How to make a Swift String enum available in Objective-C?

Question

I have this enum with String values, which will be used to tell an API method that logs to a server what kind of serverity a message has. I\'m using Swift 1.2,

Answer 1

Here's what I came up with. In my case, this enum was in the context providing info for a specific class, ServiceProvider.

class ServiceProvider {
    @objc enum FieldName : Int {
        case CITY
        case LATITUDE
        case LONGITUDE
        case NAME
        case GRADE
        case POSTAL_CODE
        case STATE
        case REVIEW_COUNT
        case COORDINATES

        var string: String {
            return ServiceProvider.FieldNameToString(self)
        }
    }

    class func FieldNameToString(fieldName:FieldName) -> String {
        switch fieldName {
        case .CITY:         return "city"
        case .LATITUDE:     return "latitude"
        case .LONGITUDE:    return "longitude"
        case .NAME:         return "name"
        case .GRADE:        return "overallGrade"
        case .POSTAL_CODE:  return "postalCode"
        case .STATE:        return "state"
        case .REVIEW_COUNT: return "reviewCount"
        case .COORDINATES:  return "coordinates"
        }
    }
}

From Swift, you can use .string on an enum (similar to .rawValue). From Objective-C, you can use [ServiceProvider FieldNameToString:enumValue];