1. 安装homebrew

/usr/bin/ruby -e "$(curl -fsSkL raw.github.com/mxcl/homebrew/go)"

2. 安装uncrustify

brew install uncrustify

3. 下载配置好的workflow包

http://by-igotit.com/wordpress/wp-content/uploads/2012/03/Uncrustify-Objective-C.workflow.tar.gz

4. 解压缩workflow包

mv Uncrustify-Objective-C.workflow.tar.gz ~/Library/Services/
cd ~/Library/Services/
tar zxvf Uncrustify-Objective-C.workflow.tar.gz

5. 下载针对Objective-C语言的Uncrustify配置文件

http://by-igotit.com/wordpress/wp-content/uploads/2012/03/uncrustify_obj_c.txt

6. 移动配置文件到用户主目录

mv uncrustify_obj_c.txt ~/.uncrustify_obj_c.cfg

7. 在keyboard shortcuts中配置快捷键command+shift+F

8. 在xcode中，全选code，使用快捷键格式化code，或者右键在services中uncrustify Objective-C