nil Nil NULL NSNull 之间的区别
摘要:
nil -> Null-pointer to objective- c objectNIL -> Null-pointer to objective- c class 表示对类进行赋空值NULL: A null pointer to anything else, is for C-style mem 阅读全文
posted @ 2017-02-17 18:19 二狗你变了 阅读(242) 评论(0) 推荐(0) 编辑