void NodeConfigDlg::initNodeTable(){    m_pNodeTable = new QTableWidget(this);    QStringList headerString;      m_pNodeTable->setColumnCount(6);    m_pNodeTable->setRowCount(2);     QGridLayout *pGridLayOut = new QGridLayout(this);    pGridLayOut->addWidget(m_pNodeTable, 0, 0);     headerString<<"序号"<<"系统类型"<<"节点类型"<<"主机名"<<"A网"<<"B网";    m_pNodeTable->setHorizontalHeaderLabels(headerString);}

注意：修改表头的时候，必须要写在pGridLayOut的后面，如果写在GridLayOut的前面，则表头修改无效。