Qt未解析的外部符号LNK2019

Question

I know that this topic has been discussed, but i really can't find a solution for my problem. I want to read data from an XML file with QDomDocument and i get errors of this type:

main.obj:-1: error: LNK2019: unresolved external symbol “__declspec(dllimport) public: class QDomElement __cdecl QDomNode::toElement(void)const “ (__imp_?toElement@QDomNode@@QEBA?AVQDomElement@@XZ) referenced in function “void __cdecl ListElements(class QDomElement,class QString,class QString)” (?ListElements@@YAXVQDomElement@@VQString@@1@Z)

I included

#include <QCoreApplication>
#include <QtXml/QtXml>
#include <QDebug>

and i also added Qt += xml to .pro file

Answer 1

将模块添加到.pro文件后，您需要运行qmake （这将重新生成包含正确库的makefile，然后链接器将找到这些库）