2014年6月24日
objects classes and metaclasses in Objective-C
摘要： Objective-C is a class-based object system. Each object is an instance of some class; the object'sisapointer points to its class. That class describ... 阅读全文
posted @ 2014-06-24 23:08 一壶浊酒 阅读(211) 评论(0) 推荐(0)