如何编写协议扩展以从Swift枚举中获取所有rawValues

我要做的是创建一个协议扩展来从枚举中获取原始值数组.例如,说我有以下内容：

enum TestType: String,EnumIteratable {
    case unitTest = "Unit Test"
    case uiTest = "UI Test"
}

class EnumIterator: NSObject {
    class func iterateEnum<T: Hashable>(_: T.Type) -> AnyGenerator<T>  {
        var i = 0
        return anyGenerator {
            let next = withUnsafePointer(&i) { UnsafePointer<T>($0).memory }
            return next.hashValue == i++ ? next : nil
        }
    }

   class func getValues<T: Hashable>(_: T.Type) -> [T] {
        let iterator = self.iterateEnum(T)
        var returnArray = [T]()
        for val in iterator {
            returnArray.append(val)
        }
        return returnArray
    }

}

我如何实现协议EnumIteratable,以便我可以调用TestType.getRawValues()并让它返回所有原始枚举值的字符串数组？

谢谢！

您只需添加一个静态属性即可返回所有枚举值.例如：

enum RelationshipStatus: String {

  case Single = "Single"
  case Married = "Married"
  case ItsComplicated = "It's complicated"

  static let all: [RelationshipStatus] = [.Single,.Married,.ItsComplicated]

}

for status in RelationshipStatus.all {
  print(status.rawValue)
}