Export all images from Core Data SwiftUI - ios

Question

I'm trying to build out a simple way for my users to export their data outside of the app.. nothing that needs to be imported back in, just some way for them to back up the data for reference purposes. I have a Core Data Entity Project and the users are able to individually share a project in order to save the project data and images using the standard iOS Share Sheet. Works great.
However I'd like there to be a solution to export everything at once, not just individual projects one at a time.
I have part of it working, where I can export the data from Core Data (that isn't an image) into a CSV for users to reference. However I'm stuck on finding the best way to get all the Images exported in a similar singular button. Allowing the user to pick a location where a Folder would be created containing the images would be ideal.
Here's my code for the CSV export which works great:
func exportCSV() {
let fileName = "Metadata_Export_\(Date()).csv"
let path = NSURL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent(fileName)
var csvText = "Name,Date,Project_Description\n"
for project in projects {
csvText += "\(project.person?.name ?? "-"),\(project.date ?? Date()),\(project.bodyText ?? "-"),\n"
}
do {
try csvText.write(to: path!, atomically: true, encoding: String.Encoding.utf8)
} catch {
print("Failed to create file")
print("\(error)")
}
print(path ?? "not found")
var filesToShare = [Any]()
filesToShare.append(path!)
let av = UIActivityViewController(activityItems: filesToShare, applicationActivities: nil)
UIApplication.shared.windows.first?.rootViewController?.present(av, animated: true, completion: nil)
isShareSheetShowing.toggle()
}
Now I just need to get the Images exported out. Images are saved in Core Data as Binary objects, and will be written to File if they're larger than 128kb (and therefore written to blob in CD if less than 128kb).
The images are stored in CD as Optionals, project.image1, project.image2, project.image3, and project.image4
I've looked at examples using fileManager and other solutions, but I'm not sure on the correct approach to pursue since many of those are actually alternatives to saving images in Core Data - not necessarily configuring user interaction for picking where to export images.
Can the above exportCSV function be adapted to a similar result for the project's images? My app supports iOS 14 and later, if that makes a difference. Thanks for any suggestions/direction!
=== UPDATE ===
I've discovered fileExporter() which seems like a promising solution. I've been able to implement a simple POC of this method by exporting an Image I have stored in my Assets folder. Has anyone used this method to achieve exporting all images out of Core Data?
I can add the modifier to my view:
.fileExporter(isPresented: $exportFile, documents: [
ImageDocument(image: UIImage(named: "testimage"))
],
contentType: .png, onCompletion: { (result) in
if case .success = result {
print("Success")
} else {
print("Failure")
}
})
}
Using an ImageDocument Struct as follows:
struct ImageDocument: FileDocument {
static var readableContentTypes: [UTType] { [.jpeg, .png, .tiff] }
var image: UIImage
init(image: UIImage?) {
self.image = image ?? UIImage()
}
init(configuration: ReadConfiguration) throws {
guard let data = configuration.file.regularFileContents,
let image = UIImage(data: data)
else {
throw CocoaError(.fileReadCorruptFile)
}
self.image = image
}
func fileWrapper(configuration: WriteConfiguration) throws -> FileWrapper {
// You can replace tiff representation with what you want to export
return FileWrapper(regularFileWithContents: image.jpegData(compressionQuality: 1)!)
}
}
So how can I have it include an Array of all images?