JSON parsing data in SWIFTUI - json

Question

in my very basic code I need get data from JSON. But i get only one value.
i have this input JSON:
{
"features":
[
{
"geometry":
{
"coordinates": [
14.49961,
50.03353
],
"type": "Point"
}
},
{
"geometry":
{
"coordinates": [
14.4213,
50.00144
],
"type": "Point"
}
}
],
"type": "FeatureCollection"
}
and this code in SwiftUI, where i need get all data throw JSON. Value of field "type" work, but rest of field i can't get - what i do wrong?
import Foundation
import SwiftUI
import MapKit
import Combine
class fetchResults{
func getData(completion: #escaping (RequestA) -> ()){
let url = URL(string: "https://api.golemio.cz/v2/vehiclepositions?limit=2")!
var request = URLRequest(url: url)
request.addValue("application/json; charset=utf-8", forHTTPHeaderField: "Content-Type")
request.addValue("XXXXXXXXXXXXXXXX", forHTTPHeaderField: "x-access-token")
let task = URLSession.shared.dataTask(with: request) { data, response, error in
let result = try! JSONDecoder().decode(RequestA.self, from: data!)
if let response = response {
if let data = data, let body = String(data: data, encoding: .utf8) {
DispatchQueue.main.async {
completion(result)
}
}
} else {
print(error ?? "Unknown error")
}
}
task.resume()
}
}
struct RequestA: Decodable {
var features: [Features]!
var type: String
}
struct Features: Decodable {
var geometry: Geometry
}
struct Geometry: Decodable {
var coordinates: [Double]
var type: String
}
struct ContentView: View {
#State var res = RequestA()
var body: some View {
Text(res.type ?? "N/A") // <<< "res.type" work but "res.features.geometry.coordinates[0] not
.onAppear()
{
fetchResults().getData
{(res) in
self.res = res
}
}
}
}
I will be very glad, if somebody help me a show me, what i do wrong.

Answer 1

res.features.geometry.coordinates
res is RequestA and a "RequestA" has a property features which is of type [Features] - an array of "Features"
Array of features doesn't have a property "geometry" so you can't write an expression like res.features.geometry
Did you mean for RequestA "features" property to be of type Features not [Features]? Or did you mean to do something for each one of the features in the array, or perhaps the first one etc?
If you're interested in parsing GeoJSON, then see Swift GeoJson Parse

Answer 2

If someone will solve a similar problem, I solved it like this inside body View:
print(res.features![0].geometry.coordinates[0])
Karel