QT的xml dom是否支持xpath那样的解析？ [复制链接]

elementsByTagName
函数是否支持xxx/bbb/ccc....这样的xpath解析规则？
似乎老出错！没有获得我想要的fuck字符窜！
xml src:

<?xml version="1.0" ?>
<root>
  <children code="0">
    <child code="0">child0</child>
    <child code="1">child1</child>
  </children>
  <children code="1">
    <child code="3">child3</child>
    <child code="4">child4</child>
  </children>
  <hello>
    <a>fuck</a>
    <b>world</b>
    <c>go</c>
  </hello>
</root>

str = "hello/a";
QDomElement xRoot =m_xDocPtr ->documentElement();
QDomNodeList xList = xRoot.elementsByTagName( str );
QMessageBox::information( 0, tr( "hello" ), tr( "%1" ).arg( xList.count() ) );
QMessageBox::information( 0, tr( "hello ch cnt" ), tr( "%1" ).arg( xList.at( 0 ).childNodes().count() ) );
return static_cast<QDomElement*>( &xList.at( 0 ) ) ->text();