I want to let users place 2D/3D “artworks” on detected walls and have them reappear in exactly the same real‑world spot after quitting and relaunching the app (like widgets do, but for my own entities).Environment: Xcode 26, visionOS 2.0, RealityKit + ARKitSession/WorldTrackingProvider Entities are parented to a holder that’s aligned to a wall via plane/mesh raycasts.
What I’ve tried:
Create a WorldAnchor at placement, save UUID + full 4×4 transform On next launch, re-create the WorldAnchor (or set the saved transform) and attach the entity Gate restore on relocalization/mesh updates and disable all raycast/search after restore Issue: After relaunch, placement still resolves relative to current device pose, not the same wall position.
Questions:
Is there a public API in visionOS 2.0 to persist app‑managed world anchors across sessions (room‑fixed), e.g., AnchorStore or equivalent?
If not, what’s the recommended pattern to reliably restore wall‑anchored content?
Are persistence features mentioned for widgets/windows available to third‑party RealityKit entities?
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Hi, I have a small question. Is it possible to place the entities from a reality view (Immersive space) at the eye level on Y axis? Is it enough to set the position to (x, 0 , z)?
Hello, I tried to build something with scene reconstruction but I want to add occlusion on the Surfaces how can I do that? I tried to create an entity and than apply an Occlusion Material but I received an ShapeResourece and I should pass an MeshResource to create a mesh for the entity and than apply a material. Any suggestions?
Hi, I would like to put a video in an ImmersiveSpace but, when people tap on maximize button from top left corner, the app crashes. Is it a way to remove that button?
I need it to be in an ImmersiveSpace because I would like to be able to instantiate it wherever I want.
Hi, I've created an carousel using an Tabview component and it is divided in pages, each page has 7 items. Now we wan't to load the carousel page by page, but whenever I updated the list which Tabview uses to render, it flickers because it rerenders previous elements.
I've tried to use a scroll view for this but this app is for Vision Pro and I added some 3D transformations (position/rotation) to the cards from the tabview and when I added this in the scrollview they becom unclickable.
Do you have any sugestions what can I do?
Bellow is a sample of the code, I put [items] just to suggest there is a list.
VStack (spacing: 45) {
TabView(selection: $navigationModel.carouselSelectedPage) {
let orderedArtist = [items]
let numberOfPages = Int((Double(orderedArtist.count) / Double(cardsPerPage)).rounded(.up))
if(numberOfPages != 1){
Spacer().tag(-1)
}
ForEach(0..<numberOfPages, id: \.self) { page in
LazyHStack(alignment: .top, spacing: 16){
ForEach(0..<cardsPerPage, id: \.self) { index in
if(page * cardsPerPage + index < orderedArtist.count){
let item = orderedArtist[page * cardsPerPage + index]
GeometryReader{proxy in
Bellow I created Manager to be easier for me to handle app limits, but for some reason It never reached callbacks function, I have permission for screen time, I added the capabilities for it also, I'm sure, I send correctly the appTokens, categoriesTokens ... and the time limit and it also reach ✅ Monitoring started for..., I don't know what to do anymore:
import SwiftUI
import DeviceActivity
import FamilyControls
import ManagedSettings
@MainActor
class AppUsageManager: DeviceActivityMonitor, ObservableObject {
static let shared = AppUsageManager()
private let deviceActivityCenter = DeviceActivityCenter()
private var monitoringSelections: [DeviceActivityName: (selection: FamilyActivitySelection, timeLimit: DateComponents)] = [:]
private var resetTimer: Timer?
private override init() {
super.init()
print("🟢 AppUsageManager initialized.")
