1.你会用Xcode吗?
http://www.cocoachina.com/special/xcode/
2.生命周期(应用程序)
http://www.cocoachina.com/ios/20140710/9089.html
3.运行时
http://southpeak.github.io/blog/2014/10/25/objective-c-runtime-yun-xing-shi-zhi-lei-yu-dui-xiang/
原文：http://www.cnblogs.com/autoARC/p/4733401.html