c++ - qt QGraphicsScene 添加项

Question

http://qt-project.org/doc/qt-4.8/qgraphicsscene.html#addItem

说

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.

我想将项目保留在旧场景中。我该怎么做？

myscene1.addItem(item);
myscene2.addItem(item);// I don't want to remove item from myscene1

Answer 1

您可以复制该项目:

myscene1.addItem(item);
myscene2.addItem(item->clone());