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PhotoKit
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Work with image and video assets managed by the Photos app, including those from iCloud Photos and Live Photos, using PhotoKit.
PhotoKit Documentation
Posts under PhotoKit tag
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Activity
Add a value to the Photos Caption field
In the iOS Photos app there is a caption field the user can write to.  How can you write to this value from Swift when creating a photo?
I see apps that do this, but there doesn't seem to be any official way to do this using the Photo library through PHAssetCreationRequest or PHAssetResourceCreationOptions or setting EXIF values, I tried settings a bunch of values there including IPTC values but nothing appears in the caption field in the iOS photos app.
There must be some way to do it since I see other apps setting that value somehow after capturing a photo.
Topic:
UI Frameworks
SubTopic:
General
Tags:
Swift
PhotoKit
AVFoundation
2
1
280
2d
PHAsset Additional Properties
Following Metadata should be accessible from PHAsset Object: Title, caption, Keywords. Write now they are available in the SQLite Photo Library, but thats is not a clean solution.
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
PhotoKit
2
4
655
2d
Request photo library authorization popup on macOS Catalyst can't be dismissed
I have an iOS app that I want to publish to the Mac App Store as a Catalyst app, but I noticed a situation where the app can't be closed and has to be force quit.
The problem happens if the user has 0 photos in their Photo Library, and hits "Limited Access" on the request authorization prompt (In my case PHPhotoLibrary.requestAuthorization(for: .readWrite).
Since the popup is a system prompt, I can't manually add a close button to it. I tried wrapping it in a view with a close button but the popup always shows up over any view I'm presenting within my app. If anyone has a workaround that would be greatly appreciated!
Topic:
UI Frameworks
SubTopic:
SwiftUI
Tags:
PhotoKit
Photos and Imaging
macOS
Mac Catalyst
2
0
94
1w
PHPickerViewController: UI rendering failure and data retrieval errors on iOS 17 & 26.4
Description:
I am encountering critical issues with PHPickerViewController using the "Zero-Permission" configuration. The behavior differs significantly between iOS 17 and iOS 26.4, but both prevent successful image selection.
Observed Behaviors:
On iOS 26.4 (iPhone 17 Pro Max): The PHPicker UI fails to render the photo grid entirely. Upon initialization, the system UI displays an "Unable to load photo" alert, preventing users from even viewing or selecting images.
On iOS 17: The picker UI loads, but after the user selects an image and adds it, the subsequent itemProvider.loadObject call consistently fails, returning an error and preventing our app from retrieving the image data.
Current Implementation:
var config = PHPickerConfiguration()
config.filter = .images
config.selectionLimit = pickLimit
// Problematic logic:
if ABTestManager.shared.isPHPickerCurrent {
config.preferredAssetRepresentationMode = .current
}
let pickerVC = PHPickerViewController(configuration: config)
pickerVC.delegate = self
user device Images:
What I have tested:
I have been using preferredAssetRepresentationMode = .current in my AB tests.
I have not yet tested .compatible mode, as my application logic requires access to high-fidelity assets. However, the current behavior suggests a regression or a fundamental incompatibility with how the system handles image containers for high-end hardware (e.g., iPhone 17 Pro Max) in the out-of-process picker.
Supporting Documentation:
Minimal Reproducible Project: [Attached]
Logs: [Attached sysdiagnose logs]
My Questions:
Is the "Unable to load photo" UI failure on iOS 26.4 a known limitation for certain high-resolution asset types when using .current mode?
Are there specific handling requirements for NSItemProvider when the system fails to resolve the image data in .current mode on older iOS 17 devices?
Given that these failures occur in a "Zero-Permission" context, are there specific metadata or image processing constraints I should be aware of to prevent the picker from entering a "failed" state?
Topic:
UI Frameworks
SubTopic:
UIKit
Tags:
PhotoKit
2
1
217
2w
Best practice for rapid sequential Live Photo captures with AVCapturePhotoOutput?
Hi everyone,
I’m working on a camera app as a learning project and have reached a point where I’m trying to better understand the intended architecture for Live Photo capture using AVCapturePhotoOutput.
The app currently supports:
Live Photos
Depth data
Location metadata
Multiple lens presets on a virtual multi-camera device
Everything is working well, but I’m now thinking about capture throughput and rapid shutter presses.
Right now, my implementation is fairly conservative. I wait for a Live Photo capture to finish processing and importing before allowing another capture. This is reliable, but it doesn’t feel particularly camera-like when compared to Apple’s Camera app.
One observation from field testing caught my attention:
I took a Live Photo, immediately switched lenses, then took another Live Photo. When I viewed the first Live Photo later, the movie portion included the lens-switching actions that occurred after I pressed the shutter.
That made me realize that I may be thinking about the capture lifecycle incorrectly.
My questions are:
When using AVCapturePhotoOutput with Live Photos enabled, what is the earliest point at which a capture can be considered “safely secured”?
Is it expected that apps wait for PhotoKit import to complete before accepting another Live Photo capture request?
If supporting rapid sequential shutter presses, is the recommended approach to queue capture requests and process them one at a time?
Are there any best practices around lens changes or camera reconfiguration while a Live Photo is still being captured or processed?
I’m not looking for details about the implementation of Apple’s Camera app. I’m mainly trying to understand the recommended approach when working with the public AVFoundation APIs.
I’d appreciate any guidance, documentation references, or examples from developers who have worked through similar problems.
Thanks!
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
AVFoundation
PhotoKit
Camera
Photos and Imaging
1
0
362
3w
PHAssetResourceUploadJobChangeRequest doesn't upload iCloud-optimized photos — is this expected?
I'm implementing PHBackgroundResourceUploadExtension to back up photos and videos to our cloud storage service.
During testing, I observed that iCloud-optimized photos (where the full-resolution original is stored in iCloud, not on device) do not upload. The upload job appears to silently skip these assets.
Questions:
Is this behavior intentional/documented? I couldn't find explicit mention of this limitation.
If the device only has the optimized/thumbnail version locally, does the system:
- Automatically download the full-resolution asset from iCloud before uploading?
- Skip the asset entirely?
- Return an error via PHAssetResourceUploadJobChangeRequest?
For a complete backup solution, should we:
- Pre-fetch full-resolution assets using PHAssetResourceManager.requestData(for:options:) before creating upload jobs?
- Use a hybrid approach (this extension for local assets + separate logic for iCloud-only assets)?
Environment: iOS 26, Xcode 18
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Extensions
PhotoKit
Background Tasks
1
1
487
Jun ’26
How to upload large videos with PHAssetResourceUploadJobChangeRequest?
I'm implementing a PHBackgroundResourceUploadExtension to back up photos and videos from the user's library to our cloud storage service.
