星尘的天空

摘要： Frameworks[基础框架]An app consists of(由×××组成) code that you write and frameworks provided by Apple. A framework contains a library of methods that your app can call. More than one app can access a framework library at the same time.[一个应用程序是由两部分组成：你自己编写的代码和苹果提供的框架库。框架包含了由很多方法组成的文库，你的应用程序可 阅读全文

摘要： Basic Tasks[基本功能]Now that you’ve learned enough about Objective-C to read and write basic code, you can begin to think in terms of objects. Just as you would think about objects in the real world, you need to think about what an object contains, what you can do with it, and how it relates to other o 阅读全文