Qt建的Cmake项目分文件编写，并在Qt上编译运行（超详细，只需怎CmakeLists.txt中加这两行）

一、Qt5的Creator中创建一个Cmake项目后会自动生成CMakeLists.txt文件和默认的头文件、源文件、ui文件。（这里比较简单，按Qt创建Cmake项目的步骤来就行）

二、在项目文件夹中创建src文件夹、include文件夹、ui文件夹，将默认的源文件、头文件、ui文件分别放入新建的文件夹中。

三、修改CMakeLists.txt文件(关键)

        1.更改编译文件的路径，在原来的基础上加文件夹名称

set(PROJECT_SOURCES
        src/main.cpp
        src/mainwindow.cpp
        include/mainwindow.h
        ui/mainwindow.ui
)

        2.添加头文件路径，让IDE能找到头文件，这样写代码时有提示且不会报错

include_directories(include)

        3. 添加ui文件生成的路径，用于编译后生成ui头文件

set(CMAKE_AUTOUIC_SEARCH_PATHS ${CMAKE_CURRENT_SOURCE_DIR}/ui)

四、删除项目构建编译时产生的中间文件重新构建编译       

        完整的CMakeLists.txt如下，改动的地方也就只有三处

cmake_minimum_required(VERSION 3.5)

project(04_Layout 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)

include_directories(include)
set(CMAKE_AUTOUIC_SEARCH_PATHS ${CMAKE_CURRENT_SOURCE_DIR}/ui)

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

set(PROJECT_SOURCES
        src/main.cpp
        src/mainwindow.cpp
        include/mainwindow.h
        ui/mainwindow.ui
)

if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
    qt_add_executable(04_Layout
        MANUAL_FINALIZATION
        ${PROJECT_SOURCES}
    )
# Define target properties for Android with Qt 6 as:
#    set_property(TARGET 04_Layout 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(04_Layout 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(04_Layout
            ${PROJECT_SOURCES}
        )
    endif()
endif()

target_link_libraries(04_Layout PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)

set_target_properties(04_Layout 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}
)

if(QT_VERSION_MAJOR EQUAL 6)
    qt_finalize_executable(04_Layout)
endif()