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.

Posts under PhotoKit tag

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App cannot fetch any resource after a while
Hi everyone, We came an issue that, In some scenarios in our app we cannot fetch any resources from device (Photo and Contact). One case we catched is putting app in background and spending time in other commonly used apps and coming back to our app cause this issue but there is a small chance that get this issue during using the application. In cell, we are trying to fetch the image like this imageFetchTask = Task { let image = await CompositionRoot.shared.photosManager.image(requestType: .imageCollections, forId: photoAsset.photoId) self.photoImageView.image(image) } and inner layers of this code we get the PHAsset and request image PHAsset.firstAsset(for: id) let manager = PHImageManager.default() manager.requestImage(for: asset, targetSize: request.targetSize, contentMode: .aspectFill, options: request.options) { (image, info) in continuation.resume(returning: image) } We figured out that issue not happening only in Photos also Contacts and any web request. So any help according to this situation is well appreciated. Thanks
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514
Dec ’24
Keyboard Navigation Not Working for inline PhotosPicker
We are using inline PhotosPicker introduced with iOS 17.0. The accessbility navigation using touch gestures work fine but the navigation through Keyboard doesn't work properly. The tab/arrow based Keyboard navigation can't move from native app process to inline PhotosUI process or vice versa. This is logged as a high severity bug by our accessibility team. Please look into this. Sample code for repro: https://github.com/saalisumer/AccessibilityIssueInlinePhotoPickerIOS Repro video: https://github.com/saalisumer/AccessibilityIssueInlinePhotoPickerIOS/blob/main/Simulator%20Screen%20Recording%20-%20iPhone%2015%20Pro%20-%202024-12-16%20at%2016.27.48.mp4
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531
Dec ’24
Runtime race condition warning when calling PHPhotoLibrary.shared().performChanges async
I have enabled runtime concurrency warnings to check for future problems concerning concurrency: Build Setting / Other Swift Flags: -Xfrontend -warn-concurrency -Xfrontend -enable-actor-data-race-checks When trying to call the async form of PHPhotoLibrary.shared().performChanges{} I get the following runtime warning: warning: data race detected: @MainActor function at ... was not called on the main thread in the line containing performChanges. My sample code inside a default Xcode multi platform app template is as follows: import SwiftUI import Photos @MainActor class FotoChanger{     func addFotos() async throws{         await PHPhotoLibrary.requestAuthorization(for: .addOnly)         try! await PHPhotoLibrary.shared().performChanges{             let data = NSDataAsset(name: "Swift")!.data             let creationRequest = PHAssetCreationRequest.forAsset()             creationRequest.addResource(with: .photo, data: data, options: PHAssetResourceCreationOptions())         }     } } struct ContentView: View {     var body: some View {         ProgressView()             .task{                 try! await FotoChanger().addFotos()             }     } } You would have to have a Swift data asset inside the asset catalog to run the above code, but the error can even be recreated if the data is invalid. But what am I doing wrong? I have not found a way to run perform changes, the block or whatever causes the error on the main thread. PS: This is only test code to show the problem, don't mind the forced unwraps.
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2.4k
Dec ’24
[PHCollectionList isPrivacySensitiveAlbum]: unrecognized selector crash
I cannot find anything documentation re: isPrivacySensitiveAlbum. I've granted my app access to all photos. Not sure what else to try Code that triggers the crash: let options = PHFetchOptions() options.fetchLimit = 1 let assetColl = PHAssetCollection.fetchAssetCollections(withLocalIdentifiers: [localId], options: options) if assetColl.count > 0 { if let asset = PHAsset.fetchKeyAssets(in: assetColl.firstObject!, options: options) stack trace from here on `2023-04-15 06:34:41.628537-0700 DPF[33615:6484880] -[PHCollectionList isPrivacySensitiveAlbum]: unrecognized selector sent to instance 0x7ff09232aec0 2023-04-15 06:34:41.632378-0700 DPF[33615:6484880] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[PHCollectionList isPrivacySensitiveAlbum]: unrecognized selector sent to instance 0x7ff09232aec0' *** First throw call stack: ( 0 CoreFoundation 0x00007ff80045478b __exceptionPreprocess + 242 1 libobjc.A.dylib 0x00007ff80004db73 objc_exception_throw + 48 2 CoreFoundation 0x00007ff8004638c4 +[NSObject(NSObject) instanceMethodSignatureForSelector:] + 0 3 CoreFoundation 0x00007ff800458c66 ___forwarding___ + 1443 4 CoreFoundation 0x00007ff80045ae08 _CF_forwarding_prep_0 + 120 5 Photos 0x00007ff80b8480e1 +[PHAsset fetchKeyAssetsInAssetCollection:options:] + 86 6 DPF 0x0000000100791029 $s3DPF16AlbumListFetcherV22loadKeyImageForLocalIdySo7UIImageCSgSSYaFTY0_ + 569`
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861
Dec ’24
Message from com.apple.photos.backend (PhotoKit) in log
Hello Our application is backing up the user photos to some back end. When retrieving the asset data from the Photo Library, we set the flag 'accessNetworkAllowed' to true to get the assets that might be optimized in iCloud. In the application logs, we can see the message below, and it shows as coming from com.apple.photos.backend (PhotoKit) Missing prefetched properties for PHAssetAdjustmentProperties on <PHAsset: 0x160b1ec00> BCF5688F-F7A7-4196-AFC7-A84E8BD95F3E/L0/001 mediaType=1/0, sourceType=1, (5601x3734), creationDate=2022-01-24 23:36:05 +0000, location=0, hidden=0, favorite=0, adjusted=0 . Fetching on demand on the main queue, which may degrade performance. In particular, the message says 'Fetching on demand on the main queue' but I'm not sure if that means that PhotoKit will fetch on main queue or if that mean that our application is requesting the data on main queue. Anyone could clarify? thanks
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853
Dec ’24
How to add CIFilter to AVCaptureDeferredPhotoProxy
Hello, I m trying to implement deferred photo processing in my photo capture app. After I take a photo, I pass it through a CIFilter, now with the Deferred Photo Processing where would I pass the resulting photo through the CIFilter? Since there is no way for me to know when the system has finished processing a photo. If I have to do it in my app foreground every time, how do I prevent a scenario, where the user takes a photo, heads straight to the Photos App and sees the image without the filter?