Our existing upload infrastructure uses chunked uploads for large files (splitting videos into smaller byte ranges and uploading each chunk separately). This approach:
Allows resumable uploads if interrupted
Stays within server-side request size limits
Provides granular progress tracking
Looking at the PHAssetResourceUploadJobChangeRequest.createJob(destination:resource:) API, I don't see a way to specify byte ranges or create multiple jobs for chunks of the same resource.
Questions:
Does the system handle large files (1GB+) automatically under the hood, or is there a recommended maximum file size for a single upload job?
Is there a supported pattern for chunked/resumable uploads, or should the destination URL endpoint handle the entire file in one request?
If our server requires chunked uploads (e.g., BITS protocol with CreateSession → Fragment → CloseSession), is this extension the right mechanism, or should we use a different approach for large videos?
Any guidance on best practices for large asset uploads would be greatly appreciated.
Environment: iOS 26, Xcode 18
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Extensions
PhotoKit
Background Tasks
5
1
1.2k
Jun ’26
A few issues with the iPhone Photos app
I’m curious what framework and rendering technique you’re using for the photo album’s grid zoom in and out. Why is it so incredibly smooth? I can’t seem to pull that off 🤦‍♂️
Topic:
App & System Services
SubTopic:
General
Tags:
Media
Photos and Imaging
PhotoKit
2
0
284
May ’26
PHPickerConfiguration.preselectedAssetIdentifiers not work
let authStatus = PHPhotoLibrary.authorizationStatus(for: .readWrite)
let fetchResult = PHAsset.fetchAssets(withLocalIdentifiers: selectedAssetIDs, options: nil)
print("[AlbumCreation] authStatus=\(authStatus.rawValue) IDs=\(selectedAssetIDs.count) PHAsset匹配=\(fetchResult.count)") // result is:  [AlbumCreation] authStatus=3 IDs=3 PHAsset匹配=3
var config = PHPickerConfiguration(photoLibrary: .shared())
config.preselectedAssetIdentifiers = selectedAssetIDs
config.selectionLimit = 0
let picker = PHPickerViewController(configuration: config)
picker.delegate = self
present(picker, animated: true)
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
PhotoKit
1
0
380
May ’26
PHPhotosErrorDomain Code: 3302 started affecting my users recently.
Recently I received multiple user email supports because the app cannot save video to photos, they are all on iOS 26.x
The code in my app around recording video and saving to Photos hasn't changed in years.
I'm not able to reproduce it locally, I tried on all my available devices.
In recently published build I added additional logs and it appears that all of cases that fail with 3302 have the photos access set to "Limited Access". It never happens to users with "Full Access".
In that build I also added a fallback, when saving to photos fails, the app saves to Documents and it seems it works (two of my users affected users confirmed it), but it's very unfortunate. I think it kind of proves that videos aren't broken given that users are able to play them just fine.
On of users says that for him saving to Photos works for 2-3 times after he reinstalls the app and then it stops working.
Did anything recently changed in how we should save videos to photos?
I'm using the following code. I can see in git blame that I haven't changed in since 2020 and never encountered those errors in development or heard about those issues until around 1 month ago.
Thank you.
PHPhotoLibrary.shared().performChanges {
PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: fileURL)
} completionHandler: { success, error in
Topic:
Media Technologies
SubTopic:
Video
Tags:
PhotoKit
AVFoundation
2
0
387
Apr ’26
Trying to load image & identifier from photo library with PhotosPicker
I'm updating an older Mac app written in Objective C and OpenGL to be a mutliplatform app in SwiftUI and Metal.
The app loads images and creates kaleidoscope animations from them.
It is a document-based application, and saves info about the kaleidoscope into the document. On macOS, it creates a security-scoped bookmark to remember the user's chosen image.
On iOS, I use a PhotosPicker to have the user choose an image from their photo library to use. I would like to get the itemIdentifier from the image they choose and save that into my document so I can use it to fetch the image when the user reloads the kaleidoscope document in the future.
However, the call to loadTransferable is returning nil for the  itemIdentifier. Here is my iOS/iPadOS code:
#if os(macOS)
// Mac code
#else
PhotosPicker("Choose image", selection: $selectedItem, matching: .images)
.onChange(of: selectedItem) {
Task {
if let newValue = selectedItem {
scopeState.isHEIC =  newValue.supportedContentTypes.contains(UTType.heic)
let data = try? await newValue.loadTransferable(type: Data.self)
print("newValue = \(newValue)")
print("newValue.supportedContentTypes = \(newValue.supportedContentTypes)")
scopeState.selectedImageID = newValue.itemIdentifier
scopeState.selectedImageData = data
}
}
}
#endif
The debug print statements show:
newValue = PhotosPickerItem(_itemIdentifier: "9386762B-C241-4EE2-9942-BC04017E35C1/L0/001", _shouldExposeItemIdentifier: false, _supportedContentTypes: [<_UTCoreType 0x20098cd40> public.png (not dynamic, declared), <UTType 0x11e4ec060> com.apple.private.photos.thumbnail.standard (not dynamic, declared), <UTType 0x11e4ec150> com.apple.private.photos.thumbnail.low (not dynamic, declared)], _content: _PhotosUI_SwiftUI.PhotosPickerItem.(unknown context at $1e75ee3bc).Content.result(PhotosUI.PHPickerResult(itemProvider: <PUPhotosFileProviderItemProvider: 0x11d2bd680> {types = (
"public.png",
"com.apple.private.photos.thumbnail.standard",
"com.apple.private.photos.thumbnail.low"
)}, _objcResult: <PHPickerResult: 0x11b18cff0>)))
newValue.supportedContentTypes = [<_UTCoreType 0x20098cd40> public.png (not dynamic, declared), <UTType 0x11e4ec060> com.apple.private.photos.thumbnail.standard (not dynamic, declared), <UTType 0x11e4ec150> com.apple.private.photos.thumbnail.low (not dynamic, declared)]
And the returned item has a nil itemIdentifier. (note the _shouldExposeItemIdentifier=false in the log of the selected item).
How do I get the itemIdentifier for the user's chosen image?
And is that valid to then fetch the asset when the user reloads their document? Is it like a security-scoped bookmark on macOS, where the itemIdentifier is like a key that gives me permission to reload the image?
If not, what do I need to do in order to reload the image the next time the user opens a saved kaleidoscope document?
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Media
Photos and Imaging
PhotoKit
1
0
1k
Apr ’26
Clarification on Disk Write Limits (bug_type 145) and Cross-Volume Write Amplification
Hello Apple Developer Support and Community,
I am a senior software engineer investigating a Disk Writes Resource Violation (bug_type 145) for a photo-management application (BeePhotos v2.3.0). We observed a violation where the app dirtied approximately 1GB of file-backed memory in just 48 seconds, triggering a resource report.
