中文：http://www.cocoachina.com/applenews/devnews/2013/1204/7468.html
英文：http://www.raywenderlich.com/41377/creating-a-static-library-in-ios-tutorial
中文：http://www.cocoachina.com/applenews/devnews/2013/1204/7468.html
英文：http://www.raywenderlich.com/41377/creating-a-static-library-in-ios-tutorial