![xocde_subproj](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_s798AgsCMF5VeW1xHWwmHa5KRDcoRsCi9kxLR8OgsqqYj4KjPIYq4xv_nuLDJjRzfAp08SjJxjbbcFK9uNlnduDH5ROAKF8aNYMZuw2yrvKSlJM_TsC5zKJuFtVypveQ=s0-d)
雖然 Objective C 的經驗不多,但漸漸地會想把一些共用的程式碼弄成 library 來使用,在加上 git 來管理,這時候就會想到 git submodule 的使用。原先以為把 xcode project 拖拉進來就可以了,後來發現這一切都只是幻想 XD 整體上的概念:編譯時要能找到(header search path),連結時要能找到(link binary)。原本以為拖拉其他 project 進來就能自動化搞動,最後發現還是要手動設定一些環境,所以就來筆記一下。
例如有 Base.xcodeproj 和 Test.xcodeproj,先把常用的程式碼都寫在 Base.xcodeproj:
建立 Xcode Project:
![create_base_xcodeproj](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vINIHZgtTDfD9f9OVU-XhNRqcIe7IPGYaGPmje9FaSTy08p1Y7T3muKxD3SiscIlXy3mVkAaz5Y4TNxDu3uE6kIJSl-7WOFjWq-r8ESELz8DF94Iwzp0kMaT0krtudlA=s0-d)
新增 TARGETS -> Add Target:
![add_target_static_lib](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sQvRss97D3UWJaHcuXk4qQEEKaXI-h9SkEDlDJBb7iaviUosXveFadNP-2v0wcUYY_CX5EBiT1xRKqW9qoz5m_PkaAndIsuLgDGbb_9a_YRLVbXSNc_drkwFPOdcXI5A=s0-d)
把想要編成 static library 的程式碼擺進 Compile Sources:
![create_static_library](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_uO9Tk3QkDCodVnuoi_6xghzCmUggA9-F8R1lQRIeGUsTqbHDrtLHXdWRwvxpWgio-6LfsRd7w-EdLV5Zjj8S0oFqwgAycaSXK8c6IU0WTBD8tpIcrqUXE_-z3y2je6=s0-d)
![add_other_source](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sDl8Z3KWqm0JAKz-6DsCICvPA0LJ38HPB4BMBVaK2uud59getyTnwq2WklvlmST1lEmzlUOXNLCh7Gz7WHKuwxPQkcZHDcFtO7AecqdGqbAaceFUmXOvHZTMGLNY9J=s0-d)
使用 git 管理(假設在 /tmp/base.git):
$ mkdir /tmp/base.git
$ cd /tmp/base.git
$ git init --bare
$ cd /path/Base
$ ls
Base Base.xcodeproj BaseLib
$ git init
Initialized empty Git repository in /path/Base/.git/
$ git remote add origin /tmp/base.git
$ git add .
$ git commit -am 'init'
$ git push origin master
在 Test.xcodeproj 裡使用 Base.xcodeproj:
建立 Test xcodeproj:
![create_test_xcodeproj](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sNJrtxrcOfludcAuANqTEciROMOZyvQDQe5Q0LHoUgk1PqYFzGQoHntacJxe_eIi-1UiKQe0kGHKH7DGq0OoY3pTEY_07XJV1RyyFbjiAD7aiV6FvrEQB95BG6t_dXjw=s0-d)
使用 git 管理(假設在 /tmp/test.git):
$ mkdir /tmp/test.git
$ cd /tmp/test.git
$ git init --bare
$ cd /path/Test
$ ls
Test Test.xcodeproj
$ git init
Initialized empty Git repository in /path/Test/.git/
$ git remote add origin /tmp/test.git
$ git add .
$ git commit -am 'init'
$ git push origin master
使用 git submodule 管理 Base library:
$ cd /path/Test
$ ls
Test Test.xcodeproj
$ git submodule add /tmp/base.git libbase
Cloning into 'libbase'...
done.
$ ls -a
. .git Test libbase
.. .gitmodules Test.xcodeproj
$ cat .gitmodules
[submodule "libbase"]
path = libbase
url = /tmp/base.git
$ git commit -am 'add libbase'
[master 5f69c71] add libbase
2 files changed, 4 insertions(+)
create mode 100644 .gitmodules
create mode 160000 libbase
$ git push origin master
設定 Text.xcodeproj:
拖拉 Base.xcodeproj 進來(從 /path/Test/libbase):
![drag_base_xcodeproj](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_skypUxP9C5gIcDBPKpoc9r2F3BS0dAH-9SdoG4361IHtY9TtB63vaIpoQz6jW3q59dPBTnwuHXDPJdvzhGVYSy-jXjjPp93ghSa6G1eO_8oO_nNW9DJriJjoDpRVP9=s0-d)
設定 Header Search (/path/Test/libbase):
![add_header_search](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sKD0Km84CVPJI_rY2lRb0qXN0pn7MPrSsQQ4ePFwr_RDaeo4aQ9pwB_YKHyW-R37J8dKQ4jpq2_kvtTEvk-8TYAooLnLo1tZ71M61q3esY7VAoXOpdGQyg6mms0NgjHQ=s0-d)
![header_search_path](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_ssG50ZTnN3P5q8fyWoDJE3NeawTEUM3rvHoz_9HrCJvvkHS8D2m0-iJLLQATK3ibJ90w04AS-govleWHQbaucaDXDJnZQ7-aze8MNq-F6z2ahjeBrUs2yNX41zchN_zA=s0-d)
設定 Other Linker Flags:
-all_load (如果 library 中有 categories)
設定 Link Binary With Libraries:
![link_binary](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_u1sV1jOUyZV99bJFfxXpgdh1neuVV0YgJXge8vjGorZMrdGYi965ZJBOG-Jyep0D5kTQyYYDuf5DBPFCFyrL4axeVQ5k-pRqMOKfT7VezH_QWFNB5nScfzDZOeMgAaNg=s0-d)
更新 git:
$ cd /path/Test
$ git add .
$ git commit -am 'add libbase'
$ git push origin master
如此一來,未來在取 Test 的時候,就可以這樣用:
$ git clone --recursive /tmp/test.git testxcode
Cloning into 'testxcode'...
done.
Submodule 'libbase' (/tmp/base.git) registered for path 'libbase'
Cloning into 'libbase'...
done.
Submodule path 'libbase': checked out '920380a7c727d7fb42e38e89bd2eac7a3d2ef72f'
$ ls -a testxcode
. .git Test libbase
.. .gitmodules Test.xcodeproj
此外,其他時候可能會需要以下指令:
$ git submodule update --init --recursive