如何使用Alamofire从数组中获取数据以在CollectionCell中显示？

Question

我正在创建一个需要从API提取数据的应用程序，场景是，我将在下面获取json数据：

[
  {
    "chargeId": "33fbbbd0-2e33-11e9-a2cb-8a27ecbbcb73",
    "chargeDate": "2019-02-12T03:28:44.000",
    "vatRate": "NON-VAT",
    "taxRate": 0.1,
    "policyGroup": "Patient Participation",
    "itemDescription": "Ecg at er/icu df",
    "scdFlag": 0,
    "amounts": null,
    "scdDiscounts": 0,
    "othDiscounts": 4.54,
    "adjustment": 0,
    "pfBill": 222.46,
    "vatAmount": 0,
    "taxableAmount": 11.12,
    "merchantDiscount": 0,
    "creditedAmount": 211.3,
    "chargeAmount": null,
    "previousCredits": null
},
{
    "chargeId": "5a2cabc1-46c9-11e9-a2cf-863c7cdffd18",
    "chargeDate": "2019-03-15T10:24:21.000",
    "vatRate": "NON-VAT",
    "taxRate": 0.1,
    "policyGroup": "Patient Participation",
    "itemDescription": "Professional Fees",
    "scdFlag": 0,
    "amounts": null,
    "scdDiscounts": 0,
    "othDiscounts": 0,
    "adjustment": 0,
    "pfBill": 1000,
    "vatAmount": 0,
    "taxableAmount": 100,
    "merchantDiscount": 0,
    "creditedAmount": 900,
    "chargeAmount": null,
    "previousCredits": null
  }
 ]

我确实使用下面的Alamofire代码成功提取了数据：

    typealias getPatientDetailsPerPayoutTaskCompletion = (_ patientDetailsPerPayout: [PatientPayoutDetails]?, _ error: NetworkError?) -> Void

  static func getPatientDetailsPerPayout(periodId: Int, doctorNumber: String, parameterName: PatientParameter, hospitalNumber: String, completion: @escaping getPatientDetailsPerPayoutTaskCompletion) {


        guard let patientDetailsPerPayoutURL = URL(string: "\(Endpoint.Patient.patientPayoutDetails)?periodId=\(periodId)&doctorNumber=\(doctorNumber)\(parameterName.rawValue)\(hospitalNumber)") else {

            completion(nil, .invalidURL)
            return
        }

        let sessionManager = Alamofire.SessionManager.default
        sessionManager.session.getAllTasks { (tasks) in
            tasks.forEach({ $0.cancel() })
        }

        Alamofire.request(patientDetailsPerPayoutURL, method: .get, encoding: JSONEncoding.default).responseJSON { (response) in
            print(patientDetailsPerPayoutURL)
            guard HelperMethods.reachability(responseResult: response.result) else {
                completion(nil, .noNetwork)
                return
            }

            guard let statusCode = response.response?.statusCode else {
                completion(nil, .noStatusCode)
                return
            }

            switch(statusCode) {
            case 200:
                guard let jsonData = response.data else {
                    completion(nil, .invalidJSON)
                    return
                }

                let decoder = JSONDecoder()

                do {
                    let patientDetailsPayout = try decoder.decode([PatientPayoutDetails].self, from: jsonData)
                    completion(patientDetailsPayout, nil)
                } catch {
                    completion(nil, .invalidJSON)
                }

            case 400: completion(nil, .badRequest)
            case 404: completion(nil, .noRecordFound)
            default:
                print("**UNCAPTURED STATUS CODE FROM (getPatientDetailsPayout)\nSTATUS CODE: \(statusCode)")
                completion(nil, .uncapturedStatusCode)
            }
        }

