How to parse JSON response from Alamofire API in Swift

Question

Following code I have written and I am getting response in JSON also but the type of JSON is  AnyObject  and I am not able to convert that into Array so that I can use that   Alamofire request  POST   MY URL   parameters parameters  encoding   JSON   responseJSON        request  response  JSON  error  in      println JSON

User · Answer

I m neither a JSON expert nor a Swift expert  but the following is working for me     I have extracted the code from my current app  and only changed  MyLog to println   and indented with spaces to get it to show as a code block  hopefully I didn t break it    func getServerCourseVersion         Alamofire request  GET    PUBLIC URL  vtcver php            responseJSON         JSON     in           if let jsonResult   JSON as  Array lt Dictionary lt String String gt  gt                let courseName   jsonResult 0   courseName               let courseVersion   jsonResult 0   courseVersion               let courseZipFile   jsonResult 0   courseZipFile                println  JSON     courseName    courseName                println  JSON  courseVersion    courseVersion                println  JSON  courseZipFile    courseZipFile                             Hope this helps   Edit   For reference  here is what my PHP Script returns      courseName    Training Title   courseVersion    1 01   courseZipFile    101 files zip

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The answer for Swift 2 0 Alamofire 3 0 should actually look more like this   Alamofire request  POST  url  parameters  parameters  encoding  JSON  responseJSON   response in switch response result                   case  Success let JSON                       print  Success with JSON    JSON                         let response   JSON as  NSDictionary                        example if there is an id                     let userId   response objectForKey  id                     case  Failure let error                       print  Request failed with error    error                              https   github com Alamofire Alamofire blob master Documentation Alamofire 203 0 20Migration 20Guide md  UPDATE for Alamofire 4 0 and Swift 3 0    Alamofire request url  method   post  parameters  parameters  encoding  JSONEncoding default               responseJSON   response in                 print response    to get status code                 if let status   response response  statusCode                       switch status                       case 201                          print  example success                       default                          print  error with response status    status                                              to get JSON return value             if let result   response result value                   let JSON   result as  NSDictionary                 print JSON

User · Answer

This was build with Xcode 10 1 and Swift 4  Perfect combination  Alamofire  4 8 1  and  SwiftyJSON  4 2 0   First you should install both pods     pod  Alamofire  and pod  SwiftyJSON    The  server response in JSON format        args           headers          Accept                Accept-Encoding    gzip q 1 0  compress q 0 5         Accept-Language    en q 1 0         Host    httpbin org         User-Agent    AlamoFire TEST 1 0  com ighost AlamoFire-TEST  build 1  iOS 12 1 0  Alamofire 4 8 1           origin    200 55 140 181  200 55 140 181       url    https   httpbin org get      In this case I want print the  Host  info    Host    httpbin org    Alamofire request  https   httpbin org get   validate   responseJSON   response in         switch response result           case  success              print  Validation Successful                 if let json   response data                   do                      let data   try JSON data  json                      let str   data  headers    Host                       print  DATA PARSED    str                                      catch                  print  JSON Error                                            case  failure let error               print error                    Keep Calm and happy Code

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Swift 5  class User  Decodable        var name  String     var email  String     var token  String      enum CodingKeys  String  CodingKey           case name         case email         case token            public required init from decoder  Decoder  throws           let container   try decoder container keyedBy  CodingKeys self          self name   try container decode String self  forKey   name          self email   try container decode String self  forKey   email          self token   try container decode String self  forKey   token            Alamofire API      Alamofire request  url endpoint path   method   get  parameters  params  encoding  URLEncoding queryString  headers  nil        validate         responseJSON   response in          switch  response result                 case  success                   do                   let users   try JSONDecoder   decode  User  self  from  response data                   print users                 catch let error as NSError                   print  Failed to load    error localizedDescription                                case  failure let error                   print  Request error    error localizedDescription

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I usually use Gloss library to serialize or deserialize JSON in iOS  For example  I have JSON that looks like this     ABDC     AB   qwerty   CD   uiop       AB   12334   CD   asdf       First  I model the JSON array in Gloss struct   Struct Struct Name  Decodable      let IJ  String     let KL  String     init  json  JSON          self IJ    AB   lt    json        self KL    CD   lt    json          And then in Alamofire responseJSON  I do this following thing   Alamofire request url  method   get  paramters  parametersURL  validate contentType    application json    responseJSON  response in  switch response result     case  success  let data       guard let value   data as  JSON         let eventsArrayJSON   value  ABDC   as   JSON      else   fatalError         let struct name    Struct Name  from jsonArray  eventsArrayJSON   the JSON deserialization is done here  after this line you can do anything with your JSON     for i in 0    lt  Int  struct name  count             print  struct name  i  IJ            print  struct name  i  KL               break     case  failure let error       print  Error    error        break        The output from the code above   qwerty uiop 1234 asdf

