CustomDateTransform.swift

import ObjectMapper

class CustomDateTransform: TransformType {
        
        static let dateFormatter: DateFormatter = {
            let df = DateFormatter()
            df.dateFormat = "yyyy-MM-dd"
            return df
        }()
        
        func transformFromJSON(_ value: Any?) -> Date? {
            if let dateStr = value as? String {
                return BirthdayDateTransform.dateFormatter.date(from: dateStr)
            }
            
            return nil
        }
        
        func transformToJSON(_ value: Date?) -> String? {
            return nil
        }
        
        typealias Object = Date
        typealias JSON = String
    }
}