枚举 – Swift枚举.toRaw和.fromRaw与Xcode 6.1
发布时间:2020-12-14 06:03:24 所属栏目:百科 来源:网络整理
导读:在Xcode 6.1中,toRaw和fromRaw函数的枚举不再工作: enum TestEnum : String { case A = "a" case B = "b"}if let a = TestEnum.fromRaw("a") { prinln(a.toRaw())} 错误: 'TestEnum' does not have a member named 'toRaw''TestEnum.Type' does not have
在Xcode 6.1中,toRaw和fromRaw函数的枚举不再工作:
enum TestEnum : String { case A = "a" case B = "b" } if let a = TestEnum.fromRaw("a") { prinln(a.toRaw()) } 错误: 'TestEnum' does not have a member named 'toRaw' 'TestEnum.Type' does not have a member named 'fromRaw'
从raw使用带有rawValue的failable初始化器创建枚举,并使用属性rawValue获取原始值。
if let a = TestEnum(rawValue: "a") { println(a.rawValue) } 有关详细信息,请阅读the changelog。 (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! |