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swift 3  pod  Alamofire      gt  4 4  pod  SwiftyJSON   File json format         codeAd              dateExpire    2017 12 11            codeRemoveAd   1231243134               import Alamofire import SwiftyJSON     private func downloadJson             Alamofire request  https   yourlinkdownloadjson abc   responseJSON   response in             debugPrint response               if let json   response data                   let data   JSON data  json                  print  data  data  codeAd    dateExpire                      print  data  data  codeAd    codeRemoveAd

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in swift 5 we do like  Use typealias for the completion  Typlealias nothing just use to clean the code   typealias response    Bool Any  - gt      static func postCall   url   String  param    String   Any  completion    escaping response       Alamofire request url  method   post  parameters  param  encoding  JSONEncoding default  headers       responseJSON    response  in          switch response result              case  success let JSON                  print   n n Success value and JSON    JSON                case  failure let error                  print   n n Request failed with error    error

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I found a way to convert the response result value  inside an Alamofire responseJSON closure  into JSON format that I use in my app    I m using Alamofire 3 and Swift 2 2   Here s the code I used       Alamofire request  POST  requestString                        parameters  parameters                        encoding   JSON                        headers  headers  validate statusCode  200   lt 303                                          validate contentType    application json                                            responseJSON    response  in         NSLog  response     response             switch response result           case  Success              guard let resultValue   response result value else                   NSLog  Result value in response is nil                   completionHandler response  nil                  return                            let responseJSON   JSON resultValue                  I do any processing this function needs to do with the JSON here                 Here I call a completionHandler I wrote for the success case         break         case  Failure let error               NSLog  Error result    error                   Here I call a completionHandler I wrote for the failure case             return

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Swift 3  Alamofire 4 4  and SwiftyJSON   Alamofire request url  method   get     responseJSON   response in       if response data    nil           let json   JSON data  response data           let name   json  people   0   name   string         if name    nil             print name                           That will parse this JSON input       people          name   John           name   Dave

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I found the answer on GitHub for Swift2  https   github com Alamofire Alamofire issues 641  Alamofire request  GET  URLString  parameters    foo    bar         responseJSON   request  response  result in         switch result           case  Success let JSON               print  Success with JSON    JSON             case  Failure let data  let error               print  Request failed with error    error                 if let data   data                   print  Response data    NSString data  data  encoding  NSUTF8StringEncoding

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like above mention you can use SwiftyJSON library and get your values like i have done below   Alamofire request  POST   MY URL   parameters parameters  encoding   JSON   responseJSON        request  response  data  error  in  var json   JSON data  data           println json            println json  productList   1                         my json product list return from script     productList        productName     PIZZA   id     1   productRate     120 00   productDescription     PIZZA AT 120Rs   productImage     uploads  pizza jpeg       productName     BURGER   id     2   productRate     100 00   productDescription     BURGER AT Rs 100   productImage     uploads Burgers jpg               output         productName     BURGER      id     2      productRate     100 00      productDescription     BURGER AT Rs 100      productImage     uploads Burgers jpg

