Qt 图像缩放显示

Posted 2021-02-06 ike_li

1.

  

 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);