extension UserDefaults {

​

   func save<T:Encodable>(customObject object: T, inKey key: String) {

       let encoder = JSONEncoder()

       if let encoded = try? encoder.encode(object) {

           self.set(encoded, forKey: key)

       }

   }

​

   func retrieve<T:Decodable>(object type:T.Type, fromKey key: String) -> T? {

       if let data = self.data(forKey: key) {

           let decoder = JSONDecoder()

           if let object = try? decoder.decode(type, from: data) {

               return object

           }else {

               print("Couldnt decode object")

               return nil

           }

       }else {

           print("Couldnt find key")

           return nil

       }

   }

​

}