QImage Image;

    Image.load(":/images/f1.png");

    QPixmap pixmap = QPixmap::fromImage(Image);

    int with = secene->width ();//要显示的宽度

    int height =secene->height ();

    QPixmap fitpixmap = pixmap.scaled(with, height, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);  // 饱满填充

    //QPixmap fitpixmap = pixmap.scaled(with, height, Qt::KeepAspectRatio, Qt::SmoothTransformation);  // 按比例缩放

    view->setBackgroundBrush(fitpixmap);