Photos & Camera

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Explore technical aspects of capturing high-quality photos and videos, including exposure control, focus modes, and RAW capture options.

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LockedCameraCaptureManager
Task { for await update in LockedCameraCaptureManager.shared.sessionContentUpdates { switch update { case .initial(let urls): print("frank: init \(urls)") await MainActor.run { let label = UILabel(frame: CGRect(x: 100, y: 100, width: 100, height: 30)) label.text = "frank test" label.textColor = .black UIViewController.getTop().view.addSubview(label) } case .added(let url): print("frank: add \(url)") case .removed(let url): print("frank: removed \(url)") default: break } } } why 'case .initial(let urls)': never never be executed? Can some one provide a sample code?
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414
Oct ’24
Swift fails to fetch Photo Albums Synced using Windows iTunes from External Drive
See Configuration Details at the end of this message. Despite numerous attempts, I have been unable to determine the correct syntax to fetch photo albums from my iPad Pro 13.0 using Xcode and Swift. All the photo album were synced to the iPad Pro 13-inch using the latest versions of Apple iTunes for Windows from an external Western Digital G-Drive hard drive (No iCloud). All synced albums appear under "From My Mac" on the iPad. I only want to access each album's photo and video count. See sample code snippet below. I have tried multiple subtype options and album types without success. Zero albums are always returned despite having around 3900 albums in the iPad Pro 13.0 photo library. Authorization to the photo library does not appear to be the problem. PHPhotoLibrary.requestAuthorization { status in if status == .authorized { let result = PHAssetCollection.fetchAssetCollections(with: .album, subtype: .any, options: nil) if result.count == 0 { print("No albums found.") return } } } Any help or suggestions would greatly be appreciated. ApplePhoto Configuration Details iPad Pro 13-inch (M4) (iPad16,6) iPadOS = 17.7 iCloud = Turned Off iPad Pro Photo Library Albums = 3900 iPad Pro Photo Library Photos = 118000 iPad Pro Photo Library Videos = 4800 MacOS = Sonoma 14.6.1 XCode Version = 16.0 Swift Version = 5.0 (Xcode Default) Microsoft Windows 10 Pro Version = 22H2 Apple iTunes for Windows = 12.13.4.4
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298
Oct ’24
PHPickerResult take loong time to load large video
On some devices, loadFileRepresentation(forTypeIdentifier: completionHandler) take a loong time(about two minute) to callback result for some large video(about 200 MB, take by device camera). environment: Model: iPhone 12 Model Number: MGGM3CH/A iOS Version: 18.3.2 PHPickerResult.NSItemProvider.loadFileRepresentation() // import PhotosUI func picker(_ picker: PHPickerViewController, didFinishPicking results: [PHPickerResult]) { picker.dismiss(animated: true, completion: nil) guard let provider = results.last?.itemProvider else { return } guard provider.hasItemConformingToTypeIdentifier(UTType.movie.identifier) else { return } Task { provider.loadFileRepresentation(forTypeIdentifier: UTType.movie.identifier) { url, error in guard let url = url else { return } // Do some stuff... } } } ps: I also try some other function, eg: provide.loadItem(forTypeIdentifier:), but not work too.
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61
Mar ’25
Improving the transition between ultra wide and wide angle lens
I'm building an app which uses the camera and want to take advantage of the ability of the builtInTripleCamera and builtInDualWideCamera to automatically switch between the ultra wide and wide angle lens to focus on close up shots. It's working fine - except that the transition between the two lenses is a bit jumpy. I looked at what the native Camera app does and it seems to apply a small amount of blurring when the transition happens to help "mask" the jumpiness. How can I replicate this, or is there another way to improve the UX of switching between one lens and another automatically?
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457
Feb ’25
LockedCameraCaptureManager sessionContentUpdates sometimes is not called
Within my app, I have: for try await update in LockedCameraCaptureManager.shared.sessionContentUpdates { It seems that the first time my app opens from LockedCameraCapture (after enabling camera permissions etc...) this update is never called and the user will not see their capture (.added or .initial) If I then try to take another picture/video through my LockedCameraCapture control, it takes the video, opens the app as before, but this time sessionContentUpdates is called twice, once for the first video and once for the second video! After that it doesn't seem to occur again and all works perfectly! My device is: iPhone 16 Pro Max, iOS 18.2 developer beta Has anyone experienced this?