[Core Diagnostic Data]
The following data is extracted from the .crash report:
Event: disk writes
Action taken: none
Writes caused: 1073.96 MB over 48.28s (Average: 22.24 MB/second)
System Limit: 1073.74 MB over 86,400 seconds (Daily limit)
Device: iPhone 15 Pro (iPhone16,2)
OS Version: iOS 26.4 (Build 23E244)
Free Space: 3852.25 MB (Approx. 3.8 GB)
[Implementation Details]
Our application performs the following sequence for a 1GB video download:
Download: Uses NSURLSessionDownloadTask to download the file to the system-provided location URL (in the /tmp or com.apple.nsurlsessiond directory).
Move: In didFinishDownloadingToURL, we move the file to the App’s sandbox Library/Caches directory using FileManager.default.moveItem(at:to:).
Save: We then add the file to the Photo Library via PHAssetCreationRequest.addResource(with:fileURL:options:) using the local URL in Library/Caches.
[Technical Questions]
I suspect the 1GB download is being "amplified" into ~3GB of total physical writes, and I would like to confirm the following:
Cross-Volume Move: Does moving a file from the nsurlsessiond managed temporary directory to the App’s sandbox Library/Caches constitute a Cross-Volume Move on APFS? If so, does this effectively double the write count (1GB download + 1GB copy-on-move)?
PHPhotoLibrary Ingestion: When using PHAssetCreationRequest, does the system perform another 1:1 data copy of the source file into the assets database? Would this result in a 3rd GB of writing?
Low Disk Space Impact: Given the device only had 3.85 GB free, does the system’s "low disk space" state (near the 150MB threshold) increase the overhead for metadata updates or physical write amplification that counts towards this limit?
Best Practices: To stay within the daily 1GB budget for high-resolution media, is it recommended to call PHAssetCreationRequest directly using the location URL from didFinishDownloadingToURL to avoid intermediary copies? Are there any permission or lifecycle risks with this approach?
Any insights from the Apple engineering team or the community on how to minimize the write footprint during high-speed ingestion would be highly appreciated.
Best regards
Topic:
App & System Services
SubTopic:
Core OS
Tags:
Files and Storage
PhotoKit
1
0
274
Apr ’26
macOS 26.4 regression with Mac Catalyst apps using PhotoKit: Photos do not appear when using limited access - Failed to get sandbox extension for url - Image request failed with error PHPhotosErrorDomain Code 3303
I just submitted FB22318443. In Mac Catalyst apps running on macOS 26.4, if you choose to limit the app's access to specific photos (as opposed to granting full access), the photos do not appear in the app. 💀
This issue does not occur on iPadOS. It is a macOS 26.4 regression. It occurs even with apps built using a previous version of the SDK such as 26.2.
A sample of the console logs:
[RM]: 4-1-1 failed to decode for asset: 9290CC20-B85D-47B5-BDBE-D330FE61773D, error code: 3303, description: Error Domain=PHPhotosErrorDomain Code=3303 "(null)"
Failed to get sandbox extension for url: file:///Users/Jordan/Pictures/Photos%20Library.photoslibrary/resources/derivatives/masters/9/9290CC20-B85D-47B5-BDBE-D330FE61773D_4_5005_c.jpeg, error: Error Domain=com.apple.photos.error Code=44001 "sandbox extension not in the cache after requesting them for path: /Users/Jordan/Pictures/Photos Library.photoslibrary/resources/derivatives/masters/9/9290CC20-B85D-47B5-BDBE-D330FE61773D_4_5005_c.jpeg" UserInfo={NSDebugDescription=sandbox extension not in the cache after requesting them for path: /Users/Jordan/Pictures/Photos Library.photoslibrary/resources/derivatives/masters/9/9290CC20-B85D-47B5-BDBE-D330FE61773D_4_5005_c.jpeg}
[RM]: 1-1-1 Image request failed with error: Error Domain=PHPhotosErrorDomain Code=3303 "(null)"
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
macOS
Mac Catalyst
Photos and Imaging
PhotoKit
0
0
692
Mar ’26
How to get iCloud item(photo/video) size?
How I can get iCloud photo file size?
Could I use private API like this in prod? Does anyone know another way? (without downloading the file to the device)
func getFileSize(asset: PHAsset) -> Int64? {
let resources = PHAssetResource.assetResources(for: asset)
let resource = resources.first
let size = resource?.value(forKey: "fileSize") as? Int64
return size
}
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
PhotoKit
1
0
331
Mar ’26
Implementing PHBackgroundResourceUploadExtension
Hi,
I am trying to implement a PHBackgroundResourceUploadExtension to upload backup media files to an external cloud service based on these docs: https://developer.apple.com/documentation/PhotoKit/uploading-asset-resources-in-the-background#Acknowledge-completed-jobs
Creating jobs and actual uploading is working as expected, but the problem I have is in the acknowledgeCompletedJobs() function.
When trying to access a job's resource, the resource is nil and thus has empty assetLocalIdentifier and originalFilename.
Did anybody successfully implement this extension or knows, why this would happen? Because the resource of an acknowledgable job is empty, I can not match it back to my processed assets.
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Extensions
PhotoKit
Background Tasks
1
0
528
Mar ’26
Does PhotoKit provide access to People, Places, and Shared Albums?
I know how to search for Smart Albums (favorites, selfies, etc...) containing photos:
// Get smart albums
PHFetchResult *smartAlbums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeAlbumRegular options:nil];
I have the following questions:
Is there a way to enumerate the People Smart Albums and access the photos in a specific People Smart Album?
Is there a way to enumerate the Places Smart Albums and access the photos in a specific Place Smart Album?
Is there a way to enumerate Shared Albums (shared to the current iCloud user) and access the photos in a specific Shared Album?
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
PhotoKit
1
2
958
Mar ’26
Implementing PHBackgroundResourceUploadExtension
Hi,
I am trying to implement a PHBackgroundResourceUploadExtension to upload backup media files to an external cloud service based on these docs: https://developer.apple.com/documentation/PhotoKit/uploading-asset-resources-in-the-background#Acknowledge-completed-jobs
Creating jobs and actual uploading is working as expected, but the problem I have is in the acknowledgeCompletedJobs() function.
When in this function, I am trying to access a job's resource. The resource is nil and thus has empty assetLocalIdentifier and originalFilename.
Did anybody successfully implement this extension or knows, why this would happen? Because the resource of an acknowledgable job is empty, I can not match it back to my processed assets.
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Extensions
PhotoKit
Background Tasks
0
0
392
Mar ’26
PHAssetCreationRequest merges new Burst Photos into "Recently Deleted" instead of Library
Description
I am observing a critical issue when saving burst photos using the Photos Framework. If a burst photo with the same burstIdentifier already exists in the "Recently Deleted" album, any new assets saved via PHAssetCreationRequest are automatically merged into that deleted entry instead of appearing in the main Library or "All Photos."
