i want to prevent taking screen shot in ios devices native code

import Flutter
import UIKit
import NetworkExtension
import FirebaseCore
import app_links

@main
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {
    FirebaseApp.configure()
    GeneratedPluginRegistrant.register(with: self)
    self.window.makeSecure()
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }     
}
extension UIWindow {
   func makeSecure() {
       let field = UITextField()
       field.isSecureTextEntry = true
       self.addSubview(field)
       field.centerYAnchor.constraint(equalTo: self.centerYAnchor).isActive = true
       field.centerXAnchor.constraint(equalTo: self.centerXAnchor).isActive = true
       self.layer.superlayer?.addSublayer(field.layer)
       field.layer.sublayers?.first?.addSublayer(self.layer)
     }
   }

this code is not working on physical ios device ,i want to try native code for preventing taking screen shot & screen recording for secure data