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679
Dec ’24
PHPhotoLibrary availability detection/notification
Hi, I'm having difficulties figuring out how I can reliably detect if the macOS system PHPhotoLibrary is available. If I place the system Photo Library on an external drive and then eject it, other apps on startup, such as Photos, will tell me that the library isn't available. How can I replicate this behavior? The only API I can find for this detection on startup is "PHPhotoLibrary.shared().unavailabilityReason". However this always returns nil. Another strange behavior is if I register a PHPhotoLibraryAvailabilityObserver class on startup when the library is available and then eject the drive, I do get a notification via photoLibraryDidBecomeUnavailable, but then directly after the call the app is terminated. This prevents the app to perform any kind of graceful termination. Is this the expected behavior? It would make sense that it's up to the developer to decide what happens if the library becomes unavailable. Thanks
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626
Nov ’24
PHPhoto localIdentifier to cloudIdentifier conversion
The sample code in the Apple documentation found in  PHCloudIdentifier does not compile in xCode 13.2.1. Can the interface for identifier conversion be clarified so that the answer values are more accessible/readable. The values are 'hidden' inside a Result enum It was difficult (for me) to rewrite the sample code because I made the mistake of interpreting the Result type as a tuple. Result type is really an enum. Using the Result type as the return from library.cloudIdentifierMappings(forLocalIdentifiers: ) and .localIdentifierMappings( for: ) puts the actual mapped identifiers inside the the enum where they need additional access via a .stringValue message or an evaluation of an element of the result enum. For others finding the same compile issue, here is a working version of the sample code. This compiles in xCode 13.2.1. func localId2CloudId(localIdentifiers: [String]) -> [String] {         var mappedIdentifiers = [String]()        let library = PHPhotoLibrary.shared()         let iCloudIDs = library.cloudIdentifierMappings(forLocalIdentifiers: localIdentifiers)         for aCloudID in iCloudIDs {           let cloudResult: Result = aCloudID.value             // Result is an enum .. not a tuple             switch cloudResult {                 case .success(let success):                     let newValue = success.stringValue                     mappedIdentifiers.append(newValue)                 case .failure(let failure):                     // do error notify to user                       }         }         return mappedIdentifiers     } ``` swift func func cloudId2LocalId(assetCloudIdentifiers: [PHCloudIdentifier]) -> [String] {             // patterned error handling per documentation         var localIDs = [String]()         let localIdentifiers: [PHCloudIdentifier: Result<String, Error>]  = PHPhotoLibrary.shared() .localIdentifierMappings(                   for: assetCloudIdentifiers)         for cloudIdentifier in assetCloudIdentifiers {             guard let identifierMapping = localIdentifiers[cloudIdentifier] else {                 print("Failed to find a mapping for \(cloudIdentifier).")                 continue             }             switch identifierMapping {                 case .success(let success):                     localIDs.append(success)                 case .failure(let failure) :                     let thisError = failure as? PHPhotosError                     switch thisError?.code {                         case .identifierNotFound:                             // Skip the missing or deleted assets.                             print("Failed to find the local identifier for \(cloudIdentifier). \(String(describing: thisError?.localizedDescription)))")                         case .multipleIdentifiersFound:                             // Prompt the user to resolve the cloud identifier that matched multiple assets.                             print("Found multiple local identifiers for \(cloudIdentifier). \(String(describing: thisError?.localizedDescription))") //                            if let selectedLocalIdentifier = promptUserForPotentialReplacement(with: thisError.userInfo[PHLocalIdentifiersErrorKey]) { //                                localIDs.append(selectedLocalIdentifier)                         default:                             print("Encountered an unexpected error looking up the local identifier for \(cloudIdentifier). \(String(describing: thisError?.localizedDescription))")                     }               }             }         return localIDs     }
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945
Nov ’24
How to change PHLivePhoto EXIF metadata
I have an app that allows the user to change a photo’s EXIF metadata. To do this, I request a content editing input, get the full size image, modify its properties, create a content editing output, write the output image to the rendered content URL, then call performChanges on the PHPhotoLibrary creating an asset change request for that asset setting its content editing output. This works as expected for regular photos but Live Photos get turned off converted to a regular photo. To address this, I’m doing something similar by changing the properties of the .photo image in the Live Photo. I detect when the content editing input has a Live Photo, create a Live Photo editing context, set a frame processor that returns the frame’s image after setting its properties to the updated properties when the frame type is photo, then I create the content editing output and save the Live Photo to that output. It modifies the Live Photo successfully, but the metadata is not updated. If you get the full size image again the properties are the original properties. If you look at the EXIF metadata using an app like Metapho it remains unchanged. What am I doing wrong here? Thanks! let imageURL = contentEditingInput.fullSizeImageURL! let inputImage = CIImage(contentsOf: imageURL, options: [.applyOrientationProperty: true])! var metadata: [AnyHashable: Any] = inputImage.properties // Edit the metadata as desired... let editingContext = PHLivePhotoEditingContext(livePhotoEditingInput: contentEditingInput)! editingContext.frameProcessor = { frame, error -> CIImage? in // Edit only the still photo if frame.type == .photo { return frame.image.settingProperties(metadata) } return frame.image } let contentEditingOutput = try await withCheckedThrowingContinuation { continuation in let editingOutput = PHContentEditingOutput(contentEditingInput: contentEditingInput) editingOutput.adjustmentData = adjustmentData editingContext.saveLivePhoto(to: editingOutput) { success, error in if success { continuation.resume(returning: editingOutput) } else { continuation.resume(throwing: error!) } } } try await PHPhotoLibrary.shared().performChanges { let request = PHAssetChangeRequest(for: asset) request.contentEditingOutput = contentEditingOutput }
