ios – In swift, find out how to paste a .json file within the UIDocumentPickerViewController manually?

I have to previous a json file within the UIDocumentPickerViewController, like this:
enter picture description right here

Right here is my code:

import UIKit
import UniformTypeIdentifiers

class ViewController: UIViewController, UIDocumentPickerDelegate {
    
    var demoData = DemoData()

    override func viewDidLoad() {
        tremendous.viewDidLoad()
        // Do any extra setup after loading the view.
        demoData.description = "description de demoData"
        demoData.title = "titre de demoData"
        //Persistence.shared.sauvegarderDonnees(demoData: demoData)
        demoData = Persistence.shared.chargementDonnees()
        print(demoData)
        
    }
    
    @IBAction func PastFile(_ sender: UIButton) {
        let supportedType: [UTType] = [UTType.json]
        let pickerViewController = UIDocumentPickerViewController(forOpeningContentTypes: supportedType, asCopy: false)
        pickerViewController.delegate = self
        pickerViewController.modalPresentationStyle = .overFullScreen
        pickerViewController.allowsMultipleSelection = false
        pickerViewController.shouldShowFileExtensions = true
        self.current(pickerViewController, animated: true, completion: nil)
        print("On est dans le file paperwork")
        }
}

And right here is the category to save lots of and retrieve the json file within the reminiscence of the telephone:

import Basis
class Persistence {
    static let shared = Persistence()
    non-public init() {}
    
    func chargementDonnees() -> DemoData {
        do {
            let appSupport = attempt FileManager.default.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: false)
            let appSupportDirectory = appSupport.appendingPathComponent(Bundle.foremost.bundleIdentifier!, isDirectory: true)
            attempt FileManager.default.createDirectory(at: appSupportDirectory, withIntermediateDirectories: true, attributes: nil)
            let fileURL = appSupportDirectory.appendingPathComponent("DemoData.json")
            let loadedData = attempt Knowledge(contentsOf: fileURL)
            // decoding the info loaded
            let loadedDemoData: DemoData = attempt loadedData.decodedObject()
            print("Le chargement des données a réussi dans Persistence")
            return loadedDemoData
        } catch {
            print("Le chargement des données a échoué dans Persistence")
            let demoData = DemoData()
            return demoData
        }
    }
    
    
    func sauvegarderDonnees(demoData: DemoData) {
        do {
            let appSupport = attempt FileManager.default.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: false)
            let appSupportDirectory = appSupport.appendingPathComponent(Bundle.foremost.bundleIdentifier!, isDirectory: true)
            attempt FileManager.default.createDirectory(at: appSupportDirectory, withIntermediateDirectories: true, attributes: nil)
            let fileURL = appSupportDirectory.appendingPathComponent("DemoData.json")
            // encoding
            let information = attempt demoData.information()
            // saving
            attempt information.write(to: fileURL, choices: .atomic)
            print("La sauvegarde des données a réussi dans Persistence")
        } catch {
            print("La sauvegarde des donneés a échoué dans Persistence")
        }
    }
}

with the operate PastFile() within the ViewController, i’m going to UIDocumentPickerViewController the place i wish to previous the file “DemoData.json”, like within the picture.
So find out how to handle/copy the .json file with the intention to previous it manually within the UIDocumentPickerViewController ?