A Summary of the WWDC25 Group Lab

In my project I have an aggregate target that runs a script that generates a web bundle in a folder build/ with all the html/css/resources needed for the website. These resources are generated via a script. I use these resources in multiple targets so I have created an aggregate target to make this simple. However, I have not found this simple. If I have the aggregate target