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651
Nov ’24
How to edit gain map image to preserve HDR in Live Photo
I have an app that allows you to edit your photos. To preserve HDR, I edit both the SDR image and gain map image, like so: let sdrImage = CIImage(data: data, options: [.applyOrientationProperty: true]) let gainMapImage = CIImage(data: data, options: [.applyOrientationProperty: true, .auxiliaryHDRGainMap: true]) // edit them... try CIContext().writeHEIFRepresentation(of: sdrImage, to: url, format: .RGBA8, colorSpace: colorSpace, options: [.hdrGainMapImage: gainMapImage]) I also support editing the still photo in Live Photos. To do this you create a PHLivePhotoEditingContext, set the frameProcessor block which gives you a CIImage that I edit when the frame.type is .photo, then you create a PHContentEditingOutput and call saveLivePhoto. I’m not seeing any way to preserve HDR here. Interestingly the frame processor is called twice with .photo frame.type, but I don’t see any difference between these images. How can I edit a gain map image to preserve HDR in the still photo of a Live Photo?
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841
Nov ’24
LivePhoto not applying on iOS 17+ as live wallpaper
Hi fellow iOS developers! 👋 I've written a Swift code that converts a video (from a URL) into a Live Photo after downloading it. The conversion process seems fine, but when I try to set the generated Live Photo as a wallpaper on iOS 17+, it shows the message 'Motion not Available.' Has anyone else experienced this issue or know why this might be happening? Could it be related to changes in iOS 17 Live Photo handling or the generated file structure? Any help or suggestions would be greatly appreciated! 🙏
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589
Nov ’24
PhotosPickerItem loadTransferable Progress is always indeterminate
I tried several times to use the PhotosPickerItem loadTransferable function with the goal of receiving some progress value especially when loading large video media. However, the Progress object returned by the function has always isIndeterminate == true and so doesn't have any progress value to observe. Is there some way to make it work ? Some configuration I might have overlooked ? Or is it just not working I might have to revert back to the UIKit photo picker because of this
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718
Nov ’24
PHAssetCollectionChangeRequest.removeAssets Does Not Work
Hello! I am trying to remove a photo from my Photos Library using PhotosUI. I run into this error when I attempt to delete it: "Error returned from daemon: Error Domain=com.apple.accounts Code=7 "(null)"" No photos access scope requirements declared for changes Failed to log access with error: access= accessor:<> identifier:82068C12-FD10-4DE2-9867-B4406FBFB706 kind:intervalEvent timestampAdjustment:0 visibilityState:0 assetIdentifierCount:0 accessCount:0 tccService:kTCCServicePhotos, error=Error Domain=NSCocoaErrorDomain Code=4097 "connection to service named com.apple.privacyaccountingd" UserInfo={NSDebugDescription=connection to service named com.apple.privacyaccountingd}
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622
Nov ’24
Different information values depending on how the metadata of the image is obtained (PHAsset vs PHPickerResult)
While customizing ImagePicker and using it, we find out that the metadata is not reflected normally and report it. The situation is as follows. The time or time zone of an image is changed in the Photos app. Changing the time zone of an image with an actual capture date of 2024:11:08 08:27:44 → 2024:11:07 17:27:44 Image data is extracted from a PHAsset using PHImageManager. The metadata is obtained from this image data. The time zone information exposed in the Exif tag information does not reflect the time or time zone changed in the Photos app. let asset: PHAsset = ... .... let options = PHImageRequestOptions() options.isSynchronous = true options.version = .current options.deliveryMode = .highQualityFormat options.resizeMode = .none options.normalizedCropRect = .zero options.isNetworkAccessAllowed = true options.progressHandler = { progress, error, _, _ in } PHImageManager.default().requestImageDataAndOrientation(for: asset, options: options) { imageData, uti, orientation, info in let cgImageSource = CGImageSourceCreateWithData(imageData! as CFData, nil) let properties = CGImageSourceCopyPropertiesAtIndex(cgImageSource!, 0, nil) as? Dictionary&lt;String, Any&gt; let exif = properties!["{Exif}"] let dictionary = exif as? Dictionary&lt;String, Any&gt; } Metadata Check In this case, it is reflected in the creationDate of PHAsset, so it can be somewhat compensated by forcibly replacing the metadata. However, because PHAsset does not include time zone information, when changing the time zone as well, it's impossible to calculate the correct time according to the time zone. PHPicker This issue is resolved when using the PHPickerResult provided by PHPicker. extension PhotosPickerViewController: PHPickerViewControllerDelegate { public func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) { ..... for result in results { let identifier = UTType.image.identifier if result.itemProvider.hasItemConformingToTypeIdentifier(identifier) { result.itemProvider.loadDataRepresentation(forTypeIdentifier: identifier) { data, error in guard let data = data, let cgImageSource = CGImageSourceCreateWithData(data as CFData, nil), let properties = CGImageSourceCopyPropertiesAtIndex(cgImageSource, 0, nil) as? Dictionary&lt;String, Any&gt;, let exif = properties["{Exif}"], let dictionary = exif as? Dictionary&lt;String, Any&gt; else { return } } } } } } Metadata Check Question I wonder why this happens, and if this is normal behavior. Instead of the System Picker that Apple provides as a base, I wonder if there is any way I can supplement it in that situation if I use a customizer.
