Encoding Dictionary<String, String>

encodable-dictionary.swift

extension Dictionary where Key==String, Value==String {
    struct DictCodingKey: CodingKey {
        var stringValue: String
        init(stringValue: String) {
            self.stringValue = stringValue
        }
        var intValue: Int? { return nil }
        init?(intValue: Int) { return nil }
    }

    func encode(to encoder: Encoder) throws {
        var container = encoder.container(keyedBy: DictCodingKey.self)
        try self.forEach { (key, value) in
            try container.encode(value, forKey: DictCodingKey(stringValue: key))
        }
    }
}