Environment
Framework: Photos Framework (iOS)
API: [[PHPhotoLibrary sharedPhotoLibrary] performChanges:...]
Code Snippet
The following logic is used to save the burst assets:
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
// 'paths' is a custom object providing the creation request
PHAssetCreationRequest *assetCreationRqst = [paths assetCreationRqst];
assetCreationRqst.favorite = [FavorManager.shared isSetDownloadedAssetFavorite:self.curItem];
PHObjectPlaceholder *placeHolder = assetCreationRqst.placeholderForCreatedAsset;
localIdentifier = placeHolder.localIdentifier;
} completionHandler:^(BOOL success, NSError * _Nullable error) {
if (success) {
// The handler returns success, but the asset is invisible to the user
[weakSelf handleDownloadSuccess:localIdentifier];
}
// ... cleanup and completion ...
}];
Steps to Reproduce
Save a burst photo to the iPhone's built-in Photos app.
Manually delete that burst photo so it moves to the "Recently Deleted" album.
Execute the code above to save the same burst photo (or a new set containing the same burstIdentifier in its metadata).
Check the main Photo Library / "All Photos" view.
Observed Result
The completionHandler returns success = YES, and a localIdentifier is generated.
The photo does not appear in the main Library or "All Photos."
The newly saved photo is silently merged into the existing burst set located inside the "Recently Deleted" folder.
The user cannot see the new photo unless they manually "Restore" the deleted items from the album.
Expected Behavior
PHAssetCreationRequest should always result in a visible asset in the user's Library. Even if a matching burstIdentifier exists in "Recently Deleted," the system should treat the new request as a new independent asset or provide an error, rather than hiding it within a deleted collection.
Topic:
UI Frameworks
SubTopic:
UIKit
Tags:
PhotoKit
5
0
552
Mar ’26
Background Upload Extension Bug on iOS 26.2
While implementing the new background backup feature introduced in iOS 26.1, I create a PHAssetResourceUploadJob in an Extension. On iOS 26.1, the system successfully triggers the upload. However, on iOS 26.2, although the job is created successfully and all related configurations are correctly set, the system does not trigger the upload.
Could you please help confirm the cause of this issue? Thank you.
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Extensions
PhotoKit
1
1
319
Feb ’26
Repeated NUIdentifier crash
Some of our app's users are repeatedly running into a crash on NeutrinoCore -[NUIdentifier initWithNamespace:name:version:] + 2352. It looks from the stack trace like multiple threads are performing PHFetchRequests, but that shouldn't be causing a crash. It's isolated to a small number of users, which makes me think that it's something related to their specific Photos databases (e.g., data corruption.)
Do you have any suggestions how I might be able to resolve this?
2
libsystem_c.dylib
abort + 124
3
NeutrinoCore
-[NUAssertionPolicyCrashReport notifyAssertion:] + 66
4
NeutrinoCore
-[NUAssertionPolicyComposite notifyAssertion:] + 160
5
NeutrinoCore
-[NUAssertionPolicyUnique notifyAssertion:] + 176
6
NeutrinoCore
-[NUAssertionHandler handleFailureInFunction:file:lineNumber:currentlyExecutingJobName:description:arguments:] + 156
7
NeutrinoCore
_NUAssertFailHandler + 176
8
NeutrinoCore
-[NUIdentifier initWithNamespace:name:version:] + 2352
9
NeutrinoCore
-[NUIdentifier initWithName:version:] + 84
10
NeutrinoCore
-[NUIdentifier initWithName:] + 68
11
PhotoImaging
+[PISchema identifier] + 36
12
PhotoImaging
+[PISchema registeredPhotosSchemaIdentifier] + 32
13
PhotoImaging
+[PIPhotoEditHelper newComposition] + 28
14
PhotoImaging
+[PICompositionSerializer deserializeCompositionFromAdjustments:metadata:formatIdentifier:formatVersion:sidecarData:error:] + 160
15
PhotoImaging
+[PICompositionSerializer deserializeCompositionFromData:formatIdentifier:formatVersion:sidecarData:error:] + 224
16
PhotoLibraryServices
-[PLPhotoEditPersistenceManager loadCompositionFrom:formatIdentifier:formatVersion:sidecarData:error:] + 1848
17
PhotoLibraryServices
+[PLPhotoEditPersistenceManager validateAdjustmentData:formatIdentifier:formatVersion:error:] + 108
18
Photos
__167+[PHContentEditingInputRequestContext contentEditingInputRequestContextForAsset:requestID:managerID:networkAccessAllowed:downloadIntent:progressHandler:resultHandler:]_block_invoke + 260
19
Photos
-[PHAdjustmentData(ContentEditingInput) _contentEditing_readableByClientWithVerificationBlock:] + 136
20
Photos
-[PHAdjustmentData(ContentEditingInput) _contentEditing_requiredBaseVersionReadableByClient:verificationBlock:] + 88
21
Photos
-[PHContentEditingInputRequestContext _adjustmentBaseVersionFromResult:request:canHandleAdjustmentData:] + 356
22
Photos
-[PHContentEditingInputRequestContext produceChildRequestsForRequest:reportingIsLocallyAvailable:isDegraded:result:] + 624
23
Photos
-[PHMediaRequestContext _produceChildRequestsForRequest:withResult:] + 88
24
Photos
-[PHMediaRequestContext mediaRequest:didFinishWithResult:] + 92
25
Photos
-[PHAdjustmentDataRequest _finishFromAsynchronousCallback] + 124
26
Photos
__39-[PHAdjustmentDataRequest startRequest]_block_invoke + 584
27
PhotoLibraryServicesCore
__106-[PLAssetsdResourceClient adjustmentDataForAsset:networkAccessAllowed:trackCPLDownload:completionHandler:]block_invoke.84 + 880
28
CoreFoundation
invoking + 148
29
CoreFoundation
-[NSInvocation invoke] + 424
30
Foundation
<deduplicated_symbol> + 16
31
Foundation
-[NSXPCConnection _decodeAndInvokeReplyBlockWithEvent:sequence:replyInfo:] + 528
32
Foundation
__88-[NSXPCConnection _sendInvocation:orArguments:count:methodSignature:selector:withProxy:]_block_invoke_5 + 188
33
libxpc.dylib
_xpc_connection_reply_callout + 124
42
libsystem_pthread.dylib
start_wqthread + 8
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Photos and Imaging
PhotoKit
0
0
647
Feb ’26
Add a value to the Photos Caption field
In the iOS Photos app there is a caption field the user can write to.  How can you write to this value from Swift when creating a photo?
I see apps that do this, but there doesn't seem to be any official way to do this using the Photo library through PHAssetCreationRequest or PHAssetResourceCreationOptions or setting EXIF values, I tried settings a bunch of values there including IPTC values but nothing appears in the caption field in the iOS photos app.
