OC语言-runtime

参考博客

　　IOS高级开发～Runtime（一）

　　　　http://blog.csdn.net/lizhongfu2013/article/details/9496705

apple官方参考

　　Object-C Runtime Programming Guide

https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/ObjCRuntimeGuide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40008048

Objective-C总Runtime的那点事儿（一）消息机制

理解 Objective-C Runtime

 http://justsee.iteye.com/blog/2163777