摘要： FrameworksAn app consists of code you write and frameworks Apple provides. A framework contains a library of methods your app can call. More than one app can access a framework library at the same time.一个应用程序由你编写的代码和Apple提供的框架组成。 一个框架包含了一个应用程序能调用的一个方法库。 同一时间多个应用程序可以同时访问一个框架库。Any app that you develop 阅读全文

摘要： Back to Basic TasksAcquire Foundational Programming SkillsThe Foundation framework, as its name suggests, is the foundational toolkit for all programming for both iOS and OS X. You need to become familiar with this toolkit to be a successful developer for these platforms.Foundation framework(基本框架)，. 阅读全文