There must be some way to do it since I see other apps setting that value somehow after capturing a photo.
Topic:
UI Frameworks
SubTopic:
General
Tags:
Swift
PhotoKit
AVFoundation
Replies
2
Boosts
1
Views
280
Activity
2d
PHAsset Additional Properties
Following Metadata should be accessible from PHAsset Object: Title, caption, Keywords. Write now they are available in the SQLite Photo Library, but thats is not a clean solution.
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
PhotoKit
Replies
2
Boosts
4
Views
655
Activity
2d
Request photo library authorization popup on macOS Catalyst can't be dismissed
I have an iOS app that I want to publish to the Mac App Store as a Catalyst app, but I noticed a situation where the app can't be closed and has to be force quit.
The problem happens if the user has 0 photos in their Photo Library, and hits "Limited Access" on the request authorization prompt (In my case PHPhotoLibrary.requestAuthorization(for: .readWrite).
Since the popup is a system prompt, I can't manually add a close button to it. I tried wrapping it in a view with a close button but the popup always shows up over any view I'm presenting within my app. If anyone has a workaround that would be greatly appreciated!
Topic:
UI Frameworks
SubTopic:
SwiftUI
Tags:
PhotoKit
Photos and Imaging
macOS
Mac Catalyst
Replies
2
Boosts
0
Views
94
Activity
1w
PHPickerViewController: UI rendering failure and data retrieval errors on iOS 17 & 26.4
Description:
I am encountering critical issues with PHPickerViewController using the "Zero-Permission" configuration. The behavior differs significantly between iOS 17 and iOS 26.4, but both prevent successful image selection.
Observed Behaviors:
On iOS 26.4 (iPhone 17 Pro Max): The PHPicker UI fails to render the photo grid entirely. Upon initialization, the system UI displays an "Unable to load photo" alert, preventing users from even viewing or selecting images.
On iOS 17: The picker UI loads, but after the user selects an image and adds it, the subsequent itemProvider.loadObject call consistently fails, returning an error and preventing our app from retrieving the image data.
Current Implementation:
var config = PHPickerConfiguration()
config.filter = .images
config.selectionLimit = pickLimit
// Problematic logic:
if ABTestManager.shared.isPHPickerCurrent {
config.preferredAssetRepresentationMode = .current
}
let pickerVC = PHPickerViewController(configuration: config)
pickerVC.delegate = self
user device Images:
What I have tested:
I have been using preferredAssetRepresentationMode = .current in my AB tests.
I have not yet tested .compatible mode, as my application logic requires access to high-fidelity assets. However, the current behavior suggests a regression or a fundamental incompatibility with how the system handles image containers for high-end hardware (e.g., iPhone 17 Pro Max) in the out-of-process picker.
Supporting Documentation:
Minimal Reproducible Project: [Attached]
Logs: [Attached sysdiagnose logs]
My Questions:
Is the "Unable to load photo" UI failure on iOS 26.4 a known limitation for certain high-resolution asset types when using .current mode?
Are there specific handling requirements for NSItemProvider when the system fails to resolve the image data in .current mode on older iOS 17 devices?
Given that these failures occur in a "Zero-Permission" context, are there specific metadata or image processing constraints I should be aware of to prevent the picker from entering a "failed" state?
Topic:
UI Frameworks
SubTopic:
UIKit
Tags:
PhotoKit
Replies
2
Boosts
1
Views
217
Activity
2w
Best practice for rapid sequential Live Photo captures with AVCapturePhotoOutput?
Hi everyone,
I’m working on a camera app as a learning project and have reached a point where I’m trying to better understand the intended architecture for Live Photo capture using AVCapturePhotoOutput.
The app currently supports:
Live Photos
Depth data
Location metadata
Multiple lens presets on a virtual multi-camera device
Everything is working well, but I’m now thinking about capture throughput and rapid shutter presses.
Right now, my implementation is fairly conservative. I wait for a Live Photo capture to finish processing and importing before allowing another capture. This is reliable, but it doesn’t feel particularly camera-like when compared to Apple’s Camera app.
One observation from field testing caught my attention:
I took a Live Photo, immediately switched lenses, then took another Live Photo. When I viewed the first Live Photo later, the movie portion included the lens-switching actions that occurred after I pressed the shutter.
That made me realize that I may be thinking about the capture lifecycle incorrectly.
My questions are:
When using AVCapturePhotoOutput with Live Photos enabled, what is the earliest point at which a capture can be considered “safely secured”?
Is it expected that apps wait for PhotoKit import to complete before accepting another Live Photo capture request?
If supporting rapid sequential shutter presses, is the recommended approach to queue capture requests and process them one at a time?
Are there any best practices around lens changes or camera reconfiguration while a Live Photo is still being captured or processed?
I’m not looking for details about the implementation of Apple’s Camera app. I’m mainly trying to understand the recommended approach when working with the public AVFoundation APIs.
I’d appreciate any guidance, documentation references, or examples from developers who have worked through similar problems.
Thanks!
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
AVFoundation
PhotoKit
Camera
Photos and Imaging
Replies
1
Boosts
0
Views
362
Activity
3w
PHAssetResourceUploadJobChangeRequest doesn't upload iCloud-optimized photos — is this expected?
I'm implementing PHBackgroundResourceUploadExtension to back up photos and videos to our cloud storage service.
During testing, I observed that iCloud-optimized photos (where the full-resolution original is stored in iCloud, not on device) do not upload. The upload job appears to silently skip these assets.
Questions:
Is this behavior intentional/documented? I couldn't find explicit mention of this limitation.
If the device only has the optimized/thumbnail version locally, does the system:
- Automatically download the full-resolution asset from iCloud before uploading?
- Skip the asset entirely?
- Return an error via PHAssetResourceUploadJobChangeRequest?
For a complete backup solution, should we:
- Pre-fetch full-resolution assets using PHAssetResourceManager.requestData(for:options:) before creating upload jobs?
- Use a hybrid approach (this extension for local assets + separate logic for iCloud-only assets)?
Environment: iOS 26, Xcode 18
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Extensions
PhotoKit
Background Tasks
Replies
1
Boosts
1
Views
487
Activity
Jun ’26
How to upload large videos with PHAssetResourceUploadJobChangeRequest?
I'm implementing a PHBackgroundResourceUploadExtension to back up photos and videos from the user's library to our cloud storage service.
Our existing upload infrastructure uses chunked uploads for large files (splitting videos into smaller byte ranges and uploading each chunk separately). This approach:
Allows resumable uploads if interrupted
Stays within server-side request size limits
Provides granular progress tracking
Looking at the PHAssetResourceUploadJobChangeRequest.createJob(destination:resource:) API, I don't see a way to specify byte ranges or create multiple jobs for chunks of the same resource.
Questions:
Does the system handle large files (1GB+) automatically under the hood, or is there a recommended maximum file size for a single upload job?
