二、Qt环境搭建#

Qt官网：https://www.qt.io/

1、工程目录下创建3rdparty文件夹,并将Qt的依赖库拷贝进去

2、配置项目根目录的CMakeLists.txt文件，添加如下内容

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# 自动调用moc，uic，rcc处理qt的扩展部分
set(CMAKE_AUTOMOC ON)# 信号和槽
set(CMAKE_AUTOUIC ON)# ui
set(CMAKE_AUTORCC ON)# 位置

set(CMAKE_INCLUDE_CURRENT_DIR ON)

# 设置find__xxx的路径
set(CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/qt)


# qt config
file(
        WRITE
        ${CMAKE_CURRENT_SOURCE_DIR}/build/bin/qt.conf
        "[Paths]
#Prefix=../lib/Qt
#Binaries=bin
#Libraries=lib
Plugins=${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/qt/plugins
#Imports=imports
#Qml2Imports=qml"
)
# 查找qt库
find_package(Qt5Core REQUIRED)
find_package(Qt5Gui REQUIRED)
find_package(Qt5Widgets REQUIRED)
find_package(Qt5OpenGL REQUIRED)
find_package(Qt5Network REQUIRED)

# 定义变量 保存so库
SET(QT_LIBRARIES ${Qt5Core_LIBRARIES} ${Qt5Gui_LIBRARIES} ${Qt5Widgets_LIBRARIES} ${Qt5OpenGL_LIBRARIES}
        ${Qt5Network_LIBRARIES} ${Qt5Xml_LIBRARIES} ${Qt5Qml_LIBRARIES})
# 头文件 路径
include_directories(
        ${Qt5Core_INCLUDE_DIRS}
        ${Qt5Gui_INCLUDE_DIRS}
        ${Qt5Widgets_INCLUDE_DIRS}
        ${Qt5Network_INCLUDE_DIRS})

#线程
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread -lpthread -Wl,--no-as-needed  -g3 -Wall")
# 与位置无关
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")

3、工程中链接Qt库

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add_executable(firstqt main.cpp)
target_link_libraries(
        firstqt
        ${QT_LIBRARIES}
)

其中QT_LIBRARIES是配置好的Qt库的变量