apple pencil battery life

Hello! I'm following the Foundation Models adapter training guide (https://developer.apple.com/apple-intelligence/foundation-models-adapter/) on my NVIDIA DGX Spark box. I'm able to train on my own data but the example notebook fails when I try to export the artifact as an fmadapter. I get the following error for the code block I'm trying to run. I haven't touched any of the code in the export folder. I tried exporting it on my Mac too and got the same error as well (given below). Would appreciate some more clarity around this. Thank you. Code Block: from export.export_fmadapter import Metadata, export_fmadapter metadata = Metadata( author=3P developer, description=An adapter that writes play scripts., ) export_fmadapter( output_dir=./, adapter_name=myPlaywritingAdapter, metadata=metadata, checkpoint=adapter-final.pt, draft_checkpoint=draft-model-final.pt, ) Error: --------------------------------------------------------------------------- ModuleNotFoundError Traceback (most recent call last) Cell In

Hello Apple Developer Forum, I got the following statement from the AI model. It seems it is also reflecting my real-world experience. Where do I find an official source that fully describes the array on swiftData model behaviour? When a SwiftData model contains an array of value types, such as [String] or [Int], the array's order is preserved

Current HealthKit APIs provide access to heart-rate data through queries, but not as a true real-time stream. This limitation prevents systems such as Mercedes-Benz ENERGIZING from dynamically adapting the vehicle environment — including light, sound, seat massage and climate — to the driver’s physiological state. The ENERGIZING Coach developed by Mercedes-Benz uses continuous biometric feedback to enhance comfort, focus and safety by adjusting sensory stimuli based on live pulse data. Garmin wearables can already support this because they offer open Bluetooth Low Energy protocols. The Apple Watch, on the other hand, stores heart-rate data securely in HealthKit and makes it available through delayed write intervals. As a result, the current query mechanisms such as HKAnchoredObjectQuery or HKObserverQuery deliver updates with a latency of several seconds to minutes, which is too slow for the type of sub-second reaction required by driver-assistance or wellness systems. I would like to propose that Apple

I'm trying to make a watchOS app that uses sleep data to wake users up when they enter lighter sleep stages. Apple has HealthKit, which exposes HKCategoryValueSleepAnalysis to view each stage throughout sleep, but unfortunately, this data is only written after the user wakes up. I did some research and found that the Apple Watch’s sleep classifier is part of Apple’s private system process, and apps can’t access that model directly or as it’s running. So, there’s no way to “record” my own data stream and match it with Apple’s classification during the night. Has anyone found a way to approximate or access live sleep-stage data in another way? I’m thinking of combining CoreMotion (for movement) and heart rate data from a HKWorkoutSession to infer stages myself, but I’m wondering if there’s any Apple-approved or more accurate approach for this. In other words, is there any way to use an Apple Watch to detect sleep stages accurately while the user is still asl

I'm working on moving XCTests to Swift Testing and trying to understand why it shows Testing Library Version: 102 (arm64-apple-ios13.0-simulator) when running. Why iOS 13?

Hello All, I am looking for assistance with our FairPlay Streaming (FPS) certificates. We are in the process of migrating to a new video streaming vendor and need to create a new FPS certificate using SDK 4. However, we have reached the limit of allowed FPS certificates in our account and cannot create a new one. Issue Details: • We currently have two FPS certificates active in our developer account. • One of these was created using SDK 5, but our new vendor (Mux) requires an FPS certificate based on SDK 4. • Since Apple does not allow deleting FPS certificates from the developer portal, we are unable to create a new SDK 4 certificate. • We kindly request Apple to revoke one of our existing FPS certificates to allow us to generate a new SDK 4 certificate. Request: We would greatly appreciate it if you could assist us on how to delete one of our existing FPS certificates so that we can proceed with creating a new SDK 4 certificate for our vendor integration. Thank you for your support.

For testing, I'm trying to manually send a push notification to my app using Apple's tool at https://icloud.developer.apple.com/dashboard/notifications/ ... , and I can't figure out where to get the required device token without writing a program to do so. Is there somewhere in Xcode or on https://developer.apple.com where I can copy it from? I already have the .p8 file with APNs enabled, and have set the remote notifications capability for the app in Xcode. I must be missing something obvious. I've read a bunch of search results and all they cover is how to get the token programmatically. The device token must be available somewhere, right?

We rely on ApplePaySession.applePayCapabilities() to decide whether to show the Apple Pay button. We use two different merchant IDs for non-prod/prod environments, and encountered a change in behavior where this API now returns different results. These merchant IDs are generated from a third-party provider Adyen. However, Adyen has informed us that they are unable to identify the root cause of the issue and advised us to seek assistance directly from Apple Pay support. Timeline Last known working date: 13/08/2025 Issue first noticed: 18/08/2025 Environment Details Apple Pay JS API version 1.latest Browsers Tested: Third party browsers including Chrome/139.0.0.0, Firefox/141.0 Browsers with ApplePaySession built-in (like iOS Chrome, iOS Safari, and macOS Safari) are working fine Framework Stack: Angular v18.1.3 (important) no configuration setup in Apple dev account, merchantId is generated from a third-party provider Adyen. Current Execution Flow: Apple Pay JS API

I use ARKit for motion tracking. I get the skeleton joint coordinates and use them for animation. I didn't make any changes to the code, but I updated the iOS version from 18 to 26, and modelTransform now always returns nil. https://developer.apple.com/documentation/arkit/arskeleton3d/modeltransform(for:) For example bodyAnchor.skeleton.modelTransform(for: .init(rawValue: head_joint)) bodyAnchor is ARBodyAnchor. I see the default skeleton on the screen, but now I can't get the coordinates out of it. I'm using an example from Apple's WWDC presentation. https://developer.apple.com/documentation/arkit/capturing-body-motion-in-3d Are there any changes in the API? Or just bug?