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645
Nov ’24
Is it possible to retrieve EXIF metadata from PHAsset without downloading photos (even if offloaded to iCloud Photo Library)?
iOS (Official) Photos app can display some EXIF-related metadata (e.g. camera and lens info, ISO, shutter speed, F-number) even when photos are offloaded to iCloud and the device is not connected to internet (e.g. airplane mode). However, with the Photos.framework, we need to download photos to retrive those metadata (which means it will not work with airplane mode). I tried the following methods, but none of those worked when photos were offloaded to iCloud and the device was in airplane mode: Requesting data with PHImageManager.default().requestImageDataAndOrientation Result: It does not return Data if the photo is not stored locally on the device, even with options.deliveryMode = .fastFormat Converting PHAsset#localIdentifier to an AssetsLibrary.framework URL (assets-library://asset/...) (I am aware that AssetsLibrary.framework is deprecated, but this was just a test.) Result: If PHImageManager does not returns Data, ALAsset#defaultRepresentation().metadata() returns an empty NSDictionary
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664
Nov ’24
LockedCameraCaptureExtension can not get access to photo library
I've requested the authentication in my main app. PHPhotoLibrary.requestAuthorization(for: .readWrite) { status in } Add the privacy description in both the main app and the extension. But No matter the device is locked or unlocked. When I call let fetchResult = PHAsset.fetchAssets(with: .image, options: nil) let count = fetchResult.count the count is always zero, even after a new photo is saved to the album in the same session.
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559
Oct ’24
Green Line Appears in Thumbnails in Photos but Not in Actual Photo
Hello, I’ve encountered an issue where a green line appears only in the thumbnail view of an image in the iPhone photo gallery. The green line is not present in the actual image itself. Here are some additional details: • The issue occurs only when saving the image as a JPEG. When saved as PNG, the green line does not appear. • The green line also shows up when using the PHAsset method requestImage(for:targetSize:). Depending on the targetSize, the resulting image may contain the green line. • Interestingly, this issue does not appear on iPhone Xs Max running iOS 15.2.1. However, the green line does appear on iPhone 15 Pro Max running iOS 18.0.1 when viewing the same image. I have attached the problematic image for your reference. Following images are the screen captures that shows the issue occurring on my iPhone. iPhone 15 pro max (iOS 18.0.1) iPhone Xs Max (iOS 15.2.1 ) Could this be related to a display or gallery app issue on iOS? Any advice or solutions would be greatly appreciated. Thank you!
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1.3k
Oct ’24
Inquiry Regarding File Size Differences When Migrating from ALAssetsLibrary to PHPhotoLibrary
We are currently in the process of migrating our application from using ALAssetsLibrary to PHPhotoLibrary to ensure compatibility with the latest versions of iOS. However, we have noticed a discrepancy in the file sizes of images obtained using PHPhotoLibrary compared to those obtained using ALAssetsLibrary. Specifically, we would like to understand the following points: 1.Reason for File Size Differences: What are the reasons for the difference in file sizes between images obtained using ALAssetsLibrary and those obtained using PHPhotoLibrary? Could you provide detailed information on the settings and options in PHPhotoLibrary that affect the size and quality of the images? 2.Optimal Settings: What are the optimal settings in PHPhotoLibrary to obtain images with the same quality and file size as those obtained using ALAssetsLibrary? If possible, could you provide code examples or recommended option settings?
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636
Oct ’24
What format for writeHEIFRepresentation preserves HDR?
In the WWDC 24 session "Use HDR for dynamic image experiences in your app" it's noted this is how you save edits for Adaptive HDR: SDR + HDR: writeHEIFRepresentation(of: sdrImage, to: url, colorSpace: p3Space, options: [.hdrImage: hdrImage]) SDR + Gain: writeHEIFRepresentation(of: sdrImage, to: url, colorSpace: p3Space, options: [.hdrGainMapImage: gainImage]) This won't compile because the format argument is missing. What format should be used? In the WWDC 23 session "Support HDR images in your app" RGBAf, RGBAh, and RGBA16, and RGB10 were mentioned but I'm not sure which one to use. If relevant, I'm editing photos from the user's photo library, so the image was probably taken on iPhone but perhaps not. Thanks!
