摘要： Design PatternsA design pattern solves a common software engineering problem. Patterns are abstract designs, not code. When you adopt a design, you adapt the general pattern to your specific needs.设计模式解决了一个通用的软件工程问题。 模式是抽象的设计，不是代码。当你采用一个模式，就是让通用模式适应你的特殊需求。No matter what type of app you are creating, 阅读全文

摘要： Back to FrameworksIntegrate Your Code with the FrameworksWhen you develop an app for OS X or iOS, you won’t be on your own. You’ll be drawing on the work done by Apple and others, on the classes they’ve developed and collected in Objective-C frameworks. A framework is a class library that can be sh. 阅读全文