QPainter painter;
dy = new QWebPage();
QString a = "<html><head></head><body>a111111</body></html>";
QPrinter *d = new QPrinter();
d->setPaperSize(QPrinter::A4);
d->setOrientation(QPrinter::Portrait);
QPrintDialog printDialog(d,this);
if (printDialog.exec() == QDialog::Accepted)
{
painter.begin(d);
dy->mainFrame()->setHtml(a);
wangye->setPage(dy);//去掉这行打印出来的就是白纸
dy->mainFrame()->render(&painter);
painter.end();
}
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wangye是QWebView类型，如果去掉wangye->setPage(dy);这行，就打印白纸一张，如果加上这行，就能打印出a111111，这是为什么呢？
