如何将QtCharts库添加到项目中？

Question

我试图将QtCharts库添加到我的项目中，但出现了一个错误：

Target "PTP3" links to target "Qt6::Charts" but the target was not found. Perhaps a find_package() call is missing for an IMPORTED target, or an ALIAS target is missing? 

我通过Qt MaintenanceTool安装了Qt 5：：图表和Qt 6：：图表，但问题仍然存在。有人知道怎么修吗？

我正在使用7.0.2。这是我的Cmake文件。我遵循了https://doc.qt.io/qt-6/qtcharts-index.html的指示，但没有帮助。

cmake_minimum_required(VERSION 3.5)

project(PTP3 VERSION 0.1 LANGUAGES CXX)

set(CMAKE_INCLUDE_CURRENT_DIR ON)

set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(QT NAMES Qt6 Qt5 COMPONENTS Widgets Charts REQUIRED)
find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Widgets REQUIRED)

set(PROJECT_SOURCES
        main.cpp
        footballmatches.cpp
        footballmatches.h
        footballmatches.ui
        pivottable.h
        pivottable.cpp
        pivottable.ui
        stadiumschart.h
        stadiumschart.cpp
        stadiumschart.ui
        some_qml.qml
)

if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
    qt_add_executable(PTP3
        MANUAL_FINALIZATION
        ${PROJECT_SOURCES}
    )
# Define target properties for Android with Qt 6 as:
#    set_property(TARGET PTP3 APPEND PROPERTY QT_ANDROID_PACKAGE_SOURCE_DIR
#                 ${CMAKE_CURRENT_SOURCE_DIR}/android)
# For more information, see https://doc.qt.io/qt-6/qt-add-executable.html#target-creation
else()
    if(ANDROID)
        add_library(PTP3 SHARED
            ${PROJECT_SOURCES}
        )
# Define properties for Android with Qt 5 after find_package() calls as:
#    set(ANDROID_PACKAGE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/android")
    else()
        add_executable(PTP3
            ${PROJECT_SOURCES}
        )
    endif()
endif()

target_link_libraries(PTP3 PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)
target_link_libraries(PTP3 PRIVATE Qt${QT_VERSION_MAJOR}::Charts)

set_target_properties(PTP3 PROPERTIES
    MACOSX_BUNDLE_GUI_IDENTIFIER my.example.com
    MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
    MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
    MACOSX_BUNDLE TRUE
    WIN32_EXECUTABLE TRUE
)

if(QT_VERSION_MAJOR EQUAL 6)
    qt_finalize_executable(PTP3)
endif()

Answer 1

您应该在Cmake中同时使用这两行代码来将qt库中的一个添加到您的项目中，例如，对于qt图表，您需要这样做：

find_package(Qt5Charts REQUIRED)

target_link_libraries(${PROJECT_NAME}

     Qt5::Charts

)

确保在target_link_libraries CMakeLists.txt 文件的末尾添加.。