->quit ();
    Qapp->closeallwindows (); Closing multiple windows is better than calling quit because the window can accept the Close event

    //If it is on an embedded arm board, you need to add-qws parameter
    //qstringlist args;
    Args.append ("-qws");  parameter information
    //args.append ("&");  Background Run
    //qprocess::startdetached (Qapp->applicationfilepath ());//The Path of the program is not a space or Chinese can also be used
    Qprocess::startdetached (Qapp->applicationfilepath (), qstringlist ());
}

Note: because Qapp, need to include header file # include <QApplication> scenario two: Restart via event loop

void mainwindow::on_pushbutton_2_clicked ()
{
    //  773 = ' R ' + ' E ' + ' s ' + ' t ' + ' a ' + ' r ' + ' t '
    /  = = >restart
    //#define Exit_restart  773
    qapp->exit (773);
}

int main (int argc, char *argv[])
{
    qapplication A (argc, argv);

    int ret =-1;
    Do
    {
        MainWindow w;
        W.show ();

        ret = A.exec ();

    } while (ret! = 0);

    return ret;
}

Note: GIF frame count reason, event cycle restart too fast, recording effect is not obvious, has actually restarted