QMake 之遍历文件夹

前言

在开发过程中，不知道你有没有遇到中途需要导入新的多个三方库的情况，反正我遇到了，在这里记录一下偷懒技巧。

知识点

目录

QMake介绍

这里我简要说说我自己对于 QMake 的理解吧，顺便挂一个较为详细的链接，你可以跳转到这里，阅读详情。
我认为的 QMake，本质上与 CMake 类似，它们的目标都是在跨平台不用修改配置文件代码，在项目开发中，越来越多的使用 CMake 配置开发项目，而 QMake 也是随着 Qt 的普及而被人们接触。

Qt 项目文件 -.pro 介绍

用 QMake 语言格式所表示的 Qt 项目配置文件，说明项目的配置属性等信息，用于 Makefile 的生成或者编译

QMake 遍历实际用处

前置说明: 遍历当前目录源代码所有文件

-foo
    -ExampleQMakeErgodicDir.pro
    -ExampleQMakeErgodicDir.pro.user
    -helloWorld.h
    -helloWorld.cpp
    -main.cpp

Step 01: 在.pro 文件中添加一下 QMake 代码*

# Traverse all the files in the source code directory and output them to $${SOURCES_DIR_ALL_FILES}
SOURCES_DIR_ALL_FILES = $$files($$PWD/*.*)

# Traverse the source code directory header file, and output to $${SOURCES_DIR_HEADER_FILES}
SOURCES_DIR_HEADER_FILES = $$files($$PWD/*.h)

# Traverse the source code directory cpp file, and output to $${SOURCES_DIR_CPP_FILES}
SOURCES_DIR_CPP_FILES = $$files($$PWD/*.cpp)

# Output variable $${SOURCES_DIR_ALL_FILES} All elements of files
for(filename, SOURCES_DIR_ALL_FILES): message('[SOURCES_DIR_ALL_FILES] print filename is $${filename}')

# Output variable $${SOURCES_DIR_HEADER_FILES} All elements of files
for(filename, SOURCES_DIR_HEADER_FILES): message('[SOURCES_DIR_HEADER_FILES] print filename is $${filename}')

# Output variable $${SOURCES_DIR_CPP_FILES} All elements of files
for(filename, SOURCES_DIR_CPP_FILES): message('[SOURCES_DIR_CPP_FILES] print filename is $${filename}')

输出信息

// SOURCES_DIR_ALL_FILES
Project MESSAGE: [SOURCES_DIR_ALL_FILES] print filename is G:/ExampleQMakeErgodicDir/ExampleQMakeErgodicDir.pro
Project MESSAGE: [SOURCES_DIR_ALL_FILES] print filename is G:/ExampleQMakeErgodicDir/ExampleQMakeErgodicDir.pro.user
Project MESSAGE: [SOURCES_DIR_ALL_FILES] print filename is G:/ExampleQMakeErgodicDir/helloWorld.cpp
Project MESSAGE: [SOURCES_DIR_ALL_FILES] print filename is G:/ExampleQMakeErgodicDir/helloWorld.h
Project MESSAGE: [SOURCES_DIR_ALL_FILES] print filename is G:/ExampleQMakeErgodicDir/main.cpp

// SOURCES_DIR_HEADER_FILES
Project MESSAGE: [SOURCES_DIR_HEADER_FILES] print filename is G:/ExampleQMakeErgodicDir/helloWorld.h

// SOURCES_DIR_CPP_FILES
Project MESSAGE: [SOURCES_DIR_CPP_FILES] print filename is G:/ExampleQMakeErgodicDir/helloWorld.cpp
Project MESSAGE: [SOURCES_DIR_CPP_FILES] print filename is G:/ExampleQMakeErgodicDir/main.cpp

// [Warning]
// Repeated output can be solved by setting the value of the config element, but it's a bit troublesome. 
// Here, we directly choose to ignore this situation.
Project MESSAGE: [SOURCES_DIR_ALL_FILES] print filename is G:/ExampleQMakeErgodicDir/ExampleQMakeErgodicDir.pro
Project MESSAGE: [SOURCES_DIR_ALL_FILES] print filename is G:/ExampleQMakeErgodicDir/ExampleQMakeErgodicDir.pro.user
Project MESSAGE: [SOURCES_DIR_ALL_FILES] print filename is G:/ExampleQMakeErgodicDir/helloWorld.cpp
Project MESSAGE: [SOURCES_DIR_ALL_FILES] print filename is G:/ExampleQMakeErgodicDir/helloWorld.h
Project MESSAGE: [SOURCES_DIR_ALL_FILES] print filename is G:/ExampleQMakeErgodicDir/main.cpp
Project MESSAGE: [SOURCES_DIR_HEADER_FILES] print filename is G:/ExampleQMakeErgodicDir/helloWorld.h
Project MESSAGE: [SOURCES_DIR_CPP_FILES] print filename is G:/ExampleQMakeErgodicDir/helloWorld.cpp
Project MESSAGE: [SOURCES_DIR_CPP_FILES] print filename is G:/ExampleQMakeErgodicDir/main.cpp