Qt设置QWidget背景图片
m_pTitleWidget->setStyleSheet(QString("border-image: url(%1);").arg(QDir::fromNativeSeparators(g_qstrTitlePicUrl)));
m_pTitleWidget->setStyleSheet(QString("border-image: url(%1);").arg(QDir::fromNativeSeparators(g_qstrTitlePicUrl)));