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797
Oct ’24
Add to Shared Photo Library with PhotoKit
I'm using PhotoKit in macOS to add photos to the user's library. Experimenting with Shared Photo Library, it seems that these new photos always end up in the Personal Library, not the Shared Library. I'd like to get them into the Shared Photo Library somehow. Is this possible? Things I've considered: A variation/option for PHAssetChangeRequest.creationRequestForAsset: doesn't seem to exist A property of PHAsset: can't find anything A special PHAssetCollection that I could add to: again, doesn't seem to exist
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528
Oct ’24
App cannot fetch any resource after a while
Hi everyone, We came an issue that, In some scenarios in our app we cannot fetch any resources from device (Photo and Contact). One case we catched is putting app in background and spending time in other commonly used apps and coming back to our app cause this issue but there is a small chance that get this issue during using the application. In cell, we are trying to fetch the image like this imageFetchTask = Task { let image = await CompositionRoot.shared.photosManager.image(requestType: .imageCollections, forId: photoAsset.photoId) self.photoImageView.image(image) } and inner layers of this code we get the PHAsset and request image PHAsset.firstAsset(for: id) let manager = PHImageManager.default() manager.requestImage(for: asset, targetSize: request.targetSize, contentMode: .aspectFill, options: request.options) { (image, info) in continuation.resume(returning: image) } We figured out that issue not happening only in Photos also Contacts and any web request. So any help according to this situation is well appreciated. Thanks
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514
Activity
Dec ’24
Keyboard Navigation Not Working for inline PhotosPicker
We are using inline PhotosPicker introduced with iOS 17.0. The accessbility navigation using touch gestures work fine but the navigation through Keyboard doesn't work properly. The tab/arrow based Keyboard navigation can't move from native app process to inline PhotosUI process or vice versa. This is logged as a high severity bug by our accessibility team. Please look into this. Sample code for repro: https://github.com/saalisumer/AccessibilityIssueInlinePhotoPickerIOS Repro video: https://github.com/saalisumer/AccessibilityIssueInlinePhotoPickerIOS/blob/main/Simulator%20Screen%20Recording%20-%20iPhone%2015%20Pro%20-%202024-12-16%20at%2016.27.48.mp4
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531
Activity
Dec ’24
Runtime race condition warning when calling PHPhotoLibrary.shared().performChanges async
I have enabled runtime concurrency warnings to check for future problems concerning concurrency: Build Setting / Other Swift Flags: -Xfrontend -warn-concurrency -Xfrontend -enable-actor-data-race-checks When trying to call the async form of PHPhotoLibrary.shared().performChanges{} I get the following runtime warning: warning: data race detected: @MainActor function at ... was not called on the main thread in the line containing performChanges. My sample code inside a default Xcode multi platform app template is as follows: import SwiftUI import Photos @MainActor class FotoChanger{     func addFotos() async throws{         await PHPhotoLibrary.requestAuthorization(for: .addOnly)         try! await PHPhotoLibrary.shared().performChanges{             let data = NSDataAsset(name: "Swift")!.data             let creationRequest = PHAssetCreationRequest.forAsset()             creationRequest.addResource(with: .photo, data: data, options: PHAssetResourceCreationOptions())         }     } } struct ContentView: View {     var body: some View {         ProgressView()             .task{                 try! await FotoChanger().addFotos()             }     } } You would have to have a Swift data asset inside the asset catalog to run the above code, but the error can even be recreated if the data is invalid. But what am I doing wrong? I have not found a way to run perform changes, the block or whatever causes the error on the main thread. PS: This is only test code to show the problem, don't mind the forced unwraps.
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2.4k
Activity
Dec ’24
[PHCollectionList isPrivacySensitiveAlbum]: unrecognized selector crash
I cannot find anything documentation re: isPrivacySensitiveAlbum. I've granted my app access to all photos. Not sure what else to try Code that triggers the crash: let options = PHFetchOptions() options.fetchLimit = 1 let assetColl = PHAssetCollection.fetchAssetCollections(withLocalIdentifiers: [localId], options: options) if assetColl.count > 0 { if let asset = PHAsset.fetchKeyAssets(in: assetColl.firstObject!, options: options) stack trace from here on `2023-04-15 06:34:41.628537-0700 DPF[33615:6484880] -[PHCollectionList isPrivacySensitiveAlbum]: unrecognized selector sent to instance 0x7ff09232aec0 2023-04-15 06:34:41.632378-0700 DPF[33615:6484880] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[PHCollectionList isPrivacySensitiveAlbum]: unrecognized selector sent to instance 0x7ff09232aec0' *** First throw call stack: ( 0 CoreFoundation 0x00007ff80045478b __exceptionPreprocess + 242 1 libobjc.A.dylib 0x00007ff80004db73 objc_exception_throw + 48 2 CoreFoundation 0x00007ff8004638c4 +[NSObject(NSObject) instanceMethodSignatureForSelector:] + 0 3 CoreFoundation 0x00007ff800458c66 ___forwarding___ + 1443 4 CoreFoundation 0x00007ff80045ae08 _CF_forwarding_prep_0 + 120 5 Photos 0x00007ff80b8480e1 +[PHAsset fetchKeyAssetsInAssetCollection:options:] + 86 6 DPF 0x0000000100791029 $s3DPF16AlbumListFetcherV22loadKeyImageForLocalIdySo7UIImageCSgSSYaFTY0_ + 569`
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861
Activity
Dec ’24
Message from com.apple.photos.backend (PhotoKit) in log
Hello Our application is backing up the user photos to some back end. When retrieving the asset data from the Photo Library, we set the flag 'accessNetworkAllowed' to true to get the assets that might be optimized in iCloud. In the application logs, we can see the message below, and it shows as coming from com.apple.photos.backend (PhotoKit) Missing prefetched properties for PHAssetAdjustmentProperties on <PHAsset: 0x160b1ec00> BCF5688F-F7A7-4196-AFC7-A84E8BD95F3E/L0/001 mediaType=1/0, sourceType=1, (5601x3734), creationDate=2022-01-24 23:36:05 +0000, location=0, hidden=0, favorite=0, adjusted=0 . Fetching on demand on the main queue, which may degrade performance. In particular, the message says 'Fetching on demand on the main queue' but I'm not sure if that means that PhotoKit will fetch on main queue or if that mean that our application is requesting the data on main queue. Anyone could clarify? thanks
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853
Activity
Dec ’24
How to add CIFilter to AVCaptureDeferredPhotoProxy
Hello, I m trying to implement deferred photo processing in my photo capture app. After I take a photo, I pass it through a CIFilter, now with the Deferred Photo Processing where would I pass the resulting photo through the CIFilter? Since there is no way for me to know when the system has finished processing a photo. If I have to do it in my app foreground every time, how do I prevent a scenario, where the user takes a photo, heads straight to the Photos App and sees the image without the filter?
