Issue with parsing json using Alamofire - ios

Question

My JSON response in postman looks like this...
{
"success": 1,
"Details": {
"seller_id": "165",
"mobile_no": "9653265987",
"seller_name": "User A",
"seller_email_id": "user#gmail.com",
"company_name": "myCompany",
"category": "Cosmetics",
"otp": "1111"
},
"message": "Seller Already Registered!!!"
}
Now I wanted to give a condition based on whether success is 0 or 1 and so for that I wanted to extract success. Also I want to extract mobile number. But I am not able figure out how to do that.
This is how I am making my Alamofire post request...
Alamofire.request(url, method: .post, parameters: Parameters, encoding: URLEncoding.httpBody, headers: headers)
.responseString { (response) in
if let httpResponse = response.response {
print("error \(httpResponse.statusCode)")
if httpResponse.statusCode == 200 {
//Do something
}
}
}
I did go through similar issues raised by other users...but couldn't find from them an exact solution for my issue...

Answer 1

Try this
Alamofire.request(url, method: .post, parameters: Parameters, encoding: URLEncoding.httpBody, headers: headers)
.responseJSON { (response) in
switch response.result{
case .success(_):
print("Success: \(response)")
let JsonResponse = response.result.value as? [String: Any]
if JsonResponse?["success"] as! Int == 1{
let dict = JsonResponse?["Details"] as! [String : Any]
let mobileNo = dict["mobile_no"] as! String
}
else{
print("Failed")
}
case .failure(let error):
print("Failed: \(error)")
}
}

Answer 2

There are a couple of issues:
Your parameters to request don't look quite right.
the parameters parameter doesn't look right: at best, it's very strange to have a Parameters variable (you should use lower case for variables; and this conflicts with an Alamofire type);
the encoding should be URLEncoding.default. Or, because URLEncoding.default is the default value, you can omit this altogether.
If you want to check for status code, let validate do that for you.
If you're expecting JSON in response, use reponseJSON instead of responseString.
Use if let or guard let with as? to safely unwrap optionals. Do not use as! (unless you are 100% sure that it never could fail ... and when dealing with responses from a remote server, you can never be 100% confident).
Thus:
func performRequest(url: String, parameters: [String: String]?, headers: [String: String]?) {
Alamofire.request(url, method: .post, parameters: parameters, headers: headers)
.validate(statusCode: 200 ..< 300)
.responseJSON { response in
switch response.result {
case .success(let value):
guard let dictionary = value as? [String: Any],
let success = dictionary["success"] as? Int else {
print("success not found")
return
}
guard success == 1 else {
print("web service reported failure")
return
}
guard let details = dictionary["Details"] as? [String: Any] else {
print("Did not find details")
return
}
guard let mobile = details["mobile_no"] as? String else {
print("mobile not found")
return
}
print(mobile)
case .failure(let error):
print("Failed: \(error)")
}
}
}
Or, in your comment below, if you want to goToSignUpScreen() if success was 0, then:
Alamofire.request(url, method: .post, parameters: parameters, headers: headers)
.validate(statusCode: 200 ..< 300)
.responseJSON { response in
switch response.result {
case .success(let value):
guard let dictionary = value as? [String: Any],
let success = dictionary["success"] as? Int else {
print("success not found")
return
}
if success == 0 {
self.goToSignUpScreen()
}
case .failure(let error):
print("Failed: \(error)")
}
}