Is there a supported pattern for chunked/resumable uploads, or should the destination URL endpoint handle the entire file in one request?
If our server requires chunked uploads (e.g., BITS protocol with CreateSession → Fragment → CloseSession), is this extension the right mechanism, or should we use a different approach for large videos?
Any guidance on best practices for large asset uploads would be greatly appreciated.
Environment: iOS 26, Xcode 18
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Extensions
PhotoKit
Background Tasks
Replies
5
Boosts
1
Views
1.2k
Activity
Jun ’26
A few issues with the iPhone Photos app
I’m curious what framework and rendering technique you’re using for the photo album’s grid zoom in and out. Why is it so incredibly smooth? I can’t seem to pull that off 🤦‍♂️
Topic:
App & System Services
SubTopic:
General
Tags:
Media
Photos and Imaging
PhotoKit
Replies
2
Boosts
0
Views
284
Activity
May ’26
PHPickerConfiguration.preselectedAssetIdentifiers not work
let authStatus = PHPhotoLibrary.authorizationStatus(for: .readWrite)
let fetchResult = PHAsset.fetchAssets(withLocalIdentifiers: selectedAssetIDs, options: nil)
print("[AlbumCreation] authStatus=\(authStatus.rawValue) IDs=\(selectedAssetIDs.count) PHAsset匹配=\(fetchResult.count)") // result is:  [AlbumCreation] authStatus=3 IDs=3 PHAsset匹配=3
var config = PHPickerConfiguration(photoLibrary: .shared())
config.preselectedAssetIdentifiers = selectedAssetIDs
config.selectionLimit = 0
let picker = PHPickerViewController(configuration: config)
picker.delegate = self
present(picker, animated: true)
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
PhotoKit
Replies
1
Boosts
0
Views
380
Activity
May ’26
PHPhotosErrorDomain Code: 3302 started affecting my users recently.
Recently I received multiple user email supports because the app cannot save video to photos, they are all on iOS 26.x
The code in my app around recording video and saving to Photos hasn't changed in years.
I'm not able to reproduce it locally, I tried on all my available devices.
In recently published build I added additional logs and it appears that all of cases that fail with 3302 have the photos access set to "Limited Access". It never happens to users with "Full Access".
In that build I also added a fallback, when saving to photos fails, the app saves to Documents and it seems it works (two of my users affected users confirmed it), but it's very unfortunate. I think it kind of proves that videos aren't broken given that users are able to play them just fine.
On of users says that for him saving to Photos works for 2-3 times after he reinstalls the app and then it stops working.
Did anything recently changed in how we should save videos to photos?
I'm using the following code. I can see in git blame that I haven't changed in since 2020 and never encountered those errors in development or heard about those issues until around 1 month ago.
Thank you.
PHPhotoLibrary.shared().performChanges {
PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: fileURL)
} completionHandler: { success, error in
Topic:
Media Technologies
SubTopic:
Video
Tags:
PhotoKit
AVFoundation
Replies
2
Boosts
0
Views
387
Activity
Apr ’26
Trying to load image & identifier from photo library with PhotosPicker
I'm updating an older Mac app written in Objective C and OpenGL to be a mutliplatform app in SwiftUI and Metal.
The app loads images and creates kaleidoscope animations from them.
It is a document-based application, and saves info about the kaleidoscope into the document. On macOS, it creates a security-scoped bookmark to remember the user's chosen image.
On iOS, I use a PhotosPicker to have the user choose an image from their photo library to use. I would like to get the itemIdentifier from the image they choose and save that into my document so I can use it to fetch the image when the user reloads the kaleidoscope document in the future.
However, the call to loadTransferable is returning nil for the  itemIdentifier. Here is my iOS/iPadOS code:
#if os(macOS)
// Mac code
#else
PhotosPicker("Choose image", selection: $selectedItem, matching: .images)
.onChange(of: selectedItem) {
Task {
if let newValue = selectedItem {
scopeState.isHEIC =  newValue.supportedContentTypes.contains(UTType.heic)
let data = try? await newValue.loadTransferable(type: Data.self)
print("newValue = \(newValue)")
print("newValue.supportedContentTypes = \(newValue.supportedContentTypes)")
scopeState.selectedImageID = newValue.itemIdentifier
scopeState.selectedImageData = data
}
}
}
#endif
The debug print statements show:
newValue = PhotosPickerItem(_itemIdentifier: "9386762B-C241-4EE2-9942-BC04017E35C1/L0/001", _shouldExposeItemIdentifier: false, _supportedContentTypes: [<_UTCoreType 0x20098cd40> public.png (not dynamic, declared), <UTType 0x11e4ec060> com.apple.private.photos.thumbnail.standard (not dynamic, declared), <UTType 0x11e4ec150> com.apple.private.photos.thumbnail.low (not dynamic, declared)], _content: _PhotosUI_SwiftUI.PhotosPickerItem.(unknown context at $1e75ee3bc).Content.result(PhotosUI.PHPickerResult(itemProvider: <PUPhotosFileProviderItemProvider: 0x11d2bd680> {types = (
"public.png",
"com.apple.private.photos.thumbnail.standard",
"com.apple.private.photos.thumbnail.low"
)}, _objcResult: <PHPickerResult: 0x11b18cff0>)))
newValue.supportedContentTypes = [<_UTCoreType 0x20098cd40> public.png (not dynamic, declared), <UTType 0x11e4ec060> com.apple.private.photos.thumbnail.standard (not dynamic, declared), <UTType 0x11e4ec150> com.apple.private.photos.thumbnail.low (not dynamic, declared)]
And the returned item has a nil itemIdentifier. (note the _shouldExposeItemIdentifier=false in the log of the selected item).
How do I get the itemIdentifier for the user's chosen image?
And is that valid to then fetch the asset when the user reloads their document? Is it like a security-scoped bookmark on macOS, where the itemIdentifier is like a key that gives me permission to reload the image?
If not, what do I need to do in order to reload the image the next time the user opens a saved kaleidoscope document?
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Media
Photos and Imaging
PhotoKit
Replies
1
Boosts
0
Views
1k
Activity
Apr ’26
Clarification on Disk Write Limits (bug_type 145) and Cross-Volume Write Amplification
Hello Apple Developer Support and Community,
I am a senior software engineer investigating a Disk Writes Resource Violation (bug_type 145) for a photo-management application (BeePhotos v2.3.0). We observed a violation where the app dirtied approximately 1GB of file-backed memory in just 48 seconds, triggering a resource report.
