ios开发笔记-6-ReactiveCocoa

http://yanshinian.com/mvvm%EF%BC%8Drac/  (同事博客)

http://www.raywenderlich.com/forums/viewtopic.php?f=45&t=20561

http://www.jianshu.com/p/87ef6720a096
http://www.jianshu.com/p/e10e5ca413b7

http://tech.meituan.com/RACSignalSubscription.html