未定义对“QVTKWidget::QVTKWidget”的引用

Posted 2023-02-17

【中文标题】未定义对“QVTKWidget::QVTKWidget”的引用

【英文标题】：undefined reference to 'QVTKWidget::QVTKWidget'

【发布时间】：2020-11-26 08:13:56

【问题描述】：

环境是VTK-8.0 ITK-5.2 QT-5.12

编译这个cmake文件时出现这个错误：

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(QtDICOMViewer)

find_package(VTK REQUIRED)
#find_package(VTK COMPONENTS
#        vtkCommonCore
#        vtkFiltersSources
#        vtkGUISupportQt
#        vtkIOImage
#        vtkInteractionImage
#        vtkFiltersCore
#        vtkInfovisCore
#        vtkInteractionStyle
#        vtkViewsQt
#        vtkCommonDataModel
#        vtkCommonExecutionModel
#        vtkRenderingCore
#        vtkRenderingFreeType
#        vtkRenderingOpenGL2
#        )
include($VTK_USE_FILE)


if("$VTK_QT_VERSION" STREQUAL "")
    message(FATAL_ERROR "VTK was not built with Qt")
endif()

find_package(ITK REQUIRED)
include($ITK_USE_FILE)

include_directories(
        $CMAKE_CURRENT_BINARY_DIR
        $CMAKE_CURRENT_SOURCE_DIR
)
# Set your files and resources here
set( Srcs main.cpp mainwindow.cpp)

set( Hdrs mainwindow.h )

set( MOC_Hdrs mainwindow.h )

set( UIs mainwindow.ui )

set( QRCs images.qrc )

# Instruct CMake to run moc automatically when needed.
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

find_package(Qt5 COMPONENTS Widgets REQUIRED QUIET)
qt5_wrap_ui(UI_Srcs $UIs)
qt5_add_resources(QRC_Srcs $QRCs )

source_group("Resources" FILES
        $UIs
        $QRCs
        $EXE_ICON # Not present
        )

source_group("Generated" FILES
        $UI_Srcs
        $MOC_Srcs
        $QRC_Srcs
        )

include_directories(/usr/include/gdcm-2.6)

# CMAKE_AUTOMOC in ON so the MocHdrs will be automatically wrapped.
add_executable(QtDICOMViewer MACOSX_BUNDLE $Srcs $Hdrs $UI_Srcs $MOC_Hdrs $QRC_Srcs)
qt5_use_modules(QtDICOMViewer Core Gui Widgets)
target_link_libraries(QtDICOMViewer $VTK_LIBRARIES $ITK_LIBRARIES)

错误是：

 undefined reference to 'QVTKWidget::QVTKWidget' in ui.mainwindow.h:xxx

没有 LINK 错误和任何包含错误，只是无法检测到此变量。我整天都在苦苦挣扎:(但是当我在 VTK/Examples 中编译示例时，没有任何失败。示例 CMakeLists 是：

cmake_minimum_required(VERSION 3.3 FATAL_ERROR)

project(QtVTKRenderWindows)

find_package(VTK COMPONENTS
  vtkCommonCore
  vtkFiltersSources
  vtkGUISupportQt
  vtkIOImage
  vtkInteractionImage
  vtkFiltersCore
  vtkInfovisCore
  vtkInteractionStyle
  vtkViewsQt
)
include($VTK_USE_FILE)


if("$VTK_QT_VERSION" STREQUAL "")
  message(FATAL_ERROR "VTK was not built with Qt")
endif()

include_directories(
        $CMAKE_CURRENT_BINARY_DIR
        $CMAKE_CURRENT_SOURCE_DIR
)
# Set your files and resources here
set( Srcs QtVTKRenderWindowsApp.cxx QtVTKRenderWindows.cxx)

set( Hdrs QtVTKRenderWindows.h)

set( MOC_Hdrs QtVTKRenderWindows.h)

#set( UIs QtVTKRenderWindows.ui )

set( QRCs Icons/icons.qrc )

# Instruct CMake to run moc automatically when needed.
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

find_package(Qt5 COMPONENTS Widgets REQUIRED QUIET)
#qt5_wrap_ui(UI_Srcs $UIs)
qt5_add_resources(QRC_Srcs $QRCs )

source_group("Resources" FILES
        $UIs
        $QRCs
        $EXE_ICON # Not present
        )

source_group("Generated" FILES
        $UI_Srcs
        $MOC_Srcs
        $QRC_Srcs
        )

# CMAKE_AUTOMOC in ON so the MocHdrs will be automatically wrapped.
add_executable(QtVTKRenderWindows MACOSX_BUNDLE $Srcs $Hdrs $UI_Srcs $MOC_Hdrs $QRC_Srcs)
qt5_use_modules(QtVTKRenderWindows Core Gui Widgets)
target_link_libraries(QtVTKRenderWindows $VTK_LIBRARIES)

我找不到它们之间的任何区别。那么代码有没有可能导致这个错误呢？

【参考方案1】：

你必须将你的程序链接到库 vtkGUISupportQt-7.1

就我而言，我在 ubuntu 20.04 中，该库位于 /usr/lib/x86_64-linux-gnu/libvtkGUISupportQt-7.1.so 中

你可以得到它安装apt包：libvtk7-qt-dev

apt-get install libvtk7-qt-dev