[Core Diagnostic Data]
The following data is extracted from the .crash report:
Event: disk writes
Action taken: none
Writes caused: 1073.96 MB over 48.28s (Average: 22.24 MB/second)
System Limit: 1073.74 MB over 86,400 seconds (Daily limit)
Device: iPhone 15 Pro (iPhone16,2)
OS Version: iOS 26.4 (Build 23E244)
Free Space: 3852.25 MB (Approx. 3.8 GB)
[Implementation Details]
Our application performs the following sequence for a 1GB video download:
Download: Uses NSURLSessionDownloadTask to download the file to the system-provided location URL (in the /tmp or com.apple.nsurlsessiond directory).
Move: In didFinishDownloadingToURL, we move the file to the App’s sandbox Library/Caches directory using FileManager.default.moveItem(at:to:).
Save: We then add the file to the Photo Library via PHAssetCreationRequest.addResource(with:fileURL:options:) using the local URL in Library/Caches.
[Technical Questions]
I suspect the 1GB download is being "amplified" into ~3GB of total physical writes, and I would like to confirm the following:
Cross-Volume Move: Does moving a file from the nsurlsessiond managed temporary directory to the App’s sandbox Library/Caches constitute a Cross-Volume Move on APFS? If so, does this effectively double the write count (1GB download + 1GB copy-on-move)?
PHPhotoLibrary Ingestion: When using PHAssetCreationRequest, does the system perform another 1:1 data copy of the source file into the assets database? Would this result in a 3rd GB of writing?
Low Disk Space Impact: Given the device only had 3.85 GB free, does the system’s "low disk space" state (near the 150MB threshold) increase the overhead for metadata updates or physical write amplification that counts towards this limit?
Best Practices: To stay within the daily 1GB budget for high-resolution media, is it recommended to call PHAssetCreationRequest directly using the location URL from didFinishDownloadingToURL to avoid intermediary copies? Are there any permission or lifecycle risks with this approach?
Any insights from the Apple engineering team or the community on how to minimize the write footprint during high-speed ingestion would be highly appreciated.
Best regards
Topic:
App & System Services
SubTopic:
Core OS
Tags:
Files and Storage
PhotoKit
Replies
1
Boosts
0
Views
274
Activity
Apr ’26
macOS 26.4 regression with Mac Catalyst apps using PhotoKit: Photos do not appear when using limited access - Failed to get sandbox extension for url - Image request failed with error PHPhotosErrorDomain Code 3303
I just submitted FB22318443. In Mac Catalyst apps running on macOS 26.4, if you choose to limit the app's access to specific photos (as opposed to granting full access), the photos do not appear in the app. 💀
This issue does not occur on iPadOS. It is a macOS 26.4 regression. It occurs even with apps built using a previous version of the SDK such as 26.2.
A sample of the console logs:
[RM]: 4-1-1 failed to decode for asset: 9290CC20-B85D-47B5-BDBE-D330FE61773D, error code: 3303, description: Error Domain=PHPhotosErrorDomain Code=3303 "(null)"
Failed to get sandbox extension for url: file:///Users/Jordan/Pictures/Photos%20Library.photoslibrary/resources/derivatives/masters/9/9290CC20-B85D-47B5-BDBE-D330FE61773D_4_5005_c.jpeg, error: Error Domain=com.apple.photos.error Code=44001 "sandbox extension not in the cache after requesting them for path: /Users/Jordan/Pictures/Photos Library.photoslibrary/resources/derivatives/masters/9/9290CC20-B85D-47B5-BDBE-D330FE61773D_4_5005_c.jpeg" UserInfo={NSDebugDescription=sandbox extension not in the cache after requesting them for path: /Users/Jordan/Pictures/Photos Library.photoslibrary/resources/derivatives/masters/9/9290CC20-B85D-47B5-BDBE-D330FE61773D_4_5005_c.jpeg}
[RM]: 1-1-1 Image request failed with error: Error Domain=PHPhotosErrorDomain Code=3303 "(null)"
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
macOS
Mac Catalyst
Photos and Imaging
PhotoKit
Replies
0
Boosts
0
Views
692
Activity
Mar ’26
How to get iCloud item(photo/video) size?
How I can get iCloud photo file size?
Could I use private API like this in prod? Does anyone know another way? (without downloading the file to the device)
func getFileSize(asset: PHAsset) -> Int64? {
let resources = PHAssetResource.assetResources(for: asset)
let resource = resources.first
let size = resource?.value(forKey: "fileSize") as? Int64
return size
}
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
PhotoKit
Replies
1
Boosts
0
Views
331
Activity
Mar ’26
Implementing PHBackgroundResourceUploadExtension
Hi,
I am trying to implement a PHBackgroundResourceUploadExtension to upload backup media files to an external cloud service based on these docs: https://developer.apple.com/documentation/PhotoKit/uploading-asset-resources-in-the-background#Acknowledge-completed-jobs
Creating jobs and actual uploading is working as expected, but the problem I have is in the acknowledgeCompletedJobs() function.
When trying to access a job's resource, the resource is nil and thus has empty assetLocalIdentifier and originalFilename.
Did anybody successfully implement this extension or knows, why this would happen? Because the resource of an acknowledgable job is empty, I can not match it back to my processed assets.
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Extensions
PhotoKit
Background Tasks
Replies
1
Boosts
0
Views
528
Activity
Mar ’26
Does PhotoKit provide access to People, Places, and Shared Albums?
I know how to search for Smart Albums (favorites, selfies, etc...) containing photos:
// Get smart albums
PHFetchResult *smartAlbums = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum subtype:PHAssetCollectionSubtypeAlbumRegular options:nil];
I have the following questions:
Is there a way to enumerate the People Smart Albums and access the photos in a specific People Smart Album?
Is there a way to enumerate the Places Smart Albums and access the photos in a specific Place Smart Album?
Is there a way to enumerate Shared Albums (shared to the current iCloud user) and access the photos in a specific Shared Album?
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
PhotoKit
Replies
1
Boosts
2
Views
958
Activity
Mar ’26
Implementing PHBackgroundResourceUploadExtension
Hi,
I am trying to implement a PHBackgroundResourceUploadExtension to upload backup media files to an external cloud service based on these docs: https://developer.apple.com/documentation/PhotoKit/uploading-asset-resources-in-the-background#Acknowledge-completed-jobs
Creating jobs and actual uploading is working as expected, but the problem I have is in the acknowledgeCompletedJobs() function.
When in this function, I am trying to access a job's resource. The resource is nil and thus has empty assetLocalIdentifier and originalFilename.
Did anybody successfully implement this extension or knows, why this would happen? Because the resource of an acknowledgable job is empty, I can not match it back to my processed assets.
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Extensions
PhotoKit
Background Tasks
Replies
0
Boosts
0
Views
392
Activity
Mar ’26
PHAssetCreationRequest merges new Burst Photos into "Recently Deleted" instead of Library
Description
I am observing a critical issue when saving burst photos using the Photos Framework. If a burst photo with the same burstIdentifier already exists in the "Recently Deleted" album, any new assets saved via PHAssetCreationRequest are automatically merged into that deleted entry instead of appearing in the main Library or "All Photos."
