I need to create a table view with a nested Json - json

Question

I have to read a json from the url: https://randomuser.me/api/?results=100
I created the People.swift file that contains the structure created through the site: https://app.quicktype.io/?l=swift
I tried to use this code but I can not then insert the json into the structure and then recall it via cell.people.name for example.
ViewController.swift:
var dataRoutine = [People]() // this is the structure that I created with the site indicated above.
this one is my function to download the Json and parse.
func downloadJsonData(completed : #escaping ()->()){
guard let url = URL(string: "https://randomuser.me/api/?results=100")else {return}
let request = URLRequest.init(url: url)
URLSession.shared.dataTask(with: request) { (data, response, error) in
if let httpResponse = response as? HTTPURLResponse {
let statuscode = httpResponse.statusCode
if statuscode == 404{
print( "Sorry! No Routine Found")
}else{
if error == nil{
do{
self.dataRoutine = try JSONDecoder().decode(People.self, from: data!)
DispatchQueue.main.async {
completed()
print(self.dataRoutine.count) // I don't know why my result is ever 1.
}
}catch{
print(error)
}
}
}
}
}.resume()
}
my structure is :
import Foundation
struct People: Codable {
let results: [Result]?
let info: Info?
}
struct Info: Codable {
let seed: String?
let results, page: Int?
let version: String?
}
struct Result: Codable {
let gender: Gender?
let name: Name?
let location: Location?
let email: String?
let login: Login?
let dob, registered: Dob?
let phone, cell: String?
let id: ID?
let picture: Picture?
let nat: String?
}
struct Dob: Codable {
let date: Date?
let age: Int?
}
enum Gender: String, Codable {
case female = "female"
case male = "male"
}
struct ID: Codable {
let name: String?
let value: String?
}
struct Location: Codable {
let street, city, state: String?
let postcode: Postcode?
let coordinates: Coordinates?
let timezone: Timezone?
}
struct Coordinates: Codable {
let latitude, longitude: String?
}
enum Postcode: Codable {
case integer(Int)
case string(String)
init(from decoder: Decoder) throws {
let container = try decoder.singleValueContainer()
if let x = try? container.decode(Int.self) {
self = .integer(x)
return
}
if let x = try? container.decode(String.self) {
self = .string(x)
return
}
throw DecodingError.typeMismatch(Postcode.self, DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "Wrong type for Postcode"))
}
func encode(to encoder: Encoder) throws {
var container = encoder.singleValueContainer()
switch self {
case .integer(let x):
try container.encode(x)
case .string(let x):
try container.encode(x)
}
}
}
struct Timezone: Codable {
let offset, description: String?
}
struct Login: Codable {
let uuid, username, password, salt: String?
let md5, sha1, sha256: String?
}
struct Name: Codable {
let title: Title?
let first, last: String?
}
enum Title: String, Codable {
case madame = "madame"
case mademoiselle = "mademoiselle"
case miss = "miss"
case monsieur = "monsieur"
case mr = "mr"
case mrs = "mrs"
case ms = "ms"
}
struct Picture: Codable {
let large, medium, thumbnail: String?
}

Answer 1

The main issue is a type mismatch.
The root object of the JSON is not the People array, it's the umbrella struct, I named it Response
Please change the structs to
struct Response: Decodable {
let results: [Person]
let info: Info
}
struct Info: Decodable {
let seed: String
let results, page: Int
let version: String
}
struct Person: Decodable {
let gender: Gender
let name: Name
let location: Location
let email: String
let login: Login
let dob, registered: Dob
let phone, cell: String
let id: ID
let picture: Picture
let nat: String
}
struct Dob: Decodable {
let date: Date
let age: Int
}
enum Gender: String, Decodable {
case female, male
}
struct ID: Codable {
let name: String
let value: String?
}
struct Location: Decodable {
let street, city, state: String
let postcode: Postcode
let coordinates: Coordinates
let timezone: Timezone
}
struct Coordinates: Codable {
let latitude, longitude: String
}
enum Postcode: Codable {
case integer(Int)
case string(String)
init(from decoder: Decoder) throws {
let container = try decoder.singleValueContainer()
if let x = try? container.decode(Int.self) {
self = .integer(x)
return
}
if let x = try? container.decode(String.self) {
self = .string(x)
return
}
throw DecodingError.typeMismatch(Postcode.self, DecodingError.Context(codingPath: decoder.codingPath, debugDescription: "Wrong type for Postcode"))
}
func encode(to encoder: Encoder) throws {
var container = encoder.singleValueContainer()
switch self {
case .integer(let x):
try container.encode(x)
case .string(let x):
try container.encode(x)
}
}
}
struct Timezone: Codable {
let offset, description: String
}
struct Login: Codable {
let uuid, username, password, salt: String
let md5, sha1, sha256: String
}
struct Name: Codable {
let title: Title
let first, last: String
}
enum Title: String, Codable {
case madame, mademoiselle, miss, monsieur, mr, mrs, ms
}
struct Picture: Codable {
let large, medium, thumbnail: String
}
Almost all properties can be declared non-optional, the date key in Dob is an ISO8601 date string you have to add the appropriate date decoding strategy. The People array is the property results of the root object.
var dataRoutine = [Person]()
func downloadJsonData(completed : #escaping ()->()){
guard let url = URL(string: "https://randomuser.me/api/?results=100")else {return}
URLSession.shared.dataTask(with: url) { (data, response, error) in
if let httpResponse = response as? HTTPURLResponse {
let statuscode = httpResponse.statusCode
if statuscode == 404{
print( "Sorry! No Routine Found")
}else{
if error == nil{
do{
let decoder = JSONDecoder()
decoder.dateDecodingStrategy = .iso8601
let jsonResponse = try decoder.decode(Response.self, from: data!)
self.dataRoutine = jsonResponse.results
DispatchQueue.main.async {
completed()
print(self.dataRoutine.count) // I don't know why my result is ever 1.
}
}catch{
print(error)
}
}
}
}
}.resume()
}