尝试导入 QuickControls 时出错

Question

Cmake我想用in做一个项目Ubuntu。

我的CMakeList是：

cmake_minimum_required(VERSION 2.8.3)
project(client_ros)

find_package(catkin REQUIRED COMPONENTS
  roscpp
  std_msgs
  qt_build
)

file(GLOB_RECURSE SOURCES RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} 
FOLLOW_SYMLINKS src/*.cpp include/client_ros/*.hpp 
include/client_ros/*.h)
file(GLOB QT_RESOURCES RELATIVE ${CMAKE_CURRENT_SOURCE_DIR}             
resources/*.qrc)
include_directories(include ${catkin_INCLUDE_DIRS})
#################################
find_package(Qt5Core REQUIRED)
find_package(Qt5Sql REQUIRED)
find_package(Qt5Widgets REQUIRED)
find_package(Qt5Quick REQUIRED)
find_package(Qt5Multimedia REQUIRED)


find_package(Qt5Qml REQUIRED)


set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_AUTOMOC ON)

#set configs
set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)

QT5_ADD_RESOURCES(QT_RESOURCES_CPP ${QT_RESOURCES})
QT5_WRAP_UI(QT_FORMS_HPP ${QT_FORMS})
QT5_WRAP_CPP(QT_MOC_HPP ${QT_MOC})
include_directories(
    ${Qt5Core_INCLUDE_DIRS}
    ${Qt5Gui_INCLUDE_DIRS}
    ${Qt5Quick_INCLUDE_DIRS}
    ${Qt5QuickControls2_INCLUDE_DIRS}
    ${Qt5Widgets_INCLUDE_DIRS}
    ${Qt5PrintSupport_INCLUDE_DIRS}
    ${Qt5Qml_INCLUDE_DIRS}
   # ./src
    ${Qt5Sql_INCLUDE_DIRS}
    ${Qt5Charts_INCLUDE_DIRS}
    ${Qt5Multimedia_INCLUDE_DIRS}
    ${QT_INCLUDE_DIR}
    )

add_definitions( -std=c++11 -fPIC)
add_definitions(${Qt5Widgets_DEFINITIONS} ${QtQml_DEFINITIONS} 
${${Qt5Quick_DEFINITIONS}})

catkin_package(
 INCLUDE_DIRS
  include
  CATKIN_DEPENDS
  std_msgs
  roscpp

)
include_directories(include)
include_directories(${catkin_INCLUDE_DIRS})
include_directories(${Eigen_INCLUDE_DIRS})


add_executable(client_ros_node src/client_ros_node.cpp
src/clientclass.cpp
include/client_ros/clientclass.h
    ${coreheaders}
    ${corecpps}
)
#qt5_use_modules(gui Quick Core)
add_library(${PROJECT_NAME}

    ${QT_SOURCES}
    ${QT_MOC_HPP}
    ${QT_RESOURCES_CPP}
    ${QT_MOC}
    ${QT_UI_H}
    )
    target_link_libraries(client_ros_node ${catkin_LIBRARIES})
    target_link_libraries(client_ros_node
        Qt5::Core
        Qt5::Widgets
        Qt5::Quick
        Qt5::Sql
        Qt5::Multimedia
        )
add_dependencies(client_ros_node 
client_ros_generate_messages_cpp_qt_build)




qt5_add_resources(qml_QRC resources/qml.qrc)
qt5_use_modules(client_ros_node Quick Gui Core Widgets)

## Mark cpp header files for installation
install(DIRECTORY include/client_ros/
  DESTINATION ${CATKIN_PACKAGE_INCLUDE_DESTINATION}
  FILES_MATCHING PATTERN "*.h"
)

我收到以下错误：

QQmlApplicationEngine 无法加载组件文件:///home/amir/work_space/build/client_ros/devel/lib/client_ros/main.qml:1 模块“QtQuick”版本 2.9 未安装

当我添加时find_package(Qt5QuickControls2 REQUIRED)，出现以下错误：

/home/amir/work_space/src/client_ros/CMakeLists.txt:19：错误：通过在 CMAKE_MODULE_PATH 中不提供“FindQt5QuickControls2.cmake”，该项目要求 CMake 查找“Qt5QuickControls2”提供的包配置文件，但 CMake 没有找一个。找不到“Qt5QuickControls2”提供的具有以下任何名称的包配置文件： Qt5QuickControls2Config.cmake qt5quickcontrols2-config.cmake 将“Qt5QuickControls2”的安装前缀添加到 CMAKE_PREFIX_PATH 或将“Qt5QuickControls2_DIR”设置为包含上述之一的目录文件。如果“Qt5QuickControls2”提供了单独的开发包或SDK，请确保其已安装。

Answer 1

你的第二个答案给了你最大的线索。您缺少（至少）QtQuickControls2 的 CMake 配置文件。在 Ubuntu 上，如果包提供 CMake 配置文件（如 Qt5 那样），它们将位于-dev包的版本中。确保您拥有-dev正在使用的 Qt5 组件的所有软件包。

如果您使用 apt 中的 Qt5：

$ sudo apt-get install qtbase5-dev              ## provides Core, Sql and Widgets
$ sudo apt-get install qtdeclarative5-dev       ## provides Quick and Qml
$ sudo apt-get install qtmultimedia5-dev        ## provides Multimedia
$ sudo apt-get install qtquickcontrols2-5-dev  ## provides QuickControls2

如果您通过其源使用 Qt5，请确保您已根据其说明正确配置和安装了 Qt5。

然后，使用最小的CMakeLists.txt像：

cmake_minimum_required(VERSION 2.8)

find_package(Qt5Core REQUIRED)
find_package(Qt5Sql REQUIRED)
find_package(Qt5Widgets REQUIRED)
find_package(Qt5Quick REQUIRED)
find_package(Qt5Multimedia REQUIRED)
find_package(Qt5Qml REQUIRED)

foreach(c Core Sql Widgets Quick Multimedia Qml)
    if(${Qt5${c}_FOUND})
        message(STATUS "Qt5${c} found!")
    endif()
endforeach()

结果如下：

$ cmake .           
-- The C compiler identification is GNU 7.3.0
-- The CXX compiler identification is GNU 7.3.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Qt5Core found!
-- Qt5Sql found!
-- Qt5Widgets found!
-- Qt5Quick found!
-- Qt5Multimedia found!
-- Qt5Qml found!
-- Configuring done
-- Generating done
-- Build files have been written to: /home/nega/qt

$

如果您对在 Ubuntu 上安装缺少的软件仍有疑问，您可以尝试其他资源。