如何在swift4中通过枚举实例的原始值获取其名称?

你不能把案子的名字 String 因为枚举的类型不是 字符串 ,因此您需要添加一个方法自己返回它

public enum TestEnum: UInt16, CustomStringConvertible {
    case ONE = 0x6E71
    case TWO = 0x0002
    case THREE = 0x0000

    public var description: String {
        let value = String(format:"%02X", rawValue)
        return "Command Type = 0x" + value + ", \(name)"
    }

    private var name: String {
        switch self {
        case .ONE: return "ONE"
        case .TWO: return "TWO"
        case .THREE: return "THREE"
        }
    }
}

print(TestEnum.ONE)

// Command Type = 0x6E71, ONE

可以从枚举值创建枚举值,并使用 String.init(describing:) .

public enum TestEnum : UInt16 {
    case ONE    = 0x6E71
    case TWO    = 0x0002
    case THREE  = 0x0000
}

let enumRawValue: UInt16 = 0x6E71

if let enumValue = TestEnum(rawValue: enumRawValue) {
    print(String(describing: enumValue)) //-> ONE
} else {
    print("---")
}