摘要: /* 子类可以重写父类中的方法,甚至是root class中的方法,比如NSObeject 的new方法,但是后提示警告如下 Method is expected to return an instance of its class type 'Student', but is declared to return 'void' */ #import @interface Studen... 阅读全文
posted @ 2016-03-18 14:54 EricSun 阅读(258) 评论(0) 推荐(0) 编辑