Objective-C，通常写作ObjC和较少用的Objective C或Obj-C，是扩充C的面向对象编程语言。它主要使用于Mac OS X和GNUstep这两个使用OpenStep标准的系统，而在NeXTSTEP和OpenStep中它更是基本语言。Objective-C是非常“实际”的语言。它使用一个用C写成、很小的运行库，只会令应用程序的大小增加很小，和大部分OO系统使用极大的VM执行时间会取代了整个系统的运作相反。 想要学习Mac编程，首先要了解Objective-C，这里是针对其基本
objc语法学习文档，入门必备~~ Objective-C Reference provides a quick and concise introduction to Objective-C for programmers already familiar with either C or C++,
Objective-C Pocket Reference provides a quick and concise introduction to Objective-C for programmers already familiar with either C or C++, and will continue to serve as a handy reference even after the language is mastered. In addition to covering
