Qt QPixmap QImage 图片的等比例缩放到指定大小

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

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