Swift 打印枚举标签的大写版本

我似乎记不下字符串的标签

我有一个带有关联值的枚举，如下所示：

public enum HTTPMethod {
    case get
    case post(body: [String: Any])
    case put
    case delete
    case patch
}

我可以打印值

let get = HTTPMethod.get
print (get) // get

但我真正想要的是枚举的名称，大写版本

i、 得到就是得到

我正试图为此编写一个扩展：

extension HTTPMethod: CustomStringConvertible {
    public var description: String {
        return String(describing: self)
    }
}

也不起作用

extension HTTPMethod: CustomStringConvertible {
    public var description: String {
        return String(describing: self)
    }
}

带有反射的版本在我的实现中也不起作用：

extension HTTPMethod: CustomStringConvertible {
    public var description: String {
        let mirror = Mirror(reflecting: self)
        return (mirror.children.first?.label)!
    }
}

---

那么如何编写枚举的大写标签呢？

您应该在

CustomStringConvertible

实现中自己添加

String

表示

public enum HTTPMethod {
    case get
    case post(body: [String: Any])
    case put
    case delete
    case patch
}

extension HTTPMethod: CustomStringConvertible {
    public var description: String {
        switch self {
            case .get: 
                return "GET"
            case .post: 
                return "POST"
            case .put: 
                return "PUT"
            case .delete: 
                return "DELETE"
            case .patch: 
                return "PATCH"
        }
    }
}

---

我会这样做，如果它只是枚举案例的精确大写版本。 如果他们不一样，我会按照大卫的回答去做

public enum HTTPMethod {
  case get
  case post(body: [String: Any])
  case put
  case delete
  case patch
  var value: String? {
   return String(describing: self).uppercased()
}
let val = HTTPMethod.get.value
print(val) //prints "GET"