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pod  Alamofire   pod  SwiftyJSON   pod  ReachabilitySwift     import UIKit import Alamofire import SwiftyJSON import SystemConfiguration  class WebServiceHelper  NSObject        typealias SuccessHandler    JSON  - gt  Void     typealias FailureHandler    Error  - gt  Void         MARK  - Internet Connectivity      class func isConnectedToNetwork   - gt  Bool            var zeroAddress   sockaddr in           zeroAddress sin len   UInt8 MemoryLayout lt sockaddr in gt  size          zeroAddress sin family   sa family t AF INET           guard let defaultRouteReachability   withUnsafePointer to   amp zeroAddress                 0 withMemoryRebound to  sockaddr self  capacity  1                    SCNetworkReachabilityCreateWithAddress nil   0                           else               return false                    var flags  SCNetworkReachabilityFlags              if  SCNetworkReachabilityGetFlags defaultRouteReachability   amp flags                return false                    let isReachable   flags contains  reachable          let needsConnection   flags contains  connectionRequired           return  isReachable  amp  amp   needsConnection                MARK  - Helper Methods      class func getWebServiceCall   strURL   String  isShowLoader   Bool  success    escaping SuccessHandler  failure    escaping FailureHandler                if isConnectedToNetwork                  print strURL               if isShowLoader    true                    AppDelegate getDelegate   showLoader                              Alamofire request strURL  responseJSON    resObj  - gt  Void in                  print resObj                   if resObj result isSuccess                       let resJson   JSON resObj result value                        if isShowLoader    true                           AppDelegate getDelegate   dismissLoader                                              debugPrint resJson                      success resJson                                    if resObj result isFailure                       let error   Error   resObj result error                       if isShowLoader    true                           AppDelegate getDelegate   dismissLoader                                             debugPrint error                      failure error                                           else                 CommonMethods showAlertWithError     strMessage  Messages NO NETWORK  withTarget   AppDelegate getDelegate   window  rootViewController                         class func getWebServiceCall   strURL   String  params    String   AnyObject    isShowLoader   Bool  success    escaping SuccessHandler   failure   escaping FailureHandler           if isConnectedToNetwork                  if isShowLoader    true                   AppDelegate getDelegate   showLoader                               Alamofire request strURL  method   get  parameters  params  encoding  JSONEncoding default  headers  nil  responseJSON completionHandler    resObj  - gt  Void in                  print resObj                   if resObj result isSuccess                       let resJson   JSON resObj result value                        if isShowLoader    true                           AppDelegate getDelegate   dismissLoader                                              success resJson                                    if resObj result isFailure                       let error   Error   resObj result error                       if isShowLoader    true                           AppDelegate getDelegate   dismissLoader                                              failure error                                                  else                CommonMethods showAlertWithError     strMessage  Messages NO NETWORK  withTarget   AppDelegate getDelegate   window  rootViewController                        class func postWebServiceCall   strURL   String  params    String   AnyObject    isShowLoader   Bool  success    escaping SuccessHandler  failure   escaping FailureHandler                if isConnectedToNetwork                          if isShowLoader    true                               AppDelegate getDelegate   showLoader                              Alamofire request strURL  method   post  parameters  params  encoding  JSONEncoding default  headers  nil  responseJSON completionHandler    resObj  - gt  Void in                  print resObj                   if resObj result isSuccess                                       let resJson   JSON resObj result value                        if isShowLoader    true                                               AppDelegate getDelegate   dismissLoader                                              success resJson                                     if resObj result isFailure                                       let error   Error   resObj result error                       if isShowLoader    true                                               AppDelegate getDelegate   dismissLoader                                              failure error                                            else               CommonMethods showAlertWithError     strMessage  Messages NO NETWORK  withTarget   AppDelegate getDelegate   window  rootViewController                          class func postWebServiceCallWithImage   strURL   String  image   UIImage   strImageParam   String  params    String   AnyObject    isShowLoader   Bool  success    escaping SuccessHandler  failure    escaping FailureHandler                if isConnectedToNetwork                 if isShowLoader    true                               AppDelegate getDelegate   showLoader                              Alamofire upload                  multipartFormData    multipartFormData in                     if let imageData   UIImageJPEGRepresentation image  0 5                            multipartFormData append imageData  withName   Image jpg                                              for  key  value  in params                             let data   value as  String                          multipartFormData append data data using  String Encoding utf8    withName  key                          print multipartFormData                                                           to  strURL                  encodingCompletion    encodingResult in                     switch encodingResult                       case  success let upload                                 upload responseJSON   response in                             debugPrint response                                let datastring   String data  response  encoding  String Encoding utf8                                print datastring                                                case  failure let encodingError                           print encodingError                          if isShowLoader    true                                                       AppDelegate getDelegate   dismissLoader                                                      let error   NSError   encodingError as NSError                         failure error                                             switch encodingResult                       case  success let upload                                 upload responseJSON    response  - gt  Void in                              if response result isSuccess                                                               let resJson   JSON response result value                                    if isShowLoader    true                                                                       AppDelegate getDelegate   dismissLoader                                                                      success resJson                                                             if response result isFailure                                                               let error   Error   response result error  as Error                                  if isShowLoader    true                                                                       AppDelegate getDelegate   dismissLoader                                                                      failure error                                                                               case  failure let encodingError                           if isShowLoader    true                                                       AppDelegate getDelegate   dismissLoader                                                      let error   NSError   encodingError as NSError                         failure error                                                                          else                       CommonMethods showAlertWithError     strMessage  Messages NO NETWORK  withTarget   AppDelegate getDelegate   window  rootViewController                                                              Call Method   let aParams    String   String                       ReqCode    Constants kRequestCodeLogin                                 WebServiceHelper postWebServiceCall Constants BaseURL  params  aParams as  String   AnyObject    isShowLoader  true  success     responceObj  in                   if    responceObj  RespCode         1                                        let alert   UIAlertController title  Constants kAppName  message     responceObj  RespMsg      preferredStyle  UIAlertControllerStyle alert                      let OKAction   UIAlertAction title   OK   style   default     action UIAlertAction   in                                           alert addAction OKAction                      self present alert  animated  true  completion  nil                                    else                                       let aParams    String   String                               Password    self dictAddLogin AddLoginConstants kPassword                                                  CommonMethods saveCustomObject aParams as AnyObject   key  Constants kLoginData                                        failure                     error  in                      CommonMethods showAlertWithError Constants kALERT TITLE Error  strMessage  error localizedDescription withTarget   AppDelegate getDelegate   window  rootViewController

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