QT reading XML files using qdomdocument

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Preface

MainWindow.obj error: LNK2019: Unresolved external symbols “__declspec(dllimport) public: __cdecl QDomDocument::QDomDocument(class QString const &)” (_imp[email protected]@[email protected]@@@Z), The sign is in the function “public: void __cdecl MainWindow::openXML(class QString)” ([email protected]@@[email protected]@@Z) Cited in

MainWindow.obj error: LNK2019: Unresolved external symbols “__declspec(dllimport) public: __cdecl QDomDocument::~QDomDocument(void)” (_imp[email protected]@[email protected]), The sign is in the function “public: void __cdecl MainWindow::openXML(class QString)” ([email protected]@@[email protected]@@Z) Cited in

One 、 The reason for the error

Despite the various dom The header file is still useless

#include <QMainWindow>
#include <QtXml/QDomDocument>
#include <QtXml/QDomComment>
#include <QtXml/QDomElement>
#include <QTreeWidgetItem>

Two 、 terms of settlement

QT       += core gui
QT       += xml

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \
    MainWindow.cpp

HEADERS += \
    MainWindow.h

FORMS += \
    MainWindow.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${
    TARGET}/bin
else: unix:!android: target.path = /opt/$${
    TARGET}/bin
!isEmpty(target.path): INSTALLS += target