ios - 如何从 Swift 中的原始值获取枚举？

Question

我正在尝试从原始值中获取枚举类型:

enum TestEnum: String {
    case Name
    case Gender
    case Birth

    var rawValue: String {
        switch self {
        case .Name: return "Name"
        case .Gender: return "Gender"
        case .Birth: return "Birth Day"
        }
    }
}

let name = TestEnum(rawValue: "Name")       //Name
let gender = TestEnum(rawValue: "Gender")   //Gender

但似乎 rawValue 不适用于带空格的字符串:

let birth = TestEnum(rawValue: "Birth Day") //nil

有什么获取方法的建议吗？

Answer 1

太复杂了，直接把原始值赋值给case

enum TestEnum: String {
  case Name = "Name"
  case Gender = "Gender"
  case Birth = "Birth Day"
}

let name = TestEnum(rawValue: "Name")!       //Name
let gender = TestEnum(rawValue: "Gender")!   //Gender
let birth = TestEnum(rawValue: "Birth Day")! //Birth

如果案例名称与原始值匹配，您甚至可以省略它

enum TestEnum: String {
  case Name, Gender, Birth = "Birth Day"
}

在 Swift 3+ 中，所有枚举大小写都是小写