xcode 8.1 ios 10 参考 ** CocoaPods建立私有仓库 spec repo**
自定义Cocoapods Specs Repo podspec 公共控件都放在这里，有利于统一管理 参考文档 http://www.cocoachina.com/ios/20150228/11206.html http://www.cnblogs.com/wengzilin/p/4760472.html
ERROR | [iOS] unknown: Encountered an unknown error (Simulator iPhone 4s is not available.) during validation. 坑 解决方法 http://www.jianshu.com/p/4e92a6154c80
podspec 参考 http://www.jianshu.com/p/8a7b9232cbab
CocoaPods基础篇之创建私有 repo http://blog.csdn.net/xiaofei125145/article/details/50624578