哇塞,我做到了!!!好兴奋!!!谢谢诸位!!!原来很简单!
QImage image(pixmap,WIDTH,HEIGHT,QImage::Format_Indexed8);
QVector<QRgb> colorTable;
for(int i = 0; i < 256; i++)
{
colorTable.push_back(qRgb(i,i,i));
}
image.setColorTable(colorTable);
QPixmap pm = QPixmap::fromImage(image);
ui->label_5->setPixmap(pm);//搞定!!!
再次谢谢诸位耐心的解答!!!!