Question

我是swift的新手，我正在尝试整合CCAvenue支付网关。我正在点击服务器从CCAvenue服务器获取支付选项列表，我在响应中获取但是我无法将数据解析为JSON对象，它会抛出一些异常。在此先感谢您的帮助

这是我的代码

override func viewDidLoad() {
        super.viewDidLoad()

let urlAsString = "https://test.ccavenue.com/transaction/transaction.do?"

        let myRequestString = "command=\(COMMAND)&currency=\(currency)&amount=\(amount)&access_code=\(accessCode)&customer_identifier=\(customerIdentifier)"
        let myRequestData = NSData.init(bytes: myRequestString.cString(using: .utf8), length: myRequestString.count) as Data
        let request = NSMutableURLRequest.init(url: URL(string: urlAsString)!)
        request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "content-type")
        request.setValue(urlAsString, forHTTPHeaderField: "Referer")
        request.setValue("Mozilla/5.0 (Linux; U; Android 4.0.3; ko-kr; LG-L160L Build/IML74K) AppleWebkit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30", forHTTPHeaderField: "User-Agent")
        request.httpMethod = "POST"
        request.httpBody = myRequestData

        let requestData = URLSession.shared.dataTask(with: request as URLRequest) { (data, response, error) in
            let responseData = NSString.init(data: data!, encoding: String.Encoding.ascii.rawValue)

            if error == nil {
                print("\(responseData)")
            }

            // if request is error free then decode the json using json decoder and assigning the values to the array
            guard let data = data  else {return}
            do{
               let a = try JSONDecoder().decode([CCPaymentOption].self, from: data)

                print("\(String(describing: a))")
            }catch {
                print("Error")
            }
            }.resume()

        print("\(requestData)")
    }

这是我在调试器中得到的内容

Optional({"payOptions":[{"payOpt":"OPTCRDC","payOptDesc":"Credit Card","cardsList":"[{\"cardName\":\"Diners Club\",\"cardType\":\"CRDC\",\"payOptType\":\"OPTCRDC\",\"payOptDesc\":\"Credit Card\",\"dataAcceptedAt\":\"CCAvenue\",\"status\":\"ACTI\"},{\"cardName\":\"MasterCard\",\"cardType\":\"CRDC\",\"payOptType\":\"OPTCRDC\",\"payOptDesc\":\"Credit Card\",\"dataAcceptedAt\":\"CCAvenue\",\"status\":\"ACTI\",\"statusMessage\":\"\"},{\"cardName\":\"Visa\",\"cardType\":\"CRDC\",\"payOptType\":\"OPTCRDC\",\"payOptDesc\":\"Credit Card\",\"dataAcceptedAt\":\"CCAvenue\",\"status\":\"ACTI\"}]"},{"payOpt":"OPTDBCRD","payOptDesc":"Debit Card","cardsList":"[{\"cardName\":\"MasterCard Debit Card\",\"cardType\":\"DBCRD\",\"payOptType\":\"OPTDBCRD\",\"payOptDesc\":\"Debit Card\",\"dataAcceptedAt\":\"CCAvenue\",\"status\":\"ACTI\"},{\"cardName\":\"Visa Debit Card\",\"cardType\":\"DBCRD\",\"payOptType\":\"OPTDBCRD\",\"payOptDesc\":\"Debit Card\",\"dataAcceptedAt\":\"CCAvenue\",\"status\":\"ACTI\"}]"},{"payOpt":"OPTNBK","payOptDesc":"Net Banking","cardsList":"[{\"cardName\":\"AvenuesTest\",\"cardType\":\"NBK\",\"payOptType\":\"OPTNBK\",\"payOptDesc\":\"Net Banking\",\"dataAcceptedAt\":\"CCAvenue\",\"status\":\"ACTI\",\"statusMessage\":\"\"}]"}]})

错误

Answer 1

解码对象时需要检查许多点。

确保您的CCPaymentOption模型 addopt 协议可编码。
在解码数据时，请确保您清楚您的回复是词典或数组
假设您正在回复数组，在这种情况下，您可以直接在J SONDecoder（）。decode（）方法中使用[ CCPaymentOption]

如果您从服务器响应中获取词典，那么您需要以这种方式解码对象。
对于点号 3 的CCPaymentOption模型的
示例。

struct CCPaymentOption : Codable { var amount:String // Note down that , please use exact same // key as you are getting from server side. } do { let arrPaymentOptions = try JSONDecoder().decode([CCPaymentOption].self, from: responseData) print(arrPaymentOptions) ///... Array of Your Model reference. } catch { print(error) }
对于点号 4 的CCPaymentOption模型的
示例。

struct CCPaymentOption : Codable { var amount:String } struct responseDictionary : Codable { var paymentOption:[CCPaymentOption] // Note down that , please // use exact same key as you // are getting from server // side. } do { let responseDict = try JSONDecoder().decode(responseDictionary.self, from: responseData) print(responseDict.paymentOption) // responseDict.paymentOption is the Array of Your // Model reference. } catch { print(error) }

如果您不想使用JSON解码器，请尝试以下一项。： -

URLSession.shared.dataTask(with: request, completionHandler: { (data, response, error) in guard error == nil else { return } guard let responseData = data else { return } do { if let jsonObject = try JSONSerialization.jsonObject(with: responseData, options: []) as? [String:Any] { ///... All you want is here jsonObject is the Dictionary (required , not an optional) } } catch { print(error) } }).resume()

从服务器端获取数据后，您需要在本机方法的帮助下执行 JSONSerialization 。此方法将返回字典或数组（服务器上的取决于 响应即可。）

无法使用JSON解码器解析JSON

1 个答案: