Hi everybody, I have 2 separate animations run.usdz and walk.usdz animation files which are loaded perfectly in Reality Composer Pro and in the RealityKit application. I want to gradually increase the speed of my player by switching blending weight values from 0.0 (walking) to 1.0 (full speed running). let rabbit = await RabbitBuilder.loadWalkingRabbit() let runningRabbit = await RabbitBuilder.loadRunningRabbit() rabbit.scale = SIMD3(0.05, 0.05, 0.05) runningRabbit.scale = SIMD3(0.05, 0.05, 0.05) let walkAnimation = rabbit.availableAnimations let runAnimation = runningRabbit.availableAnimations RabbitWalker.walkAnim = walkAnimation.first! RabbitWalker.runAnim = runAnimation.first! guard let walk = RabbitWalker.walkAnim, let run = RabbitWalker.runAnim else { return } let blendTree = BlendTreeAnimation<JointTransforms>( BlendTreeBlendNode(sources: [ BlendTreeSourceNode(source: walk.definition, name: "walk", weight: .value(1 - weight)), BlendTreeSourceNode(source: run.definition, name: "run", weight: .value(weight)) ]), name: "rabbitLocomotion", repeatMode: .repeat, offset: TimeInterval(elapsed) ) // I have runtime error after executing this line: "Cannot add incompatible timeline type to blend tree." guard let resource = try? AnimationResource.generate(with: blendTree) else { return } entity.playAnimation(resource) static func loadWalkingRabbit() async -> Entity? { do { let scene = try await Entity(named: "Scene", in: realityKitEnvironmentBundle) guard let rabbit = await scene.findEntity(named: "RabbitWalk") else { return nil } await rabbit.removeFromParent() return rabbit } catch { return nil } } static func loadRunningRabbit() async -> Entity? { do { let scene = try await Entity(named: "Scene", in: realityKitEnvironmentBundle) guard let rabbit = await scene.findEntity(named: "RabbitRun") else { return nil } await rabbit.removeFromParent() return rabbit } catch { return nil } } But when I run this code I have this error; Cannot add incompatible timeline type to blend tree. By the way I have looked to developer's sample codes from here but I couldn't find any relevant BlendTreeAnimation sample which blends 2 animations. I would very happy if someone could direct me to a solution. Regards.

Hi Apple, Can you please add support for the Nintendo Switch 2 Pro Controller? The first one is supported but the Switch 2 has been out nearly a year now and a lot of people want to use these controllers with macOS and iOS. Can you please consider adding support? Thank you.

Hi there, I've discovered an issue with gesture handling in RealityKit when setting the camera’s fieldOfViewOrientation to horizontal. For instance, if I render a simple box at the center of the view with a collision shape that exactly matches its dimensions, the actual hit area behaves as if it's smaller than the box. Additionally, when attempting to drag the box away from the center, the hit area appears misaligned—offset slightly towards the center. Since the default fieldOfViewOrientation is vertical and everything works as expected in that mode, it seems that the gesture system might be assuming a vertical FOV. Given that the API allows setting it to horizontal, perhaps gestures should function correctly regardless of the orientation? Thank you!

Attempting to bring up the access point yields the following error log: [GameCenterOverlayService] Failed to create GameOverlayUI Dashboard Remote Proxy [GameCenterOverlayService] Could not create endpoint for service name: com.apple.GameOverlayUI.dashboard-service [GameCenterOverlayService] Failed to create GameOverlayUI Dashboard Remote Proxy [GameCenterOverlayService] Could not create endpoint for service name: com.apple.GameOverlayUI.dashboard-service [GameCenterOverlayService] Failed to create GameOverlayUI Dashboard Remote Proxy [GameCenterOverlayService] Failed to create GameOverlayUI Dashboard Remote Proxy The same code (which is a single line setting 'active' to true) works on physical devices and on the simulator in iOS 18.6 I haven't been able to find any mention of this issue online. Any suggestions or help greatly appreciated.

Updated my app to include turn-based matches. Beta testing through FlightTest and all was well between iOS 18.x and 26.2 devices. One beta tester upgraded to 26.2 during beta testing and now when the MatchMaker VC is opened, it does not show existing matches. Worse, he can create new matches and play his turn, but the new match won't even show up in MMVC, even after opponent takes turn. My app has been reviewed and is ready for release, but I'd like to know how to solve this before I release. He has tried re-installing the app, including an updated FlightTest version that is the same as the about-to-be-released reviewed version.

For apps that support Game Center, calling presentViewController on a GKGameCenterViewController yields no data for leaderboards or achievements, regardless of which iOS version you're simulating (works fine on device, but doesn't work in simulator).

Hi, I’m stuck with submitting a Game Center leaderboard and wanted to ask if others are seeing the same issue. My setup: App is already live on the App Store Game Center capability is enabled Leaderboard works perfectly in TestFlight (scores are submitted and visible) Problem: When I try to submit the leaderboard for review, I get: “A Game Center enabled app version must be added for review.” This is confusing because: The app already includes Game Center The app is already approved and published Apple documentation says Game Center components can be submitted without a new app version I also tried recreating the leaderboard and checking all settings, but the issue persists. Is this a known App Store Connect issue? Or is there something I’m missing? Thanks!

Why you don’t fix that ?

Dear Apple Developer Technical Support Team, We are currently integrating Apple Search Ads attribution (SKAdNetwork / AdAttributionKit) for our application, but we have been unable to receive any attribution callbacks from Apple. We would appreciate your assistance in diagnosing this issue. App Information: App ID: 1531290216 Bundle ID: com.volvapps.tk2.cn Callback Endpoint: Our server endpoint for receiving attribution postbacks is: https://volvgames.com/.well-known/skadnetwork/report-attribution Issue Description: We have conducted multiple tests under different scenarios, but in all cases, our server has not received any callback from Apple. Test Scenarios: ① Xcode Installation Test Built and launched the app directly via Xcode. Called the following APIs within the app: SKAdNetwork registerAppForAdNetworkAttribution SKAdNetwork updateConversionValue:value Result: No callback received on our server. ②On-Device Developer Mode Test (AdAttributionKit) Enabled AdAttributionKit Developer Mode on a physical iPhone. Configured a development postback using the app’s Bundle ID. Used either the provided developer postback URL or manually entered our endpoint. Created and triggered the postback via “Send Development Postback”. Result: No callback received. ③Additional Attempts Modified the callback URL from: https://volvgames.com/.well-known/skadnetwork/report-attribution to: https://volvgames.com/ Repeated tests under both Xcode and Developer Mode environments. Also attempted triggering postbacks after calling the attribution APIs within the app. Result: Still no callback received in all cases. Additional Question: We understand that certain files may be required for review or troubleshooting. However, we were unable to find where to upload attachments when submitting this request. We would like to provide the following files for your reference: info.plist AdAttribution.mm Could you please advise how we can submit these files to assist with the investigation? We would greatly appreciate any guidance or suggestions you may have regarding this issue. Please let us know if further information is required. Thank you for your support.

