let img = imageFromPC
let data = UIImageJPEGRepresentation(img, 0.1)
let strBase64 = data!.base64EncodedString(options: .lineLength64Characters)
print(strBase64)

    let parameters: Parameters = ["nonce": "\(timeq)" , "akey": "\(UserAkey)" , "skey": "\(UserSkey)", "order_id": "\(UserOrID)", "card" : strBase64 ]

    Alamofire.request(url, method: .get, parameters: parameters, encoding: JSONEncoding.default)
        .downloadProgress(queue: DispatchQueue.global(qos: .utility)) { progress in
            print("Progress: \(progress.fractionCompleted)")

        }
        .validate { request, response, data in

            return .success
        }
        .responseJSON { response in
            debugPrint(response)
    }

        так работает , но как сделать тоже самое только без let strBase64 = data!.base64EncodedString(options: .lineLength64Characters) ?