Discuss Spatial Computing on Apple Platforms.

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Misaligned visionOS Simulator Home Position
Using Xcode v26 Beta 6 on macOS v26 Beta 25a5349a When pressing on the home button of the visionOS simulator, I am not positioned in the middle of the room like would normally be. This occurred when moving a lot in the space to find an element added to an ImmersiveSpace. How to resolve: restart simulator device. See attached the pictures of the visionOSSimulatorCorrectHomePosition and the visionOSSimulatorMisallignedHomePosition.
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880
Sep ’25
Accessing pupil diameter in visionOS
Previously I had developed software using SMI eye trackers, both screen mounted and their mobile glasses, for unique therapeutic and physiology applications. Sadly, after SMI was bought by Apple, their hardware and software have been taken off the market and now it is very difficult to get secondhand-market systems. The Apple Vision Pro integrates the SMI hardware. While I can use ARKit to get gaze position, I do not see a way to access information that was previously made accessible on the SMI hardware, particularly: dwell time and pupil diameter information. I am hopeful (or asking) to see that if a user has a properly set up Optic ID and would opt-in if, either on the present or a future version of visionOS, it might be possible to get access to the data streams for dwell times and pupil diameter. Pupil diameter is particularly important as it is a very good physiological measure of how much stress a person is encountering, which is critical to some of the therapeutic applications that formerly we used SMI hardware. Any ideas, or, if this is not possible, proposing this to the visionOS team would be appreciated!
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Jul ’25
What's the relation of SwiftUI frames' sizes and RealityKit Entities sizes
Currently I want to recreate a window which is similar to system window in ImmersiveSpace. But we only can use the meter unit in RealityKit. I create a plane entity, I don't know how to set the size using meter unit to make the plane's size totally consistent with the system window. Also, I want to know the z and y position of the system window in the immersive space.
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Jan ’25
Realitykit asset loading
With Xcode 26, loading ressources with RealityKit is extremely slow. Here my project takes almost 50 seconds to load. I also get multiple Hang detected messages in the console: When I uncheck "Debug executable" in the schema, the same project loads in 2 seconds. I'm using RealityKit asynchronous loading: private static func loadFromRealityComposerPro( named entityName: String, fromSceneNamed sceneName: String ) async -> Entity? { var entity: Entity? do { let scene = try await Entity( named: sceneName, in: visionPetsContentBundle ) entity = scene.findEntity(named: entityName) } catch { print( "Error loading \(entityName) from scene \(sceneName): \(error.localizedDescription)" ) } return entity } Anyone having the same problem?
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Jun ’25
RealityView Gestures for iOS
I started a new project using RealityKit and RealityView, intended as an AR app on iPhone and iPad, but eventually VisionOS as well. I'm challenged because I find much of the recent documentations, WWDC videos, etc, include features that are VisionOS only. Right now, I would simply like to create some gesture functionality that is similar to AR Quick Look defaults, meaning drag to reposition, two fingers to rotate or zoom. In the past, this would be implemented with something like: arView.installGestures([.all], for: entity) however, with RealityView I don't know how (or if possible) to access an ARView. In RealityKit, I have found this doc: https://developer.apple.com/documentation/realitykit/transforming-realitykit-entities-with-gestures However, many of the features in that posting are VisionOS only, and I've found no good documentation on the topic that is specific or at least compatible with iOS. I know reverting to an ARView is an option, but I want to use RealityView if at all possible as I see it as more forward-looking.
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388
Jan ’25
How to search location in global rather than in local?
I'm doing a weather app, users can search locations for getting weather, but the problem is, the results only shows locations in my country, not in global. For example, I'm in China, I can't search New York, it just shows nothing. Here's my code: @Observable class SearchPlaceManager: NSObject { var searchText: String = "" let searchCompleter = MKLocalSearchCompleter() var searchResults: [MKLocalSearchCompletion] = [] override init() { super.init() searchCompleter.resultTypes = .address searchCompleter.delegate = self } @MainActor func seachLocation() { if !searchText.isEmpty { searchCompleter.queryFragment = searchText } } } extension SearchPlaceManager: MKLocalSearchCompleterDelegate { func completerDidUpdateResults(_ completer: MKLocalSearchCompleter) { withAnimation { self.searchResults = completer.results } } } Also, I've tried to set searchCompleter.region = MKCoordinateRegion( center: CLLocationCoordinate2D(latitude: 0, longitude: 0), span: MKCoordinateSpan(latitudeDelta: 180, longitudeDelta: 360) ), but it doesn't work.
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787
Dec ’24
How to show only Spatial video using UIDocumentPickerViewController
Is there a suitable UTType type to satisfy the need to pick up only SpatialVideo in UIDocumentPickerViewController? I already know that PHPickerFilter in PHPickerViewController can do this, but not in UIDocumentPickerViewController. Our app needs to adapt both of these ways to pick spatial videos So is there anything that I can try in UIDocumentPickerViewController to fulfill such picker functionality?
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469
Feb ’25
Volumetric Windwos anchores
Hi, we would like to create something where you can open multiple volumetric windows and place them in a room, our biggest issue is that we want these windows to be persistent, so when I close and reopen the app, the windows to be in the same position. We can't use immersive spaces because we also want to have the possibility to access the shared space. Is it possible with the current features and capabilities to do that? If yes do you have some advices how can we achieve this? The alternative is if is it possible to open the virtual display in immersive spaces or if we have the possibility to implement our own virtual display.
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Feb ’25
Automatically Enabling Spatial Personas in App
Is it possible to create a button in my app that will turn on the spatial personas for the user? Currently the only way I know of turning on spatial personas is by selecting the cube icon in the FaceTime window which is quite clunky for people unfamiliar with the Vision Pro's UI. Any help would be appreciated.
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411
Feb ’25
Vision OS: HUD mode windows
If I correctly understand, a new Enterprise API has been introduced In visionOS 26 allowing to fix windows to the user frame of reference, implementing a something like an "head up display", with the window tracking the user movements. Is this API only available to enterprise applications, and if so is there a plan to make it available for every kind of app?
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107
Jun ’25
Cast virtual light on real-world environments in VisionOS/RealityKit?
Hi everyone, I've been exploring an idea that involves using virtual light sources in VisionOS/RealityKit to interact with real-world objects. Specifically, I'd like to simulate a scenario where a virtual spotlight or other light source casts light or shadows onto real-world environments, creating the effect of virtual lighting interacting with physical surroundings. Is this currently feasible within VisionOS/RealityKit? Thank you!
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Jan ’25
RealityKit Trace Metric Max/Range for VisionOS app
Hi Nathaniel, I spoke with you yesterday in the WWDC lab. Thanks for chatting with me! Is it possible to get a link to a doc that has some key metrics I'd find in a RealityKit trace so I know if that metric is exceeding limits and probably causing a problem? Right now, I just see numbers and have no idea if a metric is high or low :). This is specifically for a VisionOS app. Thanks, Bob
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Jun ’25