How to exit app?

[chaochao]

I create a button and connet to slot exitApp;

 QPushButton *exitbutton  = new QPushButton(tr("exit"),menu);
 connect(exitbutton, SIGNAL(clicked(bool)),this,SLOT(exitApp()));

void GameView::exitApp()
{
    qDebug()<<"exitApp";
    QCoreApplication::exit(0);
}

but what is the matter is I must click exitbutton twice,the app can exit;In other words,APP will debug "exitApp" twice;

[Rohith]

@chaochao

May be you can try this...!

qApp->closeAllWindows();

[raven-worx]

@chaochao
have you reimplemented any closeEvent() handlers in your application or smiliar?

[chaochao]

@Rohith it can close current window,but it will display a untitled window. i do not know where the untitled window came from

[chaochao]

@raven-worx yes ,i have reimpemented closeEvent.like this```
void GameView::closeEvent(QCloseEvent *event)
{
if(_isGameStart)
{
int r = QMessageBox::warning(this,tr("Close"),
tr("Score is %1 \n"
"Would you want to close game?").arg(_score->toPlainText().toInt()),
QMessageBox::Ok|QMessageBox::Cancel);
if(r==QMessageBox::Ok)
event->accept();
else
event->ignore();
}
else
event->ignore();
}

but it  belongs to GameView; code in the question is in a dialog.
whole project like this:
class GameView:public QGraphicsView
{
public:
    GameView();
 void initGame();
}
in .cpp:
GameView::GameView()
    :_isGameStart(false),_gameLevel(1)
{ 
    initGame();
}
void GameView::initGame()
{
     QDialog *menu = new QDialog(this);
    QPushButton *exitbutton  = new QPushButton(tr("Exit"),menu);
   connect(exitbutton, SIGNAL(clicked(bool)),this,SLOT(exitApp()));
}

[raven-worx]

@chaochao said:

void GameView::initGame()
{
QDialog *menu = new QDialog(this);
QPushButton *exitbutton = new QPushButton(tr("Exit"),menu);
connect(exitbutton, SIGNAL(clicked(bool)),this,SLOT(exitApp()));
}

this code doesn't make sense.
You are creating a dangling QDialog (window) but never show it.

[chaochao]

@raven-worx i also find it.but how to solve?

[raven-worx]

@chaochao
well when you never show it you can simply remove the code ;)

[chaochao]

@raven-worx remove?