Question

我有一个子类化VTK类的问题，但我认为问题可以链接到任何类型的库。

我做了一个vtkInteractorStyleImage子类，只是重写了一个方法：

#ifndef dcmInteractorStyleImage_h
#define dcmInteractorStyleImage_h

#include "vtkInteractionStyleModule.h" // For export macro
#include "vtkInteractorStyleImage.h"

class VTKINTERACTIONSTYLE_EXPORT dcmInteractorStyle : public vtkInteractorStyleImage
{
public:
    static dcmInteractorStyle *New();
    vtkTypeMacro(dcmInteractorStyle, vtkInteractorStyleImage);

    virtual void OnLeftButtonDown();

    void PrintSelf(ostream& os, vtkIndent indent);
};    

#endif

问题是我在Qt课程中使用它。所以我将它包含在我的CMakeLists.txt（简化）中：

set(GENERIC_VIEW_CPP
     View/UI/dcminteractorstyle.cpp   # my new class
)

SET(GENERIC_VIEW_H
     View/UI/dcminteractorstyle.h     # my new class
)

add_library(generic ${GENERIC_VIEW_CPP} ${GENERIC_VIEW_H})
...
add_library(ui_qt ${UI_QT_CXX}
     ${UI_FORM_HEADERS} ${UI_RESOURCES_RCC}
     ${MODEL_WRAPPED_HEADERS}
     ${GENERIC_VIEW_CPP} ${GENERIC_VIEW_H} #necesary here?
)
qt5_use_modules(ui_qt Core Gui Widgets)
----------------------------------------------------------

# VTK
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})

# ITK
find_package(ITK REQUIRED)
include(${ITK_USE_FILE})
if (ITKVtkGlue_LOADED)
  find_package(VTK REQUIRED)
  include(${VTK_USE_FILE})
else()
  find_package(ItkVtkGlue REQUIRED)
  include(${ItkVtkGlue_USE_FILE})
  set(Glue ItkVtkGlue)
endif()

------------------------------------------------
set_source_files_properties(${UI_RESOURCES_RCC} PROPERTIES GENERATED ON)
add_executable(UtilidadDICOM WIN32 main.cpp ${UI_RESOURCES_RCC})
target_link_libraries(UtilidadDICOM
    model
    ui_qt
    generic
    ${Glue}
    ${VTK_LIBRARIES}
    ${ITK_LIBRARIES}
)

尝试编译的错误：

ui_qt.lib（viewerwidget.cpp.obj）： - 1：错误：LNK2019：未解决外部符号“public：static class dcmInteractorStyle * __cdecl dcmInteractorStyle :: New（void）“（？new @ dcmInteractorStyle @@ SAPAV1 @ XZ）在函数“public：static class vtkSmartPointer __cdecl vtkSmartPointer :: New（void）”中引用（？新@？$ @ vtkSmartPointer @@@@ VdcmInteractorStyle SA'AV1 @ XZ）

ui_qt是一个在CMake中声明的库，如上所示。

有什么想法吗？谢谢。

Answer 1

简短的回答是你的班级没有被联系。在将其链接到可执行文件之前尝试查看泛型中的值。在target_link_libraries之前做一条消息：

MESSAGE(${generic})

并查看generic.lib是否实际链接。

CMake：依赖的新子类“未解析的外部符号”

1 个答案: