QT读取XML，求解释！
初学者，大家帮忙解释一下这个是什么意思？

QDomDocument domTree; 
QDomNodeList IEDlist = domTree.elementsByTagName(tag);

QT C++
[解决办法]
QDomNodeList QDomDocument::elementsByTagName ( const QString & tagname ) const
Returns a QDomNodeList, that contains all the elements in the document with the name tagname. The order of the node list is the order they are encountered in a preorder traversal of the element tree.

[解决办法]
Qt Assistant