SOLVED: UIDocumentPickerViewController & .stopAccessingSecurityScopedResource() – iOS

I have a viewcontroller that presents my custom ImagePicker class. One of the presented options is to select an image from 'Files', using UIDocumentPickerViewController. Picking an image works fine, but i want close the security resources conform the recommendations.
ProjectimagePicker {
            (...)
            let documentsPicker = UIDocumentPickerViewController(documentTypes: ["public.image", "public.jpeg", "public.png"], in: .open)
            documentsPicker.delegate = self
            documentsPicker.allowsMultipleSelection = false
            documentsPicker.modalPresentationStyle = .fullScreen
            self.presentationController?.present(documentsPicker, animated: true, completion: nil)
//MARK: - Ext. Delegate DocumentPicker
extension ProjectImagePicker: UIDocumentPickerDelegate {
    public func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
        guard controller.documentPickerMode == .open, let url = urls.first, url.startAccessingSecurityScopedResource() else { return }
        defer {
            DispatchQueue.main.async {
                url.stopAccessingSecurityScopedResource()
        guard let image = UIImage(contentsOfFile: url.path) else { return }
        self.delegate?.didSelect(image: image)
        controller.dismiss(animated: true)
    public func documentPickerWasCancelled(_ controller: UIDocumentPickerViewController) {
        controller.dismiss(animated: true)
And in the viewController that called the picker class:
//MARK: - Delegate ProjectImagePicker
extension ProjectDetailsViewController: ProjectImagePickerDelegate {
    func didSelect(image: UIImage?) {
        if let image  = image {
            selectedImage = image
            projectImageView.image = image
Part of the problem I circumvent by wrapping a dispatch call around stopAccessingSecurityScopedResource(). The image gets send back (delegate) and presented
in the viewController. But when I eventually save (write to documents directory) my project and that image (selectedImage), I get the security error
2020-05-08 13:54:04.429936+0200 ProjectS[3482:1339708] [ProjectS] createDataWithMappedFile:1524:  'open' failed '/private/var/mobile/Library/Mobile Documents/com~apple~CloudDocs/10.JPEG'  error = 1 (Operation not permitted)
So, apperently the image is still referencing the URL from the Documents picker. I could try and save the image temporarily in the didPickDocumentsAt method, but that seems ugly. Or I can omit calling stopAccessingSecurityScopedResource(0 all together, but that may cause problems?
Any ideas on how to hanlde this the best possible way ?
                                                
If I update my code for didPickDocumentsAt in the way that I make a copy of the image, all works as intended
//MARK: - Ext. Delegate DocumentPicker
extension ProjectImagePicker: UIDocumentPickerDelegate {
    public func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentsAt urls: [URL]) {
        guard controller.documentPickerMode == .open, let url = urls.first, url.startAccessingSecurityScopedResource() else { return }
        defer {
            DispatchQueue.main.async {
                url.stopAccessingSecurityScopedResource()
        //Need to make a new image with the jpeg data to be able to close the security resources!
        guard let image = UIImage(contentsOfFile: url.path), let imageCopy = UIImage(data: image.jpegData(compressionQuality: 1.0)!) else { return }
        self.delegate?.didSelect(image: imageCopy)
        controller.dismiss(animated: true)
Good solution, or better ideas?
    NEW You don’t need more Swift tutorials. You need a plan, and that's where my book Everything but the Code comes in: it's designed to provide everything you need to go from Xcode to App Store – from coming up with killer ideas, to launch strategy, to breakout success.
Code got you started. This gets you paid.
    Learn more here
                                                    Archived topic
                            This topic has been closed due to inactivity, so you can't reply. Please create a new topic if you need to.
                    All interactions here are governed by our code of conduct.
						Swift, SwiftUI, the Swift logo, Swift Playgrounds, Xcode, Instruments, Cocoa Touch, Touch ID, AirDrop, iBeacon, iPhone, iPad, Safari, App Store, watchOS, tvOS, visionOS, Mac and macOS are trademarks of Apple Inc., registered in the U.S. and other countries. Pulp Fiction is copyright © 1994 Miramax Films.
						Hacking with Swift is ©2025 Hudson Heavy Industries.