QGraphicsscene设置一个item为前景层！

[qq_29361517]

如题，如何将一个item设置为场景的前景层，从而，覆盖场景中其他的item！

[军神关云长_大凡]

直接调additem()函数即可。 void QGraphicsScene::addItem(QGraphicsItem * item) Adds or moves the item and all its childen to this scene. This scene takes ownership of the item. If the item is visible (i.e., QGraphicsItem::isVisible() returns true), QGraphicsScene will emit changed() once control goes back to the event loop. If the item is already in a different scene, it will first be removed from its old scene, and then added to this scene as a top-level.