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“A Summary of the WWDC26 Group Lab”

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Any update during WWDC26 on UWB direction-finding for 3rd party devices using the NI framework, etc?

Kind folks, Was all setup for online access to several Q&A sessions at this WWDC, even posted some questions. But other priorities on my project prevented me from attending. Did any of you hear any news on direction finding with 3rd party devices at this year's WWDC? My current understanding is that (for iPhones later than 15) the NI framework returns null for direction. Apple recommends use of the ARkit in conjunction with NI (tech session way back in WWDC22!) FYI, I've been trying hard to get any information on this topic. Would be happy to share what public information/speculation I've found (including how Apple get's such good range and direction info in their Find My app for their AirTag 2 😉). Perhaps we can set up a small discussion group for sharing insights and experiences with emerging UWB technology. Comments appreciated. Mike

Community Apple Developers Nearby Interaction Core Location visionOS ARKit

733

Jun ’26

Reply to Guidance for cases when you can link to an external shop from an app

Thank you for your question. During WWDC, you can take advantage of Labs, where Apple engineers, designers, and App Store experts can provide personalized guidance to your questions. Labs are available through the end of WWDC on June 9. Visit Apple Developer to learn more about eligibility and request an appointment.

App & System Services StoreKit

Jun ’23

WatchKit groups layout questions

Hi,I've started working on my first WatchKit app UI, and I've run into some things that I don't know if it's possible to solve in WatchKit without using SwiftUI (or at all):1) Is it possible to have a group element that's sized to fill all remaining space? E.g. have a vertical group set to fill whole screen height, one label at the top and one at the bottom, and some group in the middle automatically taking the space that's left between them. Or a horizontal group filling the screen width, with a label on the left and right and a spacer in between that uses whatever space is left.2) Is it possible to configure a group or another element to keep a constant aspect ratio, i.e. its width relative to its height or the other way around? E.g. to have an element configured to fill the screen width, and to automatically have the same height as the width, so that it always stays a perfect square.

App & System Services General WatchKit

554

Jun ’20

App Groups problem

I have an app with CallKit Extension and when I try to pass data from ViewController to the Directory Extension with App Groups and UserDefaults I have this error:2017-11-12 13:42:07.199664+0100 CallKitTest[6851:2093165] [User Defaults] Couldn't read values in CFPrefsPlistSource<0x101a25f60> (Domain: group.com.rubenfernandez.CallKitTest, User: kCFPreferencesAnyUser, ByHost: Yes, Container: (null), Contents Need Refresh: Yes): Using kCFPreferencesAnyUser with a container is only allowed for System Containers, detaching from cfprefsdAny ideas?Thanks!

App & System Services Core OS Files and Storage

1.8k

Nov ’17

watchOS 2 new API summary

We read through all of the documentation, Xcode 7 header files, and tried to summarize everything we could figure out about watchOS 2. We hope this is a quick jumping off point for developers who just want a quick description and links directly into the Apple documentation. http://www.sneakycrab.com/blog/2015/6/8/watchos-20-tldrPlease give feedback, corrections and new discoveries, and we'll update the post with new information as we find it.

App & System Services Core OS Beta watchOS

323

Jun ’15

How to remove empty subscription group

I am getting rejected from Apple because of subscription groups that I do not use. How can I solve this?

App & System Services StoreKit In-App Purchase

446

Apr ’21

Needed Actions for Group Feature

Hi! The app that I am building has the ability for users to join and be added to groups. Are there any requirements from Apple beyond the ability to leave and report the group that the user must be able to do? I read through the developer guidelines but I just wanted to make sure before submission. Thank you!

App & System Services General Collaboration

1.1k

Aug ’22

Reply to ubc_msync have a bug

(lldb) image lookup -a 0xffffff801a5ac283 Address: kernel[0xffffff80003ac283] (kernel.TEXT.text + 344707) Summary: kernelpanic + 99 at debug.c (lldb) image lookup -a 0xffffff801a6d91ea Address: kernel[0xffffff80004d91ea] (kernel.TEXT.text + 1577450) Summary: kernelpanic64 + 218 at trapnative.c:152 (lldb) image lookup -a 0xffffff801a55a51f Address: kernel[0xffffff800035a51f] (kernel.TEXT.text + 9503) Summary: kernelhndl_double_fault + 15 (lldb) image lookup -a 0xffffff801a6cd95f Address: kernel[0xffffff80004cd95f] (kernel.TEXT.text + 1530207) Summary: kernelusimplelock + 47 at machineroutines.c (lldb) image lookup -a 0xffffff801a5c95ad Address: kernel[0xffffff80003c95ad] (kernel.TEXT.text + 464301) Summary: kernelthread_dispatch + 445 at sched_prim.c:2768 (lldb) image lookup -a 0xffffff801a5c906e Address: kernel[0xffffff80003c906e] (kernel.TEXT.text + 462958) Summary: kernelthreadinvoke + 1710 at schedprim.c:2559 (lldb) image lookup -a 0xffffff801a5c7d0f Ad

App & System Services Core OS

Feb ’21

Reply to When I want to delete the application, I keep getting the following error. No one on the apple side is helping.

App Store Distribution & Marketing App Store Connect

Jun ’23

Reply to PWA vs Ionic Application vs Wrapped website in Ionic application

Safari & Web General

Jun ’23

Reply to Appstore app approval process social login

App Store Distribution & Marketing App Review

Jun ’23

How to access tab groups api on Safari

Hi all, I am on the Mac OS Monterey beta and I want an extension to handle some tab groups for me (switch to a specific tab group with a shortcut). Can someone guide me where I can find the documentation for tab groups in the safari extensions api.

Safari & Web General Safari Safari Extensions

1.3k

Aug ’21

CFPreferencesCopyKeyList for App Group

We use AppGroups to share information between app and extension.I need to get list of keys stored in the defaults. There is a method 'dictionaryRepresentation' which returns all keys and values. I'm worried if retreiving all values shoots up memory.There is a method in Core Foundation that only get's the keys, which I plan to use.CFArrayRef CFPreferencesCopyKeyList(CFStringRef applicationID, CFStringRef userName, CFStringRef hostName);I need help with the arguments.applicationID is the App Group bundle identifier.What should be used foruserName - kCFPreferencesCurrentUser or kCFPreferencesAnyUserhostName - kCFPreferencesCurrentHost or kCFPreferencesAnyHostThanks in advance

UI Frameworks UIKit UIKit

436

Feb ’19

What about App Groups?

Hello.I ran into a problem when creating Cocoa apps.When i send get-request to my local server - i get next message in console:[User Defaults] Failed to read values in CFPrefsPlistSource<0x6080000e6700> (Domain: com.apple.PowerManagement, User: kCFPreferencesAnyUser, ByHost: Yes, Container: (null)): accessing preferences outside an application's container requires user-preference-read or file-read-data sandbox access, detaching from cfprefsdI try create App Groups in Capabilities. Nothing...How can I fix it?I use Vapor like a web-service.

Code Signing Certificates, Identifiers & Profiles Signing Certificates Provisioning Profiles

444

Feb ’18

Reply to Co channel interference resolution

Please see our previous response to your question. https://developer.apple.com/forums/thread/830458?answerId=890688022#890688022 If you have any follow up questions, feel free to continue the conversation there for conciseness. If you have questions tying this into the LiveCommunicationKit and Push-To-Talk Q&A features announced at WWDC26, we have the relevant engineering team here to answer questions! Thank you!  Travis

Core OS

LiveCommunicationKit and Push-To-Talk Q&A

Jun ’26