摘要: nilNilNULLNSNullnil: A null pointer to an Objective-Cobject. ( #define nil ((id)0) )nil 是一个对象值。Nil: A null pointer to an Objective-Cclass.NULL: A null... 阅读全文
posted @ 2014-07-15 20:06 微博_裕之都 阅读(338) 评论(1) 推荐(0)