Swift – enum’s rawValue property not recognized

enumsswift

I'm using Xcode 6's playground to try out enums in Swift:

enum Rank: String
{
    case One = "One", Two="Two"

    init(rawValue : String)
    {
        self.rawValue = rawValue
    }
}

I want to override init so that the enum can be initialized using it's rawValue as argument. But I get an error:

enter image description here

But according to the Apple's Swift guide my code should be correct.

Best Solution

The conversion methods between enums and their raw values changed between Xcode 6.0 and Xcode 6.1. The fromRaw() and toRaw() method have been replaced by a (failable) initializer and a rawValue property:

Xcode 6.0:

// raw value to enum:
if let rank = Rank.fromRaw("One") { }

// enum to raw value:
let str = rank.toRaw()

Xcode 6.1:

// raw value to enum:
if let rank = Rank(rawValue: "One") { }

// enum to raw value:
let str = rank.rawValue

Related Solutions

C# – Getting attributes of Enum’s value

This should do what you need.

try
{
  var enumType = typeof(FunkyAttributesEnum);
  var memberInfos = 
  enumType.GetMember(FunkyAttributesEnum.NameWithoutSpaces1.ToString());
  var enumValueMemberInfo = memberInfos.FirstOrDefault(m => 
  m.DeclaringType == enumType);
  var valueAttributes = 
  enumValueMemberInfo.GetCustomAttributes(typeof(DescriptionAttribute), false);
  var description = ((DescriptionAttribute)valueAttributes[0]).Description;
}
catch
{
    return FunkyAttributesEnum.NameWithoutSpaces1.ToString()
}

Java – Override valueof() and toString() in Java enum

You can try out this code. Since you cannot override valueOf method you have to define a custom method (getEnum in the sample code below) which returns the value that you need and change your client to use this method instead.

public enum RandomEnum {

    StartHere("Start Here"),
    StopHere("Stop Here");

    private String value;

    RandomEnum(String value) {
        this.value = value;
    }

    public String getValue() {
        return value;
    }

    @Override
    public String toString() {
        return this.getValue();
    }

    public static RandomEnum getEnum(String value) {
        for(RandomEnum v : values())
            if(v.getValue().equalsIgnoreCase(value)) return v;
        throw new IllegalArgumentException();
    }
}

Best Solution

Related Solutions

C# – Getting attributes of Enum’s value

Java – Override valueof() and toString() in Java enum

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