首先使用转换响应，

export function amplify() { let key = "68a92d44-f25a-4bd8-9543-cc95369ae9a0"; return Storage.get(key + ".json",{ download: true }) .then(function(result) { return result; }) .catch(err => console.log(err)); }

转换api响应后， 然后您可以对其进行解码。

let JSON = try! JSONSerialization.data(withJSONObject: yourResponseFromApi,options: JSONSerialization.WritingOptions.prettyPrinted)

这是正确的json：

{
"status": 0,"msg": "success","data": {
    "numberOfOrder": 3256,"title_name": "URIBA DEALS","title_desc": "Deal & Discount from your nearly shops & services","deals": [{
        "DealID": "200","BusinessID": "279","DealType": "specialoffer","business_type": "vegetables","ImageURL": "","CategoryID": "1111","categoryType": "","ProductID": "0","Priority": "-48","Status": "1","CreatedAt": "2019-11-19 07:57:32","PromoCode": "","Offer": "0","OfferType": "0","Branch": "Kharadi(EON)","NewLogo": "http://aiotechnology.in/AmanoraKatta/AdminPanel/deals_new_img/1574148777.jpg","userAcquisitionStatus": "0","maxOrder": "0","minOrder": "0","userAcquisitionDiscount": "0","dealFrom": "0000-00-00 00:00:00","dealTo": "0000-00-00 00:00:00","deal_description": "Onion @ Rs 17 half kg (Pick Onion From Amanora Office) ( limit 1 kg per person )","from_time": "00:00:00","to_time": "00:00:00","from_date": "0000-00-00","to_date": "0000-00-00","deal_delivery_charges": "9","app_Version": "0","walletAmount": "0","name": "UriBA Vegetables Kharadi","delivery_status_flag": "0","delivery_days_after": "1","business_address": "Kharadi,Pune","min_order_amt": "12","latitude": "18.5578469","longitude": "73.9449945","delivery_timings": "9 AM to 9 PM","CST": "0","GST": "0","DELI_CHRGS": "0","PACK_CHRGS": "2","displayimage": "1571221633.jpg","logo_icon": "","business_margin": "0","business_margin_flag": "0"

    }]
}
}

这是模型：

// This file was generated from JSON Schema using quicktype,do not modify it directly.
// To parse the JSON,add this file to your project and do:
//
//   let dealModel = try? newJSONDecoder().decode(DealModel.self,from: jsonData)

//
// To parse values from Alamofire responses:
//
//   Alamofire.request(url).responseDealModel { response in
//     if let dealModel = response.result.value {
//       ...
//     }
//   }

import Foundation
import Alamofire

// MARK: - DealModel
class DealModel: Codable {
let status: Int?
let msg: String?
let data: DataClass?

init(status: Int?,msg: String?,data: DataClass?) {
    self.status = status
    self.msg = msg
    self.data = data
}
}

//
// To parse values from Alamofire responses:
//
//   Alamofire.request(url).responseDataClass { response in
//     if let dataClass = response.result.value {
//       ...
//     }
//   }

// MARK: - DataClass
class DataClass: Codable {
let numberOfOrder: Int?
let titleName,titleDesc: String?
let deals: [Deal]?

enum CodingKeys: String,CodingKey {
    case numberOfOrder
    case titleName = "title_name"
    case titleDesc = "title_desc"
    case deals
}

init(numberOfOrder: Int?,titleName: String?,titleDesc: String?,deals: [Deal]?) {
    self.numberOfOrder = numberOfOrder
    self.titleName = titleName
    self.titleDesc = titleDesc
    self.deals = deals
}
}

//
// To parse values from Alamofire responses:
//
//   Alamofire.request(url).responseDeal { response in
//     if let deal = response.result.value {
//       ...
//     }
//   }

// MARK: - Deal
class Deal: Codable {
let dealID,businessID,dealType,businessType: String?
let imageURL,categoryID,categoryType,productID: String?
let priority,status,createdAt,promoCode: String?
let offer,offerType,branch: String?
let newLogo: String?
let userAcquisitionStatus,maxOrder,minOrder,userAcquisitionDiscount: String?
let dealFrom,dealTo,dealDescription,fromTime: String?
let toTime,fromDate,toDate,dealDeliveryCharges: String?
let appVersion,walletAmount,name,deliveryStatusFlag: String?
let deliveryDaysAfter,businessAddress,minOrderAmt,latitude: String?
let longitude,deliveryTimings,cst,gst: String?
let deliChrgs,packChrgs,displayimage,logoIcon: String?
let businessMargin,businessMarginFlag: String?