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679
Activity
Dec ’24
PHPhotoLibrary availability detection/notification
Hi, I'm having difficulties figuring out how I can reliably detect if the macOS system PHPhotoLibrary is available. If I place the system Photo Library on an external drive and then eject it, other apps on startup, such as Photos, will tell me that the library isn't available. How can I replicate this behavior? The only API I can find for this detection on startup is "PHPhotoLibrary.shared().unavailabilityReason". However this always returns nil. Another strange behavior is if I register a PHPhotoLibraryAvailabilityObserver class on startup when the library is available and then eject the drive, I do get a notification via photoLibraryDidBecomeUnavailable, but then directly after the call the app is terminated. This prevents the app to perform any kind of graceful termination. Is this the expected behavior? It would make sense that it's up to the developer to decide what happens if the library becomes unavailable. Thanks
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626
Activity
Nov ’24
PHPhoto localIdentifier to cloudIdentifier conversion
The sample code in the Apple documentation found in  PHCloudIdentifier does not compile in xCode 13.2.1. Can the interface for identifier conversion be clarified so that the answer values are more accessible/readable. The values are 'hidden' inside a Result enum It was difficult (for me) to rewrite the sample code because I made the mistake of interpreting the Result type as a tuple. Result type is really an enum. Using the Result type as the return from library.cloudIdentifierMappings(forLocalIdentifiers: ) and .localIdentifierMappings( for: ) puts the actual mapped identifiers inside the the enum where they need additional access via a .stringValue message or an evaluation of an element of the result enum. For others finding the same compile issue, here is a working version of the sample code. This compiles in xCode 13.2.1. func localId2CloudId(localIdentifiers: [String]) -> [String] {         var mappedIdentifiers = [String]()        let library = PHPhotoLibrary.shared()         let iCloudIDs = library.cloudIdentifierMappings(forLocalIdentifiers: localIdentifiers)         for aCloudID in iCloudIDs {           let cloudResult: Result = aCloudID.value             // Result is an enum .. not a tuple             switch cloudResult {                 case .success(let success):                     let newValue = success.stringValue                     mappedIdentifiers.append(newValue)                 case .failure(let failure):                     // do error notify to user                       }         }         return mappedIdentifiers     } ``` swift func func cloudId2LocalId(assetCloudIdentifiers: [PHCloudIdentifier]) -> [String] {             // patterned error handling per documentation         var localIDs = [String]()         let localIdentifiers: [PHCloudIdentifier: Result<String, Error>]  = PHPhotoLibrary.shared() .localIdentifierMappings(                   for: assetCloudIdentifiers)         for cloudIdentifier in assetCloudIdentifiers {             guard let identifierMapping = localIdentifiers[cloudIdentifier] else {                 print("Failed to find a mapping for \(cloudIdentifier).")                 continue             }             switch identifierMapping {                 case .success(let success):                     localIDs.append(success)                 case .failure(let failure) :                     let thisError = failure as? PHPhotosError                     switch thisError?.code {                         case .identifierNotFound:                             // Skip the missing or deleted assets.                             print("Failed to find the local identifier for \(cloudIdentifier). \(String(describing: thisError?.localizedDescription)))")                         case .multipleIdentifiersFound:                             // Prompt the user to resolve the cloud identifier that matched multiple assets.                             print("Found multiple local identifiers for \(cloudIdentifier). \(String(describing: thisError?.localizedDescription))") //                            if let selectedLocalIdentifier = promptUserForPotentialReplacement(with: thisError.userInfo[PHLocalIdentifiersErrorKey]) { //                                localIDs.append(selectedLocalIdentifier)                         default:                             print("Encountered an unexpected error looking up the local identifier for \(cloudIdentifier). \(String(describing: thisError?.localizedDescription))")                     }               }             }         return localIDs     }
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945
Activity
Nov ’24
How to change PHLivePhoto EXIF metadata
I have an app that allows the user to change a photo’s EXIF metadata. To do this, I request a content editing input, get the full size image, modify its properties, create a content editing output, write the output image to the rendered content URL, then call performChanges on the PHPhotoLibrary creating an asset change request for that asset setting its content editing output. This works as expected for regular photos but Live Photos get turned off converted to a regular photo. To address this, I’m doing something similar by changing the properties of the .photo image in the Live Photo. I detect when the content editing input has a Live Photo, create a Live Photo editing context, set a frame processor that returns the frame’s image after setting its properties to the updated properties when the frame type is photo, then I create the content editing output and save the Live Photo to that output. It modifies the Live Photo successfully, but the metadata is not updated. If you get the full size image again the properties are the original properties. If you look at the EXIF metadata using an app like Metapho it remains unchanged. What am I doing wrong here? Thanks! let imageURL = contentEditingInput.fullSizeImageURL! let inputImage = CIImage(contentsOf: imageURL, options: [.applyOrientationProperty: true])! var metadata: [AnyHashable: Any] = inputImage.properties // Edit the metadata as desired... let editingContext = PHLivePhotoEditingContext(livePhotoEditingInput: contentEditingInput)! editingContext.frameProcessor = { frame, error -> CIImage? in // Edit only the still photo if frame.type == .photo { return frame.image.settingProperties(metadata) } return frame.image } let contentEditingOutput = try await withCheckedThrowingContinuation { continuation in let editingOutput = PHContentEditingOutput(contentEditingInput: contentEditingInput) editingOutput.adjustmentData = adjustmentData editingContext.saveLivePhoto(to: editingOutput) { success, error in if success { continuation.resume(returning: editingOutput) } else { continuation.resume(throwing: error!) } } } try await PHPhotoLibrary.shared().performChanges { let request = PHAssetChangeRequest(for: asset) request.contentEditingOutput = contentEditingOutput }