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359
Nov ’24
Attaching depth map manually
Hi, I have a problem when I want to attach my grayscale depth map image into the real image. The produced depth map doesn't have the cameraCalibration value which should responsible to align the depth data to the image. How do I align the depth map? I saw an article about it but it is not really detailed so I might be missing some process. I tried to: convert my depth map into pixel buffer create image destination ref and add the image there. add the auxData (depth map dict) This is the output: There is some black space there and my RGB image colour changes
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369
Mar ’25
Files and Folders permission of App keeps denied, even from Settings.
Hi Apple Engineer, My app is using ImageCaptureCore framework to communicate to external DSLR Camera. When I connect my device to a camera, I execute the requestContentsAuthorization(completion:) to request for Access Files on Connected Cameras. This is the dialog when the request is executed: When I tap "OK", the status of content authorization keeps "Denied". even when I open "Files and Folders" permission in "Privacy & Security" Settings. When I switched ON the permission, the switch keeps back to turned off. You could see the reproduce in this GoogleDrive video https://drive.google.com/file/d/15B-R5TONgMWg8qFiYUGK0hTy62dsVGUX/view?usp=sharing The occurrence keeps happen even: I uninstall and install the app back Do "Reset Location & Privacy" Do "Reset All Settings" I attached the sysdiagnose files in this GoogleDrive file https://drive.google.com/file/d/11lovl_xC95AKXQTkZ1_e6UbEgS5md0Z3/view?usp=sharing I firstly experience this issue after researching ImageCaptureCore's API. I executed resetContentsAuthorizationWithCompletion:. After that, my permission request keeps denied as described above :( There are other developer that experiences the same as mine https://forums.developer.apple.com/forums/thread/756960 . There is a simple sample project there and it's reproducible in my case. Could you help me how to accomplished my app can be granted for permission to "Files and Folders" permission when using ImageCaptureCore? Could it be a bug from the system?
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466
Oct ’24
Blurry Depth Data since iPhone 13
I tested the accuracy of the depth map on iPhone 12, 13, 14, 15, and 16, and found that the variance of the depth map after iPhone 12 is significantly greater than that of iPhone 12. Enabling depth filtering will cause the depth data to be affected by the previous frame, adding more unnecessary noise, especially when the phone is moving. This is not friendly for high-precision reconstruction. I tried to add depth map smoothing in post-processing to solve the problem of large depth map deviation, but the performance is still poor. Is there any depth map smoothing solutions already announced by Apple?
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36
2w
PHFetchOptions.includeHiddenAssets does not correctly return asset by id
When attempting to access a PHAsset that is in the hidden folder of iOS26, the PHFetchResult always returns no items, even when the user has granted full access to photos and even when includeHiddenAssets is true. This is the code suggested by ChatGPT; it always fails: public func fetchAsset(withLocalIdentifier identifier: String) -> PSSPHAssetImplementing? { // First try the direct fetch by identifier (fast path) let directResult = PHAsset.fetchAssets(withLocalIdentifiers: [identifier], options: nil) if let asset = directResult.firstObject { return build(from: asset) } // Fallback: fetch all assets including hidden, then filter manually let options = PHFetchOptions() options.includeHiddenAssets = true let allAssets = PHAsset.fetchAssets(with: options) for index in 0..<allAssets.count { let asset = allAssets.object(at: index) if asset.localIdentifier == identifier { return build(from: asset) } } return nil } Is it no longer possible to retrieve a hidden photo in iOS 26?
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249
1w
Photo permission dialog not shown when iOS app runs on Mac
According to the docs: The first time your app performs an operation that requires [photo library] authorization, the system automatically and asynchronously prompts the user for it. (https://developer.apple.com/documentation/photokit/delivering-an-enhanced-privacy-experience-in-your-photos-app) I.e. it's not necessary for the app to call PHPhotoLibrary.requestAuthorization. This does seem to be what happens when my app runs on an iPhone or iPad; the prompt is shown. But when it runs on a Mac in "designed for iPad" mode, the permission dialog is not presented. Instead the code continues to see status == .notDetermined. That's today, on macOS 15.3. It may have worked in the past. Is anyone else seeing issues with this? Should I call requestAuthorization explicitly? (Would that actually work?)
