A Summary of the WWDC25 Group Lab

In Itunes Connect you can move subscription items up/down inside a subscription group to establish their relative level.But if I have essentially the same subscription, but differing only in duration, how can I assign the subscription items to the same subscription level?A user changing the subscription duration should be considered a crossgrade, not a upgrade or downgrade.I see no way to set 2 subscriptions items to the same subscription level in a subscription group in itunes Connect.Is my assumption that 2 subscription items can both have the same subscription level valid ??

I'm using a UICollectionViewCompositionalLayout, and an exception is thrown when I load my collection view.The exception says Cannot solve for a non-group item.Any idea what might be wrong? Or how to fix it?Here's my layout codefunc sideBarSectionCollectionLayout()->UICollectionViewCompositionalLayout { let size = NSCollectionLayoutSize(widthDimension:.fractionalWidth(1), heightDimension:.estimated(105)) let item = NSCollectionLayoutItem(layoutSize: size) let group = NSCollectionLayoutGroup.horizontal(layoutSize: size, subitems: [item]) let section = NSCollectionLayoutSection(group: group) section.contentInsets = NSDirectionalEdgeInsets(top: 5, leading: 5, bottom: 5, trailing: 5) section.interGroupSpacing = 5 return UICollectionViewCompositionalLayout(section: section) }My cells are set up in the storyboard.I'm running xcode 11.1 (11A1027), and catalina 10.15.1 Beta (19B68f)It started after the catalina upgrade from the GM.Here's the relevant part of the stack trace.2019

I would like to request the ability to group windows in mission control so that I can easily swap all windows between my 2 external monitors easily. Anyway to make swapping all windows between the displays easier would be a huge time saver. Making this an option in shortcuts would work as well.

in my app i added keychain access group in capabilities, then i checked the entitlement file, the value of keychain-access-groups is 94KV3E626X.com.frank.keychainAccessGroup I turned on Automatically manage signing in xcode everything looks fine. i tested in simulator and device in debug environment, and it works fine. I could shared data across main app and app extension... but after I build the app thru pipeline and use adhoc environment and get the .app file, i run this command in terminal: codesign --display --entitlements :- myapp.app it shows the value of keychain-access-groups is NOT 94KV3E626X.com.frank.keychainAccessGroup that is defined before. it is replaced by the app id 94KV3E626X.com.frank.development.adhoc. Does anyone know why the value of keychain-access-groups is replaced? it supposes to be the one i defined in Xcode, which is 94KV3E626X.com.frank.keychainAccessGroup

With the new subscription groups, users can upgrade and downgrade from outside the app. Is there any mechanism that lets the app know when those events have happened? Or do we have to keep track of it ourselves by parsing the receipt file every time the app is opened?

We recently added keychain-access-group to our macOS app but the app failed to open in big sur (macOS 11). It works fine in Monterey and Ventura. The crash log shows. Exception Type: EXC_CRASH (Code Signature Invalid) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Termination Reason: Namespace CODESIGNING, Code 0x1 Here is our entitlement and provision profile codesign -d --entitlements <plist version=1.0> <dict> <key>com.apple.security.device.audio-input</key><true/><key>com.apple.security.device.camera</key><true/> <key>keychain-access-groups</key> <array> <string>Q76YUSCMX8.com.veevasystems.crmdesktop</string> </array> </dict> </plist> The provision profile shows security cms -D -i <key>ApplicationIdentifierPrefix</key> <array> <string>Q76YUSCMX8</string> </array> ... <key>Entitlements</key> <dict>

A weird window popped up saying Battery 3 Demo Installer needs permission to access system. Tracing it to:MusicTechFocus/Music Tech Focus Logic Pro/Plug-in demo versions/Battery 3 Demo Installer.appApparently it was triggered by Spotlight Search.macOS Sierra Version 10.12 Beta (16A270f).That file has been there for years. Don't know why it decided to popup.12:10:45.416372 -0700Battery 3 Installergetgrouplist called triggering group enumerationcom.apple.message.value: 50com.apple.message.domain: com.apple.system.libinfocom.apple.message.result: noopcom.apple.message.signature: getgrouplistSenderMachUUID: 00000000-0000-0000-0000-000000000000

According to upcoming privacy manifest document, NSUserDefaults is only allowed for a use for the app itself. It is serious for developers who makes App Extensions. https://developer.apple.com/documentation/bundleresources/privacy_manifest_files/describing_use_of_required_reason_api CA92.1 Declare this reason to access user defaults to read and write information that is only accessible to the app itself. This reason does not permit reading information that was written by other apps or the system, or writing information that can be accessed by other apps. Developers, please submit a request to add the permission of App Group. https://developer.apple.com/contact/request/privacy-manifest-reason/

I seem to have found a BUG in XCode 9, however I can't submit it, so I'll submit it here and hope one of you that can submit bugs can forward it to Apple.It's an easy bug to test: Create a project, then create a Group. In Xcode 8.3.3 this would create a Group in Xcode but not a subdirectory in Finder. NOW it also generates a Subdirectory (check your finder directory). I discovered this by following some directions in a book on Core Data. I started in Xcode and created the groups as described in the book. Later I downloaded Xcode 9 and started over (creating a new project), creating the group now creates a subdirectory also. This might actually be NICE....if it weren't for the fact that some files, like info.plist are expected to be in the main project directory, or at least it errored when I moved the info.list to the Group, as described in the book (it works in Xcode 8.3.3, does not work in Xcode 9 beta 5).I tried this in iOS, as well as in macOS (both create subd