JSON Data将显示在CollectionCell ，并且用户将轻按该cell以查看一个chargedId下的数据，但是不幸的是，当我轻按该cell ，所有数据都被拉出，而不仅仅是数组的一部分。 下面的代码是我用来提取数组的一部分的代码：

typealias getSelectedPatientItemDetailsTaskCompletion = (_ selectedpatient: PatientPaymentDetails?, _ error: NetworkError?) -> Void

static func getPatientItemDetails(periodId: Int, doctorNumber: String, parameterName: PatientParameter, hospitalNumber: String, chargeId: String, completion: @escaping getSelectedPatientItemDetailsTaskCompletion) {


    guard let patientDetailsPerPayoutURL = URL(string: "\(Endpoint.Patient.patientPayoutDetails)?periodId=\(periodId)&doctorNumber=\(doctorNumber)\(parameterName.rawValue)\(hospitalNumber)") else {

    completion(nil, .invalidURL)
    return
    }

    let sessionManager = Alamofire.SessionManager.default
    sessionManager.session.getAllTasks { (tasks) in
    tasks.forEach({ $0.cancel() })
    }

    Alamofire.request(patientDetailsPerPayoutURL, method: .get, encoding: JSONEncoding.default).responseJSON { (response) in
    print(patientDetailsPerPayoutURL)

    guard HelperMethods.reachability(responseResult: response.result) else {
    completion(nil, .noNetwork)
    return
    }

    guard let statusCode = response.response?.statusCode else {
    completion(nil, .noStatusCode)
    return
    }

    switch(statusCode) {
    case 200:
    guard let jsonData = response.data else {
   completion(nil, .invalidJSON)
    return
   }

   let decoder = JSONDecoder()

   do {
    let patientDetailsPayout = try decoder.decode(PatientPaymentDetails.self, from: jsonData)
   completion(patientDetailsPayout, nil)
   } catch {
  completion(nil, .invalidJSON)
   }

    case 400: completion(nil, .badRequest)
    case 404: completion(nil, .noRecordFound)
    default:
    print("**UNCAPTURED STATUS CODE FROM (getPatientDetailsPayout)\nSTATUS CODE: \(statusCode)")
    completion(nil, .uncapturedStatusCode)
                }
            }
        }
    }
}

Didselect函数提取数据

switch indexPath.section {
    case 0:
       self.selectedCardIndex = indexPath
       let selectedItem = selectedItemDescription.id
       getItemDetails(parameter: .searchByChargedId, from: selectedItem)
        let cardController = UserCardViewController.init(nibName: "UserCardViewController", bundle: nil)

        present(cardController, animated: true, completion: nil)

    default: break
        }
    }

getItemDetails函数

 func getItemDetails(parameter: PatientParameter, from: String) {

 APIService.PatientList.getPatientItemDetails(periodId: currentRemittance.periodId, doctorNumber: doctorNumber, parameterName: parameter, hospitalNumber: patient.hospitalNumber!, chargeId: from) { (getItem, error) in

        guard let pageItemDescription = getItem, error == nil else {
            SVProgressHUD.dismiss()
            return
        }

        switch parameter {
        case .selectedByChargedID:
            if self.patientPayoutDetails == nil {
                self.selectedPatientItemDescription = pageItemDescription
            }else {
                self.patientPayoutDetails.append(contentsOf: pageItemDescription.chargedId)
            }

        default: break
        }
        SVProgressHUD.dismiss()

        }
} 

希望您能为我提供帮助，对不起，如果我包含了几乎所有代码，但我只想向您展示代码的流程。 进行了将近1周的工作。 谢谢。

Answer 1

您的两个函数getPatientItemDetails和getPatientDetailsPerPayout都从同一URL检索数据：

guard let patientDetailsPerPayoutURL = URL(string: "\(Endpoint.Patient.patientPayoutDetails)?periodId=\(periodId)&doctorNumber=\(doctorNumber)\(parameterName.rawValue)\(hospitalNumber)") else {

对于不同的端点，您可能具有不同的URL； 验证这两种方法的URL，确保您使用适当的方法。