Assigning a long JSON response to Dictionary produces a Thread error - ios

Question

When trying to assign a long JSON response to a Dictionary, I get either
nil
or
Thread 1:EXC_BAD_INSTRUCTION (code=EXC_I386_INVOP, subcode=0x0)
Assigning a short response works fine. Here is my code
func getUserInfo() {
let access_token : String = accessToken_json_response["access_token"] ?? "empty"
if access_token != "empty" {
Alamofire.request("https://api.github.com/user?access_token=\(access_token)").responseJSON { response in
if let json = response.result.value {
print(json) //The JSON prints, but takes more than a second to do so.
self.getUser_json_response = json as? Dictionary<String, String> //This produces the thread error when the response is long.
print(self.getUser_json_response) //This either prints nil, or a thread error produces in the previous instruction
}
}
}
}

Answer 1

First of all you are casting to an optional dictionary so it should be conditional binding i.e:
if let unwrappedJson = json as? ....
Second, you should cast to [String : Any] i.e:
if let unwrappedJson = json as? [String : Any]

Answer 2

You have to serialise the response into json and then you can use it as dictionary.
eg: let json = try? JSONSerialization.jsonObject(with: data, options: []) as? [String: Any]
then print this json
Or
Use this link, this is latest update from apple to code and encode json response according to your class or model.
Automatic JSON serialization and deserialization of objects in Swift

Answer 3

may this help..
Alamofire.request(UrlStr, method: .post, parameters: params, encoding: URLEncoding.default, headers: nil)
.validate()
.responseJSON { response in
switch response.result {
case .success:
if let JSON = response.result.value {
print("JSON: \(JSON)")
let jsonResponse = (JSON as? [String:Any]) ?? [String:Any]()
print("jsonResponse: \(jsonResponse)")
}
case .failure(let error):
print(error.localizedDescription)
}
}