Swift iOS How to place an image on top of an ImagePicker?

Question

iOS

Hello everyone
There is a code that displays the camera in the sheet

//
//  ImagePicker.swift
//

import SwiftUI

struct ImagePicker: UIViewControllerRepresentable {
    
    var sourceType: UIImagePickerController.SourceType = .photoLibrary
    
    @Binding var selectedImage: UIImage
    @Binding var takeNewPhoto: Bool
    @Environment(\.presentationMode) private var presentationMode

    func makeUIViewController(context: UIViewControllerRepresentableContext<ImagePicker>) -> UIImagePickerController {
        
        let imagePicker = UIImagePickerController()
        imagePicker.allowsEditing = false
        imagePicker.sourceType = sourceType
        if sourceType == .camera {
            imagePicker.cameraDevice = .front
            
            let overlayView = UIImageView(frame: imagePicker.cameraOverlayView!.frame)
            let crosshairLabel = UIImageView()

            crosshairLabel.image = UIImage(named: "frame")

            overlayView.bounds = imagePicker.cameraOverlayView!.bounds

            crosshairLabel.alpha = 0.4
            crosshairLabel.translatesAutoresizingMaskIntoConstraints = false
            overlayView.addSubview(crosshairLabel)

            crosshairLabel.centerXAnchor.constraint(equalTo: overlayView.centerXAnchor).isActive = true
            crosshairLabel.centerYAnchor.constraint(equalTo: overlayView.centerYAnchor).isActive = true
            crosshairLabel.heightAnchor.constraint(equalTo: overlayView.widthAnchor, multiplier: 0.6).isActive = true
            crosshairLabel.widthAnchor.constraint(equalTo: overlayView.widthAnchor, multiplier: 0.6).isActive = true

            // To avoid blocking the underneath default camera controls
            overlayView.isUserInteractionEnabled = false

            imagePicker.cameraOverlayView = overlayView
        }
        imagePicker.delegate = context.coordinator
        
        return imagePicker
    }
    
    func updateUIViewController(_ uiViewController: UIImagePickerController, context: UIViewControllerRepresentableContext<ImagePicker>) {
        
    }
    
    func makeCoordinator() -> Coordinator {
        Coordinator(self)
    }
    
    final class Coordinator: NSObject, UIImagePickerControllerDelegate, UINavigationControllerDelegate {
        
        var parent: ImagePicker
        
        init(_ parent: ImagePicker) {
            self.parent = parent
        }
        
        func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
            
            if let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage {
                parent.selectedImage = image
                parent.takeNewPhoto = true
            }
            
            parent.presentationMode.wrappedValue.dismiss()
        }
    }
}

It turns out like this:


How to make it so that during the photo the red square is in the middle, and when viewing the result, it disappears altogether?