enum CodingKeys: String,CodingKey {
    case dealID = "DealID"
    case businessID = "BusinessID"
    case dealType = "DealType"
    case businessType = "business_type"
    case imageURL = "ImageURL"
    case categoryID = "CategoryID"
    case categoryType
    case productID = "ProductID"
    case priority = "Priority"
    case status = "Status"
    case createdAt = "CreatedAt"
    case promoCode = "PromoCode"
    case offer = "Offer"
    case offerType = "OfferType"
    case branch = "Branch"
    case newLogo = "NewLogo"
    case userAcquisitionStatus,userAcquisitionDiscount,dealFrom,dealTo
    case dealDescription = "deal_description"
    case fromTime = "from_time"
    case toTime = "to_time"
    case fromDate = "from_date"
    case toDate = "to_date"
    case dealDeliveryCharges = "deal_delivery_charges"
    case appVersion = "app_Version"
    case walletAmount,name
    case deliveryStatusFlag = "delivery_status_flag"
    case deliveryDaysAfter = "delivery_days_after"
    case businessAddress = "business_address"
    case minOrderAmt = "min_order_amt"
    case latitude,longitude
    case deliveryTimings = "delivery_timings"
    case cst = "CST"
    case gst = "GST"
    case deliChrgs = "DELI_CHRGS"
    case packChrgs = "PACK_CHRGS"
    case displayimage
    case logoIcon = "logo_icon"
    case businessMargin = "business_margin"
    case businessMarginFlag = "business_margin_flag"
}

init(dealID: String?,businessID: String?,dealType: String?,businessType: String?,imageURL: String?,categoryID: String?,categoryType: String?,productID: String?,priority: String?,status: String?,createdAt: String?,promoCode: String?,offer: String?,offerType: String?,branch: String?,newLogo: String?,userAcquisitionStatus: String?,maxOrder: String?,minOrder: String?,userAcquisitionDiscount: String?,dealFrom: String?,dealTo: String?,dealDescription: String?,fromTime: String?,toTime: String?,fromDate: String?,toDate: String?,dealDeliveryCharges: String?,appVersion: String?,walletAmount: String?,name: String?,deliveryStatusFlag: String?,deliveryDaysAfter: String?,businessAddress: String?,minOrderAmt: String?,latitude: String?,longitude: String?,deliveryTimings: String?,cst: String?,gst: String?,deliChrgs: String?,packChrgs: String?,displayimage: String?,logoIcon: String?,businessMargin: String?,businessMarginFlag: String?) {
    self.dealID = dealID
    self.businessID = businessID
    self.dealType = dealType
    self.businessType = businessType
    self.imageURL = imageURL
    self.categoryID = categoryID
    self.categoryType = categoryType
    self.productID = productID
    self.priority = priority
    self.status = status
    self.createdAt = createdAt
    self.promoCode = promoCode
    self.offer = offer
    self.offerType = offerType
    self.branch = branch
    self.newLogo = newLogo
    self.userAcquisitionStatus = userAcquisitionStatus
    self.maxOrder = maxOrder
    self.minOrder = minOrder
    self.userAcquisitionDiscount = userAcquisitionDiscount
    self.dealFrom = dealFrom
    self.dealTo = dealTo
    self.dealDescription = dealDescription
    self.fromTime = fromTime
    self.toTime = toTime
    self.fromDate = fromDate
    self.toDate = toDate
    self.dealDeliveryCharges = dealDeliveryCharges
    self.appVersion = appVersion
    self.walletAmount = walletAmount
    self.name = name
    self.deliveryStatusFlag = deliveryStatusFlag
    self.deliveryDaysAfter = deliveryDaysAfter
    self.businessAddress = businessAddress
    self.minOrderAmt = minOrderAmt
    self.latitude = latitude
    self.longitude = longitude
    self.deliveryTimings = deliveryTimings
    self.cst = cst
    self.gst = gst
    self.deliChrgs = deliChrgs
    self.packChrgs = packChrgs
    self.displayimage = displayimage
    self.logoIcon = logoIcon
    self.businessMargin = businessMargin
    self.businessMarginFlag = businessMarginFlag
}
} 

// MARK: - Helper functions for creating encoders and decoders

func newJSONDecoder() -> JSONDecoder {
let decoder = JSONDecoder()
if #available(iOS 10.0,OSX 10.12,tvOS 10.0,watchOS 3.0,*) {
    decoder.dateDecodingStrategy = .iso8601
}
return decoder
}

func newJSONEncoder() -> JSONEncoder {
let encoder = JSONEncoder()
if #available(iOS 10.0,*) {
    encoder.dateEncodingStrategy = .iso8601
}
return encoder
}

// MARK: - Alamofire response handlers

extension DataRequest {
fileprivate func decodableResponseSerializer<T: Decodable>() -> DataResponseSerializer<T> {
    return DataResponseSerializer { _,response,data,error in
        guard error == nil else { return .failure(error!) }

        guard let data = data else {
            return .failure(AFError.responseSerializationFailed(reason: .inputDataNil))
        }

        return Result { try newJSONDecoder().decode(T.self,from: data) }
    }
}

@discardableResult
fileprivate func responseDecodable<T: Decodable>(queue: DispatchQueue? = nil,completionHandler: @escaping (DataResponse<T>) -> Void) -> Self {
    return response(queue: queue,responseSerializer: decodableResponseSerializer(),completionHandler: completionHandler)
}

@discardableResult
func responseDealModel(queue: DispatchQueue? = nil,completionHandler: @escaping (DataResponse<DealModel>) -> Void) -> Self {
    return responseDecodable(queue: queue,completionHandler: completionHandler)
}
}

像这样呼叫almofire请求

Alamofire.request(url,method:.post,parameters: parameters,headers: headers)
        .responseDealModel(completionHandler: { (response) in
            switch response.result {
            case .success(let result):
                print("success")
            case .failure(let error):
                print("fail")
            }
        })
        .responseString { (response) in
            print(response.result.value ?? "NO Response")
    }

用户https://jsonlint.com/验证用于创建模型的json和quicktype。