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404
Mar ’25
Unkown photos were added to my iPhone Photo App.
There are several unknown pictures were added to my iPhone Photos. I'm developing a iOS app in swiftUI. And I'm sure that neither my developing app asked a permission to save photos to iOS device, nor these pictures are taken by myself, downloaded from the web, or synced from my iCloud. Why does this happen? Is my account or my iPhone attacked or hacked? btw, my device has turned the debug mode on, will this setting option would leads some vulnerability or some debug tools would add photos to my albums? The attached pictures are the unknown photos in my Photos App. I'v search this photo with google. And I found that many developers in stack overflow use this picture when they encounter troubles with image display or other manipulation. Where where are this photo come from? Why does it exist in my Photo albums?
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431
Feb ’25
Impact on iOS Due to Image Policy Changes with Android Target SDK 34
As the image access policy has changed with Android targeting SDK 34, I’m planning to update the way our app accesses photos. We are using the react-native-image-picker library to access images. On Android, the system no longer prompts the user for image access permissions, but on iOS, permission requests still appear. Since Android no longer requires explicit permissions, I’ve removed the permission request logic for Android. In this case, is it also safe to remove the permission request for iOS? In our app, photo access is only used for changing the user profile picture and attaching images when writing a post on the bulletin board. Are there any limitations or considerations for this kind of usage?
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77
Apr ’25
Need the information of minimum focus distance of different cameras in each iPhone model
Our app involves using the camera to scan barcodes or QR codes, with a working distance of about 5 cm. However, we’ve noticed variations in the focus distance of camera lenses across different iPhone models. Currently, we mainly use two types of lenses: wide-angle and ultra-wide-angle. • For iPhone 13 and earlier models, we use the wide-angle lens. • For iPhone 13 Pro and later models, we use the ultra-wide-angle lens. We are not certain if this setup is correct since we don’t have all iPhone models to test.
There is a users have reported focus issues on his iPhone 15. We would like to ask if there’s a resource where we can find the minimum focus distance of different cameras in each iPhone model. This is to verify whether our current configuration is accurate. Alternatively, if such data is not readily available, could apple tam advise which camera should be used on various iPhone models for scenarios with a working distance of approximately 5 cm? Thank you!
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410
Nov ’24
3D scanning and 3D model with texture mapping
I am new here and would appreciate help in coding or an explanation what to use in swift for an app which will be able to capture LiDAR scanning and RGB data from taken pictures, generate a 3D mesh, and create .OBJ, .MTL, and .JPEG file set for further manipulation of 3D model. I am able to create from LiDAR scanning 3D mesh and .OBJ file but can not generate .MTL and .JPEG for a texture of 3D model.
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358
Feb ’25
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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675
Oct ’24
PHLivePhotoEditingContext.saveLivePhoto results in AVFoundation error -11800 "The operation could not be completed" reason An unknown error occurred (-12815)
When trying to edit some Live Photos, calling PHLivePhotoEditingContext.saveLivePhoto results in the following error: Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not be completed" UserInfo={NSLocalizedFailureReason=An unknown error occurred (-12815), NSLocalizedDescription=The operation could not be completed, NSUnderlyingError=0x300d05380 {Error Domain=NSOSStatusErrorDomain Code=-12815 "(null)"}} I was able to replicate it on my device by taking a new Live Photo. Not sure what's wrong with that one specifically, not all Live Photos replicate the issue. I've submitted FB15880825 with a sysdiagnose and a Photos Diagnostics as well. Any ideas what's going on here? It's impacting multiple customers. Thanks!
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549
Jun ’25
PHPickerViewController update preselectedAssetIdentifiers
I am trying to recreate the iOS Messages app photo selection UI, where a PHPickerViewController is displayed half screen, with the message text field and a scrolling photo viewer on top. I have that UI mostly working, but cannot figure out how to allow a user to remove an image from my scrolling photo viewer (just like in the iOS Messages app). When the picker is initially displayed, I can show selected images using the preselectedAssetIdentifiers. However, if the user taps the "x" to remove an image from the scrolling photo viewer, there is no way that I have found to update that selection in the picker. I can dismiss/show a new picker with the animated property set to false, but that creates a very apparent bounce in the screen. Are there any ways I am missing to accomplish this? Here is what I have so far:
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369
Feb ’25