在 Visual Studio 中构建 Qt 项目时出现 LNK2019 错误

Question

我使用 CMake 制作了一个 Visual Studio 项目，当我尝试编译它时，我得到了这些错误。该错误似乎仅与 QDomDocument 对象有关，我没有收到与其他 Qt 类相关的任何链接错误；

Severity    Code    Description Project File    Line    Suppression State
Error   LNK2019 unresolved external symbol "__declspec(dllimport) public: __cdecl QDomNode::~QDomNode(void)" (__imp_??1QDomNode@@QEAA@XZ) referenced in function "private: void __cdecl Graph::readFromFile(class QString)" (?readFromFile@Graph@@AEAAXVQString@@@Z)    Gps_test    C:\Users\Cristi\Desktop\an2 sem 2\QT\gps_test1\build\graph.obj  1   

Severity    Code    Description Project File    Line    Suppression State
Error   LNK2019 unresolved external symbol "__declspec(dllimport) public: class QDomNodeList __cdecl QDomNode::childNodes(void)const " (__imp_?childNodes@QDomNode@@QEBA?AVQDomNodeList@@XZ) referenced in function "private: void __cdecl Graph::readFromFile(class QString)" (?readFromFile@Graph@@AEAAXVQString@@@Z) Gps_test    C:\Users\Cristi\Desktop\an2 sem 2\QT\gps_test1\build\graph.obj  1   

Severity    Code    Description Project File    Line    Suppression State
Error   LNK2019 unresolved external symbol "__declspec(dllimport) public: bool __cdecl QDomDocument::setContent(class QIODevice *,class QString *,int *,int *)" (__imp_?setContent@QDomDocument@@QEAA_NPEAVQIODevice@@PEAVQString@@PEAH2@Z) referenced in function "private: void __cdecl Graph::readFromFile(class QString)" (?readFromFile@Graph@@AEAAXVQString@@@Z)  Gps_test    C:\Users\Cristi\Desktop\an2 sem 2\QT\gps_test1\build\graph.obj  1   

这是我的源文件的 CMake 文件：

# Defines the minimum CMake version required for the CMakeLists.txt file
# to be correctly interpreted. Older versions of CMake may not contain
# all the features to "understand" this file.
cmake_minimum_required(VERSION 3.10.0 FATAL_ERROR)

# Defines the name and language the project will be using.
project(Gps_test LANGUAGES CXX)

# Set the path to the Qt5 installation's CMake instructions.
set(Qt5_DIR "D:/qt/5.10.1/msvc2017_64/lib/cmake/Qt5")

# Automatically add the current source and build directories to the
# include path.
set(CMAKE_INCLUDE_CURRENT_DIR ON)

# Automatically create Qt5 MOCs at compile time.
set(CMAKE_AUTOMOC ON)

# Automatically create Qt5 UICs at compile time.
set(CMAKE_AUTOUIC ON)

# Include Qt5 and its widgets.
find_package(Qt5 REQUIRED COMPONENTS Core Widgets Gui)

# Add to PROJECT_SOURCES variable all the filenames inside
# ${CMAKE_CURRENT_SOURCE_DIR} which respect the given pattern.
file(GLOB PROJECT_SOURCES "*.cpp")

# Instruct CMake to create an executable based on all the .cpp
# sources of the project. You may, for example, create multiple
# executables based on different source files, inside the same
# project.
add_executable(${PROJECT_NAME} ${PROJECT_SOURCES})

# Specify libraries or flags to use when linking a given target. 
target_link_libraries(${PROJECT_NAME} 
    PUBLIC 
    Qt5::Core
    Qt5::Gui
    Qt5::Widgets)

有人知道我该如何解决这个问题吗？谢谢。

Answer 1

这些是Xml 组件的一部分。试试这个：

find_package(Qt5 REQUIRED COMPONENTS Core Widgets Gui Xml)
...
target_link_libraries(${PROJECT_NAME} 
PUBLIC 
Qt5::Core
Qt5::Gui
Qt5::Widgets
Qt5::Xml
)