QGraphicsScene* scene = new QGraphicsScene;
scene->setSceneRect(-600,-600,1200,1200);
scene->setItemIndexMethod(QGraphicsScene::BspTreeIndex);
QPixmap pixmap1(QString("D:/pic/1.png"));
QPixmap pixmap2(QString("D:/pic/2.png"));
pixmap1 = pixmap1.scaledToWidth(400);
pixmap2 = pixmap2.scaledToWidth(200);
QGraphicsPixmapItem *item1 = scene->addPixmap(pixmap1);
QGraphicsPixmapItem *item2 = scene->addPixmap(pixmap2);
这样在view里显示，图片1和2叠起来了，怎么定义位置呢、
