摘要: class Human { //8 type or isa //retainCount var age: Int?//16 var name: String?//16 var nicknames: [String] = [String]() //返回指向 Human 实例头部的指针 func hea 阅读全文
posted @ 2019-04-02 16:06 zzfx 阅读(620) 评论(0) 推荐(0) 编辑