[PHPicker] Permission error followed by "no such file" error

Question

I have a naive implementation of the new PHPicker in SwiftUI (code below). When running on a separate device (iPhone 6s, iOS 14.0), I am able to load some images, but not others.

The images that do not load seem to encounter a permissions error:

Code Block // [...] indicates redacted content for brevity 
[...] [default] [ERROR] Could not create a bookmark: NSError: Cocoa 257 "The file couldn’t be opened because you don’t have permission to view it." }
[...] [claims] Upload preparation for claim [...] completed with error: Error Domain=NSCocoaErrorDomain Code=260 "The file “[...].jpeg” couldn’t be opened because there is no such file." UserInfo={NSURL=[...]{Error Domain=NSPOSIXErrorDomain Code=2 "No such file or directory"}}

I'm a little confused because I thought a core value proposition of the new PHPicker was that it automatically allowed access to selected photos.

When I try selecting an image using Simulator, I just get the second error (does not exist), but not the first.

I'm also noticing that the main photos grid does not seem to automatically update with new photos, even though the "Recent" album does. I have to force quit and restart the app to see the latest photos appear, though I have not been able to load any of them due to the issue described above.

Code Block swift//
// PhotoPicker.swift
// NewParis
//
// Created by Yihwan Kim on 7/12/20.
//
import SwiftUI
import UIKit
import PhotosUI
struct PhotoPicker: UIViewControllerRepresentable {
  @Binding var isPresented: Bool
  @Binding var selectedImage: Image?
   
  func makeUIViewController(context: Context) -> PHPickerViewController {
    var configuration = PHPickerConfiguration(photoLibrary: PHPhotoLibrary.shared())
     
    configuration.filter = .images
     
    let controller = PHPickerViewController(configuration: configuration)
    controller.delegate = context.coordinator
    return controller
  }
   
  func updateUIViewController(_ uiViewController: UIViewControllerType, context: Context) { }
   
  func makeCoordinator() -> Coordinator {
    Coordinator(self)
  }
   
  class Coordinator: PHPickerViewControllerDelegate {
    private let parent: PhotoPicker
     
    init(_ parent: PhotoPicker) {
      self.parent = parent
    }
     
    func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) {
      parent.isPresented = false
       
      if let itemProvider = results.first?.itemProvider, itemProvider.canLoadObject(ofClass: UIImage.self) {
        itemProvider.loadObject(ofClass: UIImage.self) { [weak self] uiImage, error in
          DispatchQueue.main.async {
            guard let self = self, let uiImage = uiImage as? UIImage else { return }
            self.parent.selectedImage = Image(uiImage: uiImage)
          }
        }
      }
    }
  }
}

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Posted by

yihwan

Reply

Code Block swift
itemProvider.loadDataRepresentation(forTypeIdentifier: UTType.image.identifier) { [weak self] (data, error) in
guard let data = data else {
self?.parent.isPresented = false
return
}

if let error = error {
self?.parent.isPresented = false
}

let sourceOptions = [kCGImageSourceShouldCache: false] as CFDictionary
guard let source = CGImageSourceCreateWithData(data as CFData, sourceOptions) else {
return
}

let downsampleOptions = [
kCGImageSourceCreateThumbnailFromImageAlways: true,
kCGImageSourceCreateThumbnailWithTransform: true,
kCGImageSourceThumbnailMaxPixelSize: 1024,
] as CFDictionary

guard let cgImage = CGImageSourceCreateThumbnailAtIndex(source, 0, downsampleOptions) else {
return
}

let destinationData = NSMutableData()
guard let imageDestination = CGImageDestinationCreateWithData(destinationData, kUTTypeJPEG, 1, nil) else {
return
}

// Don't compress PNGs, they're too pretty
let isPNG: Bool = {
guard let utType = cgImage.utType else { return false }
return (utType as String) == UTType.png.identifier
}()

let destinationProperties = [
kCGImageDestinationLossyCompressionQuality: isPNG ? 1.0 : 0.75
] as CFDictionary

Code Block
let supportedRepresentations = [UTType.rawImage.identifier,
UTType.tiff.identifier,
UTType.bmp.identifier,
UTType.png.identifier,
UTType.heif.identifier,
UTType.heic.identifier,
UTType.jpeg.identifier,
UTType.webP.identifier,
UTType.gif.identifier,
]
for representation in supportedRepresentations {
if result.itemProvider.hasRepresentationConforming(toTypeIdentifier: representation, fileOptions: .init()) {
result.itemProvider.loadInPlaceFileRepresentation(forTypeIdentifier: representation) { (originalUrl, inPlace, error) in

[PHPicker] Permission error followed by "no such file" error

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