I just wonder what to do futures iPhone will change update

The background I'm finally working to convert my very old Mac kaleidoscope application, ScopeWorks, which was written in OpenGL and Objective-C, to a Multiplatform app in SwiftUI and Metal. I'm using the MetalKit MTKView class, wrapped for SwiftUI as an NSViewRepresentable or UIViewRepresentable. I then provide an MTKViewDelegate that provides a draw method. The draw method fetches the current render pass descriptor, creates a command buffer, sets up a render pipeline, and does its drawing. My renderer's makePipeline method looks like this: func makePipeline() { let library = device.makeDefaultLibrary() let pipelineDesc = MTLRenderPipelineDescriptor() pipelineDesc.vertexFunction = library?.makeFunction(name: "vertex_main") pipelineDesc.fragmentFunction = library?.makeFunction(name: "fragment_main") pipelineDesc.colorAttachments[0].pixelFormat = .bgra8Unorm pipeline = try! device.makeRenderPipelineState(descriptor: pipelineDesc) } And my shaders look like this: struct VertexOut { float4 position [[position]]; float2 texCoord; }; vertex VertexOut vertex_main(const device float2* position [[buffer(0)]], uint vid [[vertex_id]]) { VertexOut out; float2 pos = position[vid]; out.position = float4(pos, 0, 1); out.texCoord = pos * 0.5 + 0.5; // basic mapping return out; } fragment float4 fragment_main(VertexOut in [[stage_in]], texture2d<float> tex [[texture(0)]], constant float4& color [[buffer(1)]]) { constexpr sampler s(address::repeat, filter::linear); // float4 texColor = tex.sample(s, in.texCoord); // return texColor * color; float4 textureColor = {1, 2, 3, 4}; if (all(color == textureColor)) { return tex.sample(s, in.texCoord); } else { return color; } // Sample the texture directly — no color tint applied return tex.sample(s, in.texCoord); } The first part of my MTKViewDelegate's draw method looks like this: func draw(in view: MTKView) { guard let drawable = view.currentDrawable, let descriptor = view.currentRenderPassDescriptor, let pipeline = pipeline, let texture = texture else { return } let commandBuffer = commandQueue.makeCommandBuffer()! let encoder = commandBuffer.makeRenderCommandEncoder(descriptor: descriptor)! encoder.setRenderPipelineState(pipeline) encoder.setFragmentTexture(texture, index: 0) descriptor.colorAttachments[0].clearColor = MTLClearColor(red: 0.0, green: 0, blue: 0, alpha: 1.0) // Draw six equilateral triangles forming the hexagon let radius: Float = 0.6 for i in 0..<6 { let angle = Float(i) * (.pi / 3) let cosA = cos(angle) let sinA = sin(angle) let nextA = Float(i+1) * (.pi / 3) let cosB = cos(nextA) let sinB = sin(nextA) let verts: [simd_float2] = [ simd_float2(0, 0), simd_float2(radius * cosA, radius * sinA), simd_float2(radius * cosB, radius * sinB) ] encoder.setVertexBytes(verts, length: MemoryLayout<simd_float2>.stride * 3, index: 0) // Tell the fragment shader to use the texture color. var textureColor: simd_float4 = simd_float4(1, 2, 3, 4) encoder.setFragmentBytes(&textureColor, length: MemoryLayout<SIMD4<Float>>.stride, index: 1) encoder.drawPrimitives(type: .triangle, vertexStart: 0, vertexCount: 3) One of the things the existing app does is load PNG or TIFF images with an alpha channel, and then overlay parts of the image on top of themselves flipped, so you get interesting Moiré patterns in the lines in the resulting kaleidoscope. For now I'm working on a single sample image, loading it into a texture in Metal, and just rendering it as a hexagon and drawing lines for the triangles that make up the hexagon. (For now I'm using the vertex coordinates as the texture coordinates, so I get a hexagonal part of my texture rather than a single triangular part tessellated into a hexagon. I'll fix that later.) In both iOS and OS I set the clear color to black at the beginning of the draw function. The issue: The source image is mostly transparent, but with a lot of partly transparent pixels. Here's what it looks like in Photoshop, where you can see the transparent parts as a checkerboard pattern: (I tried to crop the original image to show the approximate part that I'm rendering in a hexagon, but it's not exact. Look for the same shapes in the different images to compare them.) When I render my hexagon in the Metal view in the iOS version of the app, it looks like it's forcing each pixel to fully opaque or fully transparent: And in the macOS version of the app, it seems to force ALL the pixels to opaque: I haven't shown all the setup code, because it's' a lot. Is there some rendering mode setup I'm missing in order to get it to draw the pixels into the output based on their opacity, including partial opacity?

I'm trying to scale the physics of a scene without changing the apparent size to avoid the low-speed zeroing-out of motion that the physics simulation does. I found a technique for using separate simulation and physics roots in the docs, but it relies on ARView, which VisionOS doesn't have. This seems more elegant than scaling absolutely everything with shared root -- any chance I'm just failing in my searches to find the equivalent functionality?

