Swift的enum枚举类型介绍
发布时间:2020-12-14 02:09:33 所属栏目:百科 来源:网络整理
导读:声明枚举类型的几种方法和使用: 一: enum Direction{ case North case South case East case West};//简写如下enum Direction2{ case North,South,West,East}; 二: //申明一个枚举var d = Direction.North;var d2 = Direction.East;d2 = .South;//.South
声明枚举类型的几种方法和使用: 一: enum Direction{ case North case South case East case West }; //简写如下 enum Direction2{ case North,South,West,East };二: //申明一个枚举 var d = Direction.North; var d2 = Direction.East; d2 = .South;//.South因为d2肯定是Direction枚举类型 //.South = Direction.South //明确规定d3类型是Direction,.East就可以省略,同上远离 var d3 : Direction = .East; var d4 : Direction = Direction.East; switch d4 { case .North: println("in north") case .South: println("in south") case .East: println("in east") default: println("other") } //枚举类型一种,相似C enum Couse : Int { case android = 1,ios,windowsphone,symbian } var c : Couse = Couse.ios; let v = c.rawValue;//ios转换成int println("v is: (v)"); var c2 = Couse(rawValue: 4)//根据索引返回枚举值 if c2 == Couse.symbian{ println("is symbian"); } (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |