兼容oc的枚举定义

@objc
public enum XXEnumType: Int, RawRepresentable {
    case a = 1
    case b = 2

    public typealias RawValue = String

    public var rawValue: RawValue {
        switch self {
        case .a: return "A"
        case .b: return "B"
        }
    }
    public var intValue: Int {
        switch self {
        case .a: return 1
        case .b: return 2
        }
    }
    public init?(rawValue: Self.RawValue) {
        switch rawValue {
        case "A": self = .a
        case "B": self = .b
        default:
            return nil
        }
    }

    public init?(intValue: Int) {
        switch intValue {
        case 1: self = .a
        case 2: self = .b
        default:
            return nil
        }
    }
}

#iOS