Hi everyone, I'm new to visionOS development. I'm trying to create a physics-based scene (with gravity) where users can pick up and move objects on a workbench. I am struggling with physics interactions during the drag gesture: Kinematic Mode: If I switch to .kinematic during the drag, the object moves smoothly but clips through other objects (no collisions). Dynamic Mode: I tried keeping it .dynamic and applying linear velocity toward the hand position, but the movement feels laggy and unresponsive. Hybrid Approach: I tried switching to .kinematic during DragGesture.onChange and back to .dynamic on collision, but this causes the entity to jitter/shake violently when touching other objects. Has anyone found a clean way to drag objects while maintaining solid collisions. Thanks for your help!

Hello everyone, I'm working on a screen recording app using ScreenCaptureKit and I've hit a strange issue. My app records the screen to an .mp4 file, and everything works perfectly until the .captureMicrophone is false In this case, I get a valid, playable .mp4 file. However, as soon as I try to enable the microphone by setting streamConfig.captureMicrophone = true, the recording seems to work, but the final .mp4 file is corrupted and cannot be played by QuickTime or any other player. This happens whether capturesAudio (app audio) is on or off. I've already added the "Privacy - Microphone Usage Description" (NSMicrophoneUsageDescription) to my Info.plist, so I don't think it's a permissions problem. I have my logic split into a ScreenRecorder class that manages state and a CaptureEngine that handles the SCStream. Here is how I'm configuring my SCStream: ScreenRecorder.swift // This is my main SCStreamConfiguration private var streamConfiguration: SCStreamConfiguration { var streamConfig = SCStreamConfiguration() // ... other HDR/preset config ... // These are the problem properties streamConfig.capturesAudio = isAudioCaptureEnabled streamConfig.captureMicrophone = isMicCaptureEnabled // breaks it if true streamConfig.excludesCurrentProcessAudio = false streamConfig.showsCursor = false if let region = selectedRegion, let display = currentDisplay { // My region/frame logic (works fine) let regionWidth = Int(region.frame.width) let regionHeight = Int(region.frame.height) streamConfig.width = regionWidth * scaleFactor streamConfig.height = regionHeight * scaleFactor // ... (sourceRect logic) ... } streamConfig.pixelFormat = kCVPixelFormatType_32BGRA streamConfig.colorSpaceName = CGColorSpace.sRGB streamConfig.minimumFrameInterval = CMTime(value: 1, timescale: 60) return streamConfig } And here is how I'm setting up the SCRecordingOutput that writes the file: ScreenRecorder.swift private func initRecordingOutput(for region: ScreenPickerManager.SelectedRegion) throws { let screeRecordingOutputURL = try RecordingWorkspace.createScreenRecordingVideoFile( in: workspaceURL, sessionIndex: sessionIndex ) let recordingConfiguration = SCRecordingOutputConfiguration() recordingConfiguration.outputURL = screeRecordingOutputURL recordingConfiguration.outputFileType = .mp4 recordingConfiguration.videoCodecType = .hevc let recordingOutput = SCRecordingOutput(configuration: recordingConfiguration, delegate: self) self.recordingOutput = recordingOutput } Finally, my CaptureEngine adds these to the SCStream: CaptureEngine.swift class CaptureEngine: NSObject, @unchecked Sendable { private(set) var stream: SCStream? private var streamOutput: CaptureEngineStreamOutput? // ... (dispatch queues) ... func startCapture(configuration: SCStreamConfiguration, filter: SCContentFilter, recordingOutput: SCRecordingOutput) async throws { let streamOutput = CaptureEngineStreamOutput() self.streamOutput = streamOutput do { stream = SCStream(filter: filter, configuration: configuration, delegate: streamOutput) // Add outputs for raw buffers (not used for file recording) try stream?.addStreamOutput(streamOutput, type: .screen, sampleHandlerQueue: videoSampleBufferQueue) try stream?.addStreamOutput(streamOutput, type: .audio, sampleHandlerQueue: audioSampleBufferQueue) try stream?.addStreamOutput(streamOutput, type: .microphone, sampleHandlerQueue: micSampleBufferQueue) // Add the file recording output try stream?.addRecordingOutput(recordingOutput) try await stream?.startCapture() } catch { logger.error("Failed to start capture: \(error.localizedDescription)") throw error } } // ... (stopCapture, etc.) ... } When I had the .captureMicrophone value to be false, I get a perfect .mp4 video playable everywhere, however, when its true, I am getting corrupted video which doesn't play at all :-

