先记下来~
http://www.cs.colorado.edu/~kena/classes/5448/f12/presentation-materials/myrose.pdf
目测来自：http://cuengineeringonline.colorado.edu/coursedb/view-course/361
另一个：
http://www.raywenderlich.com/46988/ios-design-patterns
先记下来~
http://www.cs.colorado.edu/~kena/classes/5448/f12/presentation-materials/myrose.pdf
目测来自：http://cuengineeringonline.colorado.edu/coursedb/view-course/361
另一个：
http://www.raywenderlich.com/46988/ios-design-patterns