}
// MARK: - Public Methods
/// Configures monitoring for a selection with a specific event name and time limit.
func configureMonitoring(
for selection: FamilyActivitySelection,
timeLimitInMinutes: Int,
activityName: String,
eventName: String
) {
let activityName = DeviceActivityName(activityName)
let eventName = DeviceActivityEvent.Name(eventName)
monitoringSelections[activityName] = (selection, DateComponents(minute: timeLimitInMinutes))
setupMonitoring(for: activityName, with: eventName)
}
/// Stops monitoring for a specific event.
func stopMonitoring(for activityName: String) {
let activityName = DeviceActivityName(activityName)
Task {
print("🛑 Stopping monitoring for \(activityName.rawValue).")
deviceActivityCenter.stopMonitoring([activityName])
monitoringSelections.removeValue(forKey: activityName)
}
}
/// Stops all monitoring.
func stopAllMonitoring() {
print("🛑 Stopping monitoring")
deviceActivityCenter.stopMonitoring()
}
// MARK: - Private Methods
/// Sets up monitoring for a specific event.
private func setupMonitoring(
for activityName: DeviceActivityName,
with eventName: DeviceActivityEvent.Name
) {
stopAllMonitoring()
guard let (selection, timeLimit) = monitoringSelections[activityName] else {
print("⚠️ No selection configured for \(activityName.rawValue).")
return
}
print("🛠 Setting up monitoring for \(activityName.rawValue).")
print("📋 Monitoring Details:")
print("- Time Limit: \(timeLimit.minute ?? 0) minutes.")
let warningThreshold = DateComponents(minute: 3)
let timeZone = TimeZone.current
let schedule = DeviceActivitySchedule(
intervalStart: DateComponents(timeZone: timeZone, hour: 0, minute: 0, second: 0),
intervalEnd: DateComponents(timeZone: timeZone, hour: 23, minute: 59, second: 59),
repeats: true,
warningTime: warningThreshold
)
let events: [DeviceActivityEvent.Name: DeviceActivityEvent] = [
eventName: DeviceActivityEvent(
applications: selection.applicationTokens,
categories: selection.categoryTokens,
webDomains: selection.webDomainTokens,
threshold: timeLimit
)
]
do {
try deviceActivityCenter.startMonitoring(
activityName,
during: schedule,
events: events
)
print("✅ Monitoring started for \(activityName.rawValue) with time limit \(timeLimit.minute ?? 0) minutes.")
} catch {
print("❌ Failed to start monitoring \(activityName.rawValue): \(error.localizedDescription)")
}
}
// MARK: - DeviceActivityMonitor Overrides
override func intervalDidStart(for activity: DeviceActivityName) {
print("🟢 Interval for \(activity.rawValue) started.")
}
override func intervalWillStartWarning(for activity: DeviceActivityName) {
print("⚠️ Warning: \(activity.rawValue) is about to start.")
}
/// Handles warnings for approaching the time limit.
override func eventWillReachThresholdWarning(
_ event: DeviceActivityEvent.Name,
activity: DeviceActivityName
) {
super.eventWillReachThresholdWarning(event, activity: activity)
print("⚠️ Warning: \(activity.rawValue) is about to reach its time limit.")
print("⚠️ Event: \(event.rawValue)")
}
/// Handles when the time limit is reached.
override func eventDidReachThreshold(
_ event: DeviceActivityEvent.Name,
activity: DeviceActivityName
) {
super.eventDidReachThreshold(event, activity: activity)
print("🟢 Limit reached.")
Task { @MainActor in
print("🕒 \(activity.rawValue) has reached its time limit.")
print("🕒 Event: \(event.rawValue)")
guard let (selection, _) = monitoringSelections[activity] else {
print("⚠️ No selection configured for \(activity.rawValue).")
return
}
blockApps(for: selection)
}
}
// MARK: - Blocking Logic
/// Blocks the selected apps/categories.
private func blockApps(for selection: FamilyActivitySelection) {
print("🔒 Blocking apps/categories for selection.")
print("- Applications: \(selection.applicationTokens)")
print("- Categories: \(selection.categoryTokens)")
let store = ManagedSettingsStore()
store.shield.applications = selection.applicationTokens
store.shield.applicationCategories = .specific(selection.categoryTokens)
print("🔒 Apps/categories blocked successfully.")
}
}
Hello, I would like to change the aspect (scale, texture, color) of a 3D element (Model Entity) when I hovered it with my eyes. What should I do If I want to create a request for this feature? And how would I know if it will ever be considered or when it will appear?