swift

http://swift-lang.org/docs/index.php

http://swift-lang.org/guides/release-0.94/userguide/userguide.html

苹果swift编程语言入门教程【中文版】

http://www.25pp.com/news/news_60984.html

start developing ios apps today

https://developer.apple.com/library/ios/referencelibrary/gettingstarted/roadmapios/index.html

object-oriented programming with objective-c