Passing JSON result into a struct model - ios

Question

I am receiving a result from an API, I can iterate through the result. My understanding is I can pass the value into a model immediately.
Apple Developer article on struct models
My issue is I am not doing it properly and am receiving a nil value. Perhaps someone can see where I need to change. I am using Swift 4.2
Here is my struct model.
import Foundation
struct ProfileModel {
//MARK: Properties
var name: String
var email: String
var profileURL: String
//MARK: Initialization
}
extension ProfileModel{
init?(json: [String:AnyObject]) {
guard
let name = json["name"] as? String,
let email = json["email"] as? String,
let profileURL = json["profileURL"] as? String
else { return nil }
self.name = name
self.email = email
self.profileURL = profileURL
}
}
Here is my result code from my urlConnection. Let me know if we want to see the entire swift file
//create dataTask using the session object to send data to the server
let task = session.dataTask(with: request as URLRequest, completionHandler: { data, response, error in
guard error == nil else {
return
}
guard let data = data else {
return
}
do {
//create json object from data
if let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String:AnyObject] {
self.onSuccess(data: json)
}
} catch let error {
print(error.localizedDescription)
}
})
task.resume()
}
func onSuccess(data: [String:AnyObject]){
print("onSuccess")
let myProfile = ProfileModel(json: data)
//myProfile is nil while unwrapping
let title: String = myProfile!.name
print(title)
}
I could just iterate through the strings since I am able to print 'data'. I just figured it would be cleaner to put everything into a ProfileModel and manage that object as a whole.
This json is my more simple one which is why I used it for this question. I also can't remember but I had to use "[String:AnyObject]" to get the json properly. This was pulled directly from my terminal, this was the data being passed in my JsonResponse. The output json from Xcode has [] on the outside instead.
{
'detail': 'VALID',
‘name’: ‘Carson,
'email': ‘carson.skjerdal#somethingelselabs.com',
'pic_url': None
}
EDIT:
So my problem is solved, and ultimately moving to Codable was the key. Here is my fixed code for anyone who might need a working solution.
URLSession.shared.dataTask(with: request as URLRequest) { (data, response
, error) in
guard let data = data else { return }
do {
let decoder = JSONDecoder()
let gitData = try decoder.decode(ProfileModel.self, from: data)
print(gitData.name)
self.onSuccess(data: gitData)
} catch let err {
print("Err", err)
}
}.resume()
}
func onSuccess(data: ProfileModel){
print("onSuccess")
print(data.email)
}
My Codable Struct - slightly simplified
import Foundation
struct ProfileModel: Codable {
let detail, name, email: String
private enum CodingKeys: String, CodingKey {
case detail, email
case name = "firstname"
//case picUrl = "pic_url"
}
}

Answer 1

After "Codable" has been introduced I always uses that.
You can take your JSON ans pars it in to QuickType.io, and you will get a Struct that confirms to the codadable
// To parse the JSON, add this file to your project and do:
//
// let aPIResponse = try? newJSONDecoder().decode(APIResponse.self, from: jsonData)
import Foundation
struct APIResponse: Codable {
let detail, name, email, picUrl: String
enum CodingKeys: String, CodingKey {
case detail, name, email
case picUrl = "pic_url"
}
}