Qt 图片适应QLabel控件大小（饱满缩放和按比例缩放）

直接上代码：

QImage Image; 2     Image.load("d:/test.jpg"); 3     QPixmap pixmap = QPixmap::fromImage(Image); 4     int with = ui->labPic->width(); 5     int height = ui->labPic->height(); 6     QPixmap fitpixmap = pixmap.scaled(with, height, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);  // 饱满填充 7     //QPixmap fitpixmap = pixmap.scaled(with, height, Qt::KeepAspectRatio, Qt::SmoothTransformation); // 按比例缩放
    ui->labPic->setPixmap(fitpixmap);