swiftyJson returns null in nested json - ios

Question

I'm using this function to send post values to server:
func getFirstPageApplication(EMPTY:String,completionHandler: #escaping (_ response: String) -> ())
{
var strResponse = "null"
var request = URLRequest(url: URL(string: self.baseURL+"getFirstPageApplication")!)
request.httpMethod = "POST"
let postString = "EMAIL=\(EMPTY)"
request.httpBody = postString.data(using: .utf8)
let task = URLSession.shared.dataTask(with: request) { data, response, error in
guard let data = data, error == nil else { // check for fundamental networking error
print("error=\(error)")
return
}
if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 { // check for http errors
print("statusCode should be 200, but is \(httpStatus.statusCode)")
print("response = \(response)")
}
let responseString = String(data: data, encoding: .utf8)
strResponse = responseString!
completionHandler(strResponse)
}
task.resume()
}
in my other controller I use this function to use above method:
func initialFirstView()
{
RestApiManager.sharedInstance.getFirstPageApplication(EMPTY:"-"){
response in
let json = JSON(response)
print("res: \(json["sliders"])")
}
}
I got response value but json["sliders"] returns null, I don't know!
my response value:
{"sliders":[{"id":4,"title":"\u0647\u0645\u06cc\u0634\u0647 \u0628\u0647 \u0622\u0648\u0627\u0632 \u0628\u0627 \u0627\u0633\u062a\u0627\u062f\u06a9\u062a","image":"1500801181_ostadcat_slider_1.jpg","status":1,"created_at":"2017-07-23 04:43:01","updated_at":"2017-07-23 04:43:01"},{"id":6,"title":"\u06cc\u06a9\u06cc \u0628\u0631\u0627\u06cc \u0647\u0645\u0647, \u0647\u0645\u0647 \u0628\u0631\u0627\u06cc \u06cc\u06a9\u06cc","image":"1500801699_ostadcat_slider_3.jpg","status":1,"created_at":"2017-07-23 04:51:39","updated_at":"2017-07-23 04:51:39"},{"id":7,"title":"\u062d\u0631\u0641\u0647 \u0627\u06cc \u062a\u0631\u06cc\u0646 \u0627\u067e\u0644\u06cc\u06a9\u06cc\u0634\u0646 \u0645\u0648\u0633\u06cc\u0642\u06cc","image":"1500801728_ostadcat_slider_4.jpg","status":1,"created_at":"2017-07-23 04:52:08","updated_at":"2017-07-23 04:52:08"},{"id":8,"title":"\u062a\u0648 \u0647\u0645 \u0645\u06cc \u062a\u0648\u0646\u06cc \u0645\u062b\u0644 \u0645\u0646 \u0628\u0627\u0634\u06cc!!!","image":"1500801751_ostadcat_slider_2.jpg","status":1,"created_at":"2017-07-23 04:52:31","updated_at":"2017-07-23 04:52:31"}],"tutorials":[{"id":1,"home_image":"1500806287_img_home_test_6.png","tutorial_image":"1500809220_Hot-Romanian-Inna-in-black-goggles-wallpapers.jpg","tutorial_title":"\u062e\u0648\u0627\u0646\u0646\u062f\u06af\u06cc","tutorial_description":"\u0622\u0645\u0648\u0632\u0634 \u062c\u0627\u0645\u0639 \u062e\u0648\u0627\u0646\u0646\u062f\u06af\u06cc","video":"1500810916_innaHot2.mp4","video_title":"\u062e\u0648\u0627\u0646\u0646\u062f\u06af\u06cc \u0631\u0627 \u062d\u0631\u0641\u0647 \u0627\u06cc \u06cc\u0627\u062f \u0628\u06af\u06cc\u0631\u06cc\u062f","teacher_image":"1500808975_inna-dark-hair-white-dresses-digital-art.jpg","teacher_name":"\u0627\u06cc\u0646\u0627","teacher_bio":"\u0628\u0647\u062a\u0631\u06cc\u0646 \u0627\u0632 \u0633\u0627\u0644 2009 \u062a\u0627 \u0628\u0647 \u0627\u0644\u0627\u0646","status":1,"created_at":"2017-06-29 17:31:20","updated_at":"2017-07-23 11:55:16"},{"id":2,"home_image":"1500802877_img_home_test_1.jpg","tutorial_image":"1500802877_Image.png","tutorial_title":"\u0622\u0645\u0648\u0632\u0634 \u06af\u06cc\u062a\u0627\u0631 \u0627\u0633\u0644\u0634","tutorial_description":"\u06af\u06cc\u062a\u0627\u0631 \u0627\u0633\u0644\u0634 \u0631\u0627 \u06cc\u0627\u062f \u0628\u06af\u06cc\u0631\u06cc\u062f!!!","video":"1500804433_oneRepublic.mp4","video_title":"\u0646\u0645\u0648\u0646\u0647 \u0622\u0645\u0648\u0632\u0634 \u06af\u06cc\u062a\u0627\u0631","teacher_image":"1500802882_maxresdefault.jpg","teacher_name":"\u0648\u0627\u0646 \u0631\u06cc\u067e\u0627\u0628\u0644\u06cc\u06a9","teacher_bio":"\u06af\u0631\u0648\u0647 \u0648\u0627\u0646 \u0631\u06cc\u067e\u0627\u0628\u0644\u06cc\u06a9 \u0634\u0627\u0645\u0644 5 \u0639\u0636\u0648","status":1,"created_at":"2017-06-29 17:35:09","updated_at":"2017-07-23 05:37:13"}]}
#Reinier Melian
solved:
func getFirstPageApplication(EMPTY:String,completionHandler: #escaping (_ response: AnyObject) -> ())
{
var strResponse = "null"
var request = URLRequest(url: URL(string: self.baseURL+"getFirstPageApplication")!)
request.httpMethod = "POST"
let postString = "EMAIL=\(EMPTY)"
request.httpBody = postString.data(using: .utf8)
let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
if error != nil {
DispatchQueue.main.async {
completionHandler({} as AnyObject)
}
} else {
if let usableData = data {
do {
let jsonResult = try JSONSerialization.jsonObject(with: usableData, options:
JSONSerialization.ReadingOptions.mutableContainers)
//print("worked")
//print(jsonResult) //this part works fine
DispatchQueue.main.async {
completionHandler(jsonResult as AnyObject)
}
} catch {
DispatchQueue.main.async {
completionHandler({} as AnyObject)
}
print("JSON Processing Failed")
}
}
}
}
task.resume()
}

Answer 1

Try using AnyObject instead of String in your completion handler and add JSONSerialization to serialize to json
func getFirstPageApplication(EMPTY:String,completionHandler: #escaping (_ response: AnyObject) -> ())
{
var strResponse = "null"
var request = URLRequest(url: URL(string: self.baseURL+"getFirstPageApplication")!)
request.httpMethod = "GET"
let postString = "EMAIL=\(EMPTY)"
request.httpBody = postString.data(using: .utf8)
let task = URLSession.shared.dataTask(with: request) { data, response, error in
guard let data = data, error == nil else { // check for fundamental networking error
print("error=\(error)")
return
}
if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 { // check for http errors
print("statusCode should be 200, but is \(httpStatus.statusCode)")
print("response = \(response)")
}
do {
let json:AnyObject? = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? NSDictionary
if let parseJSON = json{
print(parseJSON)
}
completionHandler(parseJSON)
}
}
task.resume()
}
Then you must be able to use this without problems
func initialFirstView()
{
RestApiManager.sharedInstance.getFirstPageApplication(EMPTY:"-"){
response in
print("res: \(response["sliders"])")
}
}
This code is not tested, so please let me know if works
Hope this helps