When I go to the leadership section, I have 8 currently active leaderboards. When I select "manage scores and players" I see 9 leaderboards, from which 5 are legacy and my 4 new ones are not listed (also it comes in a very old design). New players will score in the 4 new leaderboards but I need to remove the top score which was the developer score, to give them a chance, but the new leaderboards are not accessible.

I am exploring the development of a utility app that provides real-time feedback to users based on their active screen content (e.g., providing text suggestions for various communication apps). To achieve this, I am looking at using ReplayKit and Broadcast Upload Extensions to process screen frames in the background via OCR. I have a few questions regarding the "Screen Recording" permission and App Store Review: Permission Clarity: Is it possible to trigger the Screen Recording permission request in a way that clearly communicates the "utility" nature of the app without the system UI making it look like a standard video recording? Background Persistence: Can a Broadcast Extension reliably stay active in the background while the user switches between other third-party apps (like messaging or social apps) for the purpose of continuous OCR processing? App Store Guidelines: Are there specific "Privacy & Data Use" guidelines I should be aware of when an app requires persistent screen access to provide text-based suggestions? I want to ensure the user experience is transparent and that the permission flow feels like a "helper utility" rather than a security risk. Any insights on the best APIs to use for this specific background processing would be appreciated.

For an app of mine I use CGSetDisplayTransferByTable to adjust the gamma table of the device. Since macOS Tahoe, these modifications are silently ignored. The display's actual gamma curve remains unchanged despite the API reporting successful completion. I've filed a FB for it a few weeks ago, and would love to figure out what could be causing this. FB18559786

In ARKit there is ARGeoAnchor, which lets you anchor content using latitude and longitude so objects stay fixed to a real-world location. Is there an equivalent feature in RealityKit? I want to place points in the world and make sure they don't move or drift after placement. If RealityKit doesn't support this directly, what is the recommended approach?

I asked AI to build a realistic ocean shader for a VisionOS project using RealityKit. It gave a bunch instructions and asked me to connect large amount of nodes for the ShaderGraph in the Reality Composer Pro. I am just wondering if AI can help to generate the Metal shader code directly, or build the ShaderGraph nodes for me automatically.

Hello, I have noticed a performance drop on SpriteKit-based projects running on iOS 26.3. The issue seems very similar to the issue reported on iOS 26.0, and later solved from iOS 26.2 beta 3: https://developer.apple.com/forums/thread/800952?answerId=870617022#870617022 With 26.3, it seems a regression occured. Below is the same SpriteKit scene used to test framerate on different devices: import SpriteKit import SwiftUI class BareboneScene: SKScene { override func didMove(to view: SKView) { size = view.bounds.size anchorPoint = CGPoint(x: 0.5, y: 0.5) backgroundColor = .darkGray let roundedSquare = SKShapeNode(rectOf: CGSize(width: 150, height: 75), cornerRadius: 12) roundedSquare.fillColor = .systemRed roundedSquare.strokeColor = .black roundedSquare.lineWidth = 3 addChild(roundedSquare) let action = SKAction.rotate(byAngle: .pi, duration: 1) roundedSquare.run(.repeatForever(action)) } } struct BareboneSceneView: View { var body: some View { SpriteView( scene: BareboneScene(), debugOptions: [.showsFPS] ) .ignoresSafeArea() } } #Preview { BareboneSceneView() } Running this very basic spritekit scene on my device and I can not reach an FPS of 60. Instead, it stalls around 40. I see the same in my AppStore published SpriteKit games. As you can see in the discussion of the linked forum topic, the regression has been noticed by others as well. Can you please look into this, and let us know if there is an outstanding action to resolve it already? It's very problematic for published games suddenly dropping to 40FPS on even the most modern iOS devices.