Qt QPixmap QImage 图片等比例缩放到指定大小

1 QPixmap pixmap(path);
2 //pixmap=QPixmap::fromImage(imgShow);
3 pixmap = pixmap.scaled(152, 76, Qt::KeepAspectRatio, Qt::SmoothTransformation);  // 按比例缩放
4 ui->logo->setPixmap(pixmap);

fromImage可以将QImage转换为QPixmap
.scaled可以实现等比缩放