1. Easy Xcode Static Library Subprojects and Submodules
http://www.blog.montgomerie.net/easy-xcode-static-library-subprojects-and-submodules
2. Sub-Projects in Xcode
http://www.cocoanetics.com/2011/12/sub-projects-in-xcode/
3. 各种Xcode相关的主题
如何管理大型的iOS工程
定制化build phases和脚本
在使用静态库时避免重复符号定义
how does __attribute__((constructor)) work?
.....
http://www.alexcurylo.com/blog/2012/05/06/xcode-grab-bag/
4. Create Framework for iOS
https://github.com/kstenerud/iOS-Universal-Framework
http://maniacdev.com/2011/12/tutorial-creating-universal-ios-frameworks-with-xcode-4-make-that-open-source-work-with-arc
http://www.infragistics.com/community/blogs/stevez/archive/2013/02/04/create-your-own-ios-framework.aspx
http://rayvinly.com/how-to-build-a-truly-universal-framework-for-ios-and-mac-with-just-a-single-codebase/
http://code.google.com/p/ios-static-framework/ (2012后没有再update)
http://*.com/questions/17213080/how-to-develop-and-test-an-ios-framework-in-xcode