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651
Activity
Nov ’24
How to edit gain map image to preserve HDR in Live Photo
I have an app that allows you to edit your photos. To preserve HDR, I edit both the SDR image and gain map image, like so: let sdrImage = CIImage(data: data, options: [.applyOrientationProperty: true]) let gainMapImage = CIImage(data: data, options: [.applyOrientationProperty: true, .auxiliaryHDRGainMap: true]) // edit them... try CIContext().writeHEIFRepresentation(of: sdrImage, to: url, format: .RGBA8, colorSpace: colorSpace, options: [.hdrGainMapImage: gainMapImage]) I also support editing the still photo in Live Photos. To do this you create a PHLivePhotoEditingContext, set the frameProcessor block which gives you a CIImage that I edit when the frame.type is .photo, then you create a PHContentEditingOutput and call saveLivePhoto. I’m not seeing any way to preserve HDR here. Interestingly the frame processor is called twice with .photo frame.type, but I don’t see any difference between these images. How can I edit a gain map image to preserve HDR in the still photo of a Live Photo?
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841
Activity
Nov ’24
LivePhoto not applying on iOS 17+ as live wallpaper
Hi fellow iOS developers! 👋 I've written a Swift code that converts a video (from a URL) into a Live Photo after downloading it. The conversion process seems fine, but when I try to set the generated Live Photo as a wallpaper on iOS 17+, it shows the message 'Motion not Available.' Has anyone else experienced this issue or know why this might be happening? Could it be related to changes in iOS 17 Live Photo handling or the generated file structure? Any help or suggestions would be greatly appreciated! 🙏
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589
Activity
Nov ’24
PhotosPickerItem loadTransferable Progress is always indeterminate
I tried several times to use the PhotosPickerItem loadTransferable function with the goal of receiving some progress value especially when loading large video media. However, the Progress object returned by the function has always isIndeterminate == true and so doesn't have any progress value to observe. Is there some way to make it work ? Some configuration I might have overlooked ? Or is it just not working I might have to revert back to the UIKit photo picker because of this
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718
Activity
Nov ’24
PHAssetCollectionChangeRequest.removeAssets Does Not Work
Hello! I am trying to remove a photo from my Photos Library using PhotosUI. I run into this error when I attempt to delete it: "Error returned from daemon: Error Domain=com.apple.accounts Code=7 "(null)"" No photos access scope requirements declared for changes Failed to log access with error: access= accessor:<> identifier:82068C12-FD10-4DE2-9867-B4406FBFB706 kind:intervalEvent timestampAdjustment:0 visibilityState:0 assetIdentifierCount:0 accessCount:0 tccService:kTCCServicePhotos, error=Error Domain=NSCocoaErrorDomain Code=4097 "connection to service named com.apple.privacyaccountingd" UserInfo={NSDebugDescription=connection to service named com.apple.privacyaccountingd}
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622
Activity
Nov ’24
Different information values depending on how the metadata of the image is obtained (PHAsset vs PHPickerResult)
While customizing ImagePicker and using it, we find out that the metadata is not reflected normally and report it. The situation is as follows. The time or time zone of an image is changed in the Photos app. Changing the time zone of an image with an actual capture date of 2024:11:08 08:27:44 → 2024:11:07 17:27:44 Image data is extracted from a PHAsset using PHImageManager. The metadata is obtained from this image data. The time zone information exposed in the Exif tag information does not reflect the time or time zone changed in the Photos app. let asset: PHAsset = ... .... let options = PHImageRequestOptions() options.isSynchronous = true options.version = .current options.deliveryMode = .highQualityFormat options.resizeMode = .none options.normalizedCropRect = .zero options.isNetworkAccessAllowed = true options.progressHandler = { progress, error, _, _ in } PHImageManager.default().requestImageDataAndOrientation(for: asset, options: options) { imageData, uti, orientation, info in let cgImageSource = CGImageSourceCreateWithData(imageData! as CFData, nil) let properties = CGImageSourceCopyPropertiesAtIndex(cgImageSource!, 0, nil) as? Dictionary&lt;String, Any&gt; let exif = properties!["{Exif}"] let dictionary = exif as? Dictionary&lt;String, Any&gt; } Metadata Check In this case, it is reflected in the creationDate of PHAsset, so it can be somewhat compensated by forcibly replacing the metadata. However, because PHAsset does not include time zone information, when changing the time zone as well, it's impossible to calculate the correct time according to the time zone. PHPicker This issue is resolved when using the PHPickerResult provided by PHPicker. extension PhotosPickerViewController: PHPickerViewControllerDelegate { public func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) { ..... for result in results { let identifier = UTType.image.identifier if result.itemProvider.hasItemConformingToTypeIdentifier(identifier) { result.itemProvider.loadDataRepresentation(forTypeIdentifier: identifier) { data, error in guard let data = data, let cgImageSource = CGImageSourceCreateWithData(data as CFData, nil), let properties = CGImageSourceCopyPropertiesAtIndex(cgImageSource, 0, nil) as? Dictionary&lt;String, Any&gt;, let exif = properties["{Exif}"], let dictionary = exif as? Dictionary&lt;String, Any&gt; else { return } } } } } } Metadata Check Question I wonder why this happens, and if this is normal behavior. Instead of the System Picker that Apple provides as a base, I wonder if there is any way I can supplement it in that situation if I use a customizer.
