http://guides.cocoapods.org/syntax/podfile.html#post_install
ObjectiveSugar(库)
也就是target在同一个project中并没有太多的影响,一个project对应一个target就好;
http://www.jianshu.com/p/8af475c4f717
podfile 中对应的链接;
https://docs.rubygems.org/
有感ruby gems的内容;
https://guides.cocoapods.org/
cocoa pods的官网
https://guides.cocoapods.org/using/the-podfile.html
http://blog.csdn.net/momohen/article/details/50818306
https://objccn.io/issue-6-4/