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Editorial Team
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Asked: 2026-05-27T00:18:02+00:00

I have a main window where I create the objects dynamically, so before making

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I have a main window where I create the objects dynamically, so before making any new screen I have to first delete all the objects from the last screen. I was using this, and it was working great:

qDeleteAll(this->window->findChildren<QWidget*>());

But now I have this screen that has some QGraphicsView and QGraphicsScene, and I made their parent the main window as well, and now I got a crash when I try to delete all the main window’s children.

So my question is basically, how can I avoid this crash? How can I easily and safely delete all my main window’s children including GraphicsScene and GraphicsView?

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1 Answer

  1. Editorial Team

    I suspect that your crash is being caused by a double delete.

    QObject’s parent/child relationships make it so that if the parent is deleted, its children are deleted as well. So if you want to delete a widget and all of its descendants then all you need to do is delete the parent.

    In your case I probably would make sure all of the dynamically created widgets belong to some kind of container widget/frame and delete that followed by recreating it.

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