如何在 Swift 中使用 Int 类型的多个 Enum 原始值？

Question

如何Int在 Swift 中使用多个 Enum 类型的原始值？我收到此错误：

枚举“case”声明中逗号后的预期标识符。

就我而言，我希望onGoingcase 接受多个Int原始值，以便代码可以相应地返回状态。

enum STATUS_CODE : Int {
    
    case onGoing    = 5, 50,70, 90
    case atWorkshop = 10
    case completed  = 16
    case comedy     = 35
    case crime      = 80
    case NoDate     = 0
    
    func getString() -> String {
        switch self {
        case .onGoing   : return "New order"
        case .atWorkshop: return "At workshop"
        case .completed : return "Animation"
        case .comedy    : return "Comedy"
        case .crime     : return "Crime"
        case .NoDate    : return "No Order"
        }
    }
}

Answer 1

Enumcase 不能有多个 rawValues。因为想象你这样称呼：

print( STATUS_CODE.onGoing.rawValue )

您期望打印什么值？

相反，您可以拥有一个像您想到的那样的自定义枚举：

enum STATUS_CODE: RawRepresentable {

    init(rawValue: Int) {
        switch rawValue {
        case 5, 50,70, 90: self = .onGoing(rawValue)
        case 10: self = .atWorkshop
        case 16: self = .completed
        case 35: self = .comedy
        case 80: self = .crime
        case 0: self = .NoDate

        default: self = .unknown(rawValue)
        }
    }

    var rawValue: Int {
        switch self {
        case .onGoing(let rawValue): return rawValue
        case .atWorkshop: return 10
        case .completed: return 16
        case .comedy: return 35
        case .crime: return 80
        case .NoDate: return 0
        case .unknown(let rawValue): return rawValue
        }
    }

    case onGoing(Int)
    case atWorkshop
    case completed
    case comedy
    case crime
    case NoDate

    case unknown(Int)

    func getString() -> String {
        switch self {
        case .onGoing   : return "New order"
        case .atWorkshop: return "At workshop"
        case .completed : return "Animation"
        case .comedy    : return "Comedy"
        case .crime     : return "Crime"
        case .NoDate    : return "No Order"

        case .unknown(let rawValue): return "Unknown \(rawValue)"
        }
    }
}

_{当然，这是一个演示，可以重构；）}