Environment
Framework: Photos Framework (iOS)
API: [[PHPhotoLibrary sharedPhotoLibrary] performChanges:...]
Code Snippet
The following logic is used to save the burst assets:
[[PHPhotoLibrary sharedPhotoLibrary] performChanges:^{
// 'paths' is a custom object providing the creation request
PHAssetCreationRequest *assetCreationRqst = [paths assetCreationRqst];
assetCreationRqst.favorite = [FavorManager.shared isSetDownloadedAssetFavorite:self.curItem];
PHObjectPlaceholder *placeHolder = assetCreationRqst.placeholderForCreatedAsset;
localIdentifier = placeHolder.localIdentifier;
} completionHandler:^(BOOL success, NSError * _Nullable error) {
if (success) {
// The handler returns success, but the asset is invisible to the user
[weakSelf handleDownloadSuccess:localIdentifier];
}
// ... cleanup and completion ...
}];
Steps to Reproduce
Save a burst photo to the iPhone's built-in Photos app.
Manually delete that burst photo so it moves to the "Recently Deleted" album.
Execute the code above to save the same burst photo (or a new set containing the same burstIdentifier in its metadata).
Check the main Photo Library / "All Photos" view.
Observed Result
The completionHandler returns success = YES, and a localIdentifier is generated.
The photo does not appear in the main Library or "All Photos."
The newly saved photo is silently merged into the existing burst set located inside the "Recently Deleted" folder.
The user cannot see the new photo unless they manually "Restore" the deleted items from the album.
Expected Behavior
PHAssetCreationRequest should always result in a visible asset in the user's Library. Even if a matching burstIdentifier exists in "Recently Deleted," the system should treat the new request as a new independent asset or provide an error, rather than hiding it within a deleted collection.
Topic:
UI Frameworks
SubTopic:
UIKit
Tags:
PhotoKit
Replies
5
Boosts
0
Views
552
Activity
Mar ’26
Background Upload Extension Bug on iOS 26.2
While implementing the new background backup feature introduced in iOS 26.1, I create a PHAssetResourceUploadJob in an Extension. On iOS 26.1, the system successfully triggers the upload. However, on iOS 26.2, although the job is created successfully and all related configurations are correctly set, the system does not trigger the upload.
Could you please help confirm the cause of this issue? Thank you.
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Extensions
PhotoKit
Replies
1
Boosts
1
Views
319
Activity
Feb ’26
Repeated NUIdentifier crash
Some of our app's users are repeatedly running into a crash on NeutrinoCore -[NUIdentifier initWithNamespace:name:version:] + 2352. It looks from the stack trace like multiple threads are performing PHFetchRequests, but that shouldn't be causing a crash. It's isolated to a small number of users, which makes me think that it's something related to their specific Photos databases (e.g., data corruption.)
Do you have any suggestions how I might be able to resolve this?
2
libsystem_c.dylib
abort + 124
3
NeutrinoCore
-[NUAssertionPolicyCrashReport notifyAssertion:] + 66
4
NeutrinoCore
-[NUAssertionPolicyComposite notifyAssertion:] + 160
5
NeutrinoCore
-[NUAssertionPolicyUnique notifyAssertion:] + 176
6
NeutrinoCore
-[NUAssertionHandler handleFailureInFunction:file:lineNumber:currentlyExecutingJobName:description:arguments:] + 156
7
NeutrinoCore
_NUAssertFailHandler + 176
8
NeutrinoCore
-[NUIdentifier initWithNamespace:name:version:] + 2352
9
NeutrinoCore
-[NUIdentifier initWithName:version:] + 84
10
NeutrinoCore
-[NUIdentifier initWithName:] + 68
11
PhotoImaging
+[PISchema identifier] + 36
12
PhotoImaging
+[PISchema registeredPhotosSchemaIdentifier] + 32
13
PhotoImaging
+[PIPhotoEditHelper newComposition] + 28
14
PhotoImaging
+[PICompositionSerializer deserializeCompositionFromAdjustments:metadata:formatIdentifier:formatVersion:sidecarData:error:] + 160
15
PhotoImaging
+[PICompositionSerializer deserializeCompositionFromData:formatIdentifier:formatVersion:sidecarData:error:] + 224
16
PhotoLibraryServices
-[PLPhotoEditPersistenceManager loadCompositionFrom:formatIdentifier:formatVersion:sidecarData:error:] + 1848
17
PhotoLibraryServices
+[PLPhotoEditPersistenceManager validateAdjustmentData:formatIdentifier:formatVersion:error:] + 108
18
Photos
__167+[PHContentEditingInputRequestContext contentEditingInputRequestContextForAsset:requestID:managerID:networkAccessAllowed:downloadIntent:progressHandler:resultHandler:]_block_invoke + 260
19
Photos
-[PHAdjustmentData(ContentEditingInput) _contentEditing_readableByClientWithVerificationBlock:] + 136
20
Photos
-[PHAdjustmentData(ContentEditingInput) _contentEditing_requiredBaseVersionReadableByClient:verificationBlock:] + 88
21
Photos
-[PHContentEditingInputRequestContext _adjustmentBaseVersionFromResult:request:canHandleAdjustmentData:] + 356
22
Photos
-[PHContentEditingInputRequestContext produceChildRequestsForRequest:reportingIsLocallyAvailable:isDegraded:result:] + 624
23
Photos
-[PHMediaRequestContext _produceChildRequestsForRequest:withResult:] + 88
24
Photos
-[PHMediaRequestContext mediaRequest:didFinishWithResult:] + 92
25
Photos
-[PHAdjustmentDataRequest _finishFromAsynchronousCallback] + 124
26
Photos
__39-[PHAdjustmentDataRequest startRequest]_block_invoke + 584
27
PhotoLibraryServicesCore
__106-[PLAssetsdResourceClient adjustmentDataForAsset:networkAccessAllowed:trackCPLDownload:completionHandler:]block_invoke.84 + 880
28
CoreFoundation
invoking + 148
29
CoreFoundation
-[NSInvocation invoke] + 424
30
Foundation
<deduplicated_symbol> + 16
31
Foundation
-[NSXPCConnection _decodeAndInvokeReplyBlockWithEvent:sequence:replyInfo:] + 528
32
Foundation
__88-[NSXPCConnection _sendInvocation:orArguments:count:methodSignature:selector:withProxy:]_block_invoke_5 + 188
33
libxpc.dylib
_xpc_connection_reply_callout + 124
42
libsystem_pthread.dylib
start_wqthread + 8
Topic:
Media Technologies
SubTopic:
Photos & Camera
Tags:
Photos and Imaging
PhotoKit
Replies
0
Boosts
0
Views
647
Activity
Feb ’26
First
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