QPixmap fitpixmap=image.scaled(ui->label->size(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
ui->label->setPixmap(fitpixmap);
ui->label->setAlignment(Qt::AlignCenter);
ui->label->show();
qt 让label显示图片并把图片居中
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转载自blog.csdn.net/sinat_36420785/article/details/81218049
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