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645
Activity
Nov ’24
Is it possible to retrieve EXIF metadata from PHAsset without downloading photos (even if offloaded to iCloud Photo Library)?
iOS (Official) Photos app can display some EXIF-related metadata (e.g. camera and lens info, ISO, shutter speed, F-number) even when photos are offloaded to iCloud and the device is not connected to internet (e.g. airplane mode). However, with the Photos.framework, we need to download photos to retrive those metadata (which means it will not work with airplane mode). I tried the following methods, but none of those worked when photos were offloaded to iCloud and the device was in airplane mode: Requesting data with PHImageManager.default().requestImageDataAndOrientation Result: It does not return Data if the photo is not stored locally on the device, even with options.deliveryMode = .fastFormat Converting PHAsset#localIdentifier to an AssetsLibrary.framework URL (assets-library://asset/...) (I am aware that AssetsLibrary.framework is deprecated, but this was just a test.) Result: If PHImageManager does not returns Data, ALAsset#defaultRepresentation().metadata() returns an empty NSDictionary
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664
Activity
Nov ’24
LockedCameraCaptureExtension can not get access to photo library
I've requested the authentication in my main app. PHPhotoLibrary.requestAuthorization(for: .readWrite) { status in } Add the privacy description in both the main app and the extension. But No matter the device is locked or unlocked. When I call let fetchResult = PHAsset.fetchAssets(with: .image, options: nil) let count = fetchResult.count the count is always zero, even after a new photo is saved to the album in the same session.
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559
Activity
Oct ’24
Green Line Appears in Thumbnails in Photos but Not in Actual Photo
Hello, I’ve encountered an issue where a green line appears only in the thumbnail view of an image in the iPhone photo gallery. The green line is not present in the actual image itself. Here are some additional details: • The issue occurs only when saving the image as a JPEG. When saved as PNG, the green line does not appear. • The green line also shows up when using the PHAsset method requestImage(for:targetSize:). Depending on the targetSize, the resulting image may contain the green line. • Interestingly, this issue does not appear on iPhone Xs Max running iOS 15.2.1. However, the green line does appear on iPhone 15 Pro Max running iOS 18.0.1 when viewing the same image. I have attached the problematic image for your reference. Following images are the screen captures that shows the issue occurring on my iPhone. iPhone 15 pro max (iOS 18.0.1) iPhone Xs Max (iOS 15.2.1 ) Could this be related to a display or gallery app issue on iOS? Any advice or solutions would be greatly appreciated. Thank you!
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1.3k
Activity
Oct ’24
Inquiry Regarding File Size Differences When Migrating from ALAssetsLibrary to PHPhotoLibrary
We are currently in the process of migrating our application from using ALAssetsLibrary to PHPhotoLibrary to ensure compatibility with the latest versions of iOS. However, we have noticed a discrepancy in the file sizes of images obtained using PHPhotoLibrary compared to those obtained using ALAssetsLibrary. Specifically, we would like to understand the following points: 1.Reason for File Size Differences: What are the reasons for the difference in file sizes between images obtained using ALAssetsLibrary and those obtained using PHPhotoLibrary? Could you provide detailed information on the settings and options in PHPhotoLibrary that affect the size and quality of the images? 2.Optimal Settings: What are the optimal settings in PHPhotoLibrary to obtain images with the same quality and file size as those obtained using ALAssetsLibrary? If possible, could you provide code examples or recommended option settings?
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636
Activity
Oct ’24
What format for writeHEIFRepresentation preserves HDR?
In the WWDC 24 session "Use HDR for dynamic image experiences in your app" it's noted this is how you save edits for Adaptive HDR: SDR + HDR: writeHEIFRepresentation(of: sdrImage, to: url, colorSpace: p3Space, options: [.hdrImage: hdrImage]) SDR + Gain: writeHEIFRepresentation(of: sdrImage, to: url, colorSpace: p3Space, options: [.hdrGainMapImage: gainImage]) This won't compile because the format argument is missing. What format should be used? In the WWDC 23 session "Support HDR images in your app" RGBAf, RGBAh, and RGBA16, and RGB10 were mentioned but I'm not sure which one to use. If relevant, I'm editing photos from the user's photo library, so the image was probably taken on iPhone but perhaps not. Thanks!
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797
Activity
Oct ’24
Add to Shared Photo Library with PhotoKit
I'm using PhotoKit in macOS to add photos to the user's library. Experimenting with Shared Photo Library, it seems that these new photos always end up in the Personal Library, not the Shared Library. I'd like to get them into the Shared Photo Library somehow. Is this possible? Things I've considered: A variation/option for PHAssetChangeRequest.creationRequestForAsset: doesn't seem to exist A property of PHAsset: can't find anything A special PHAssetCollection that I could add to: again, doesn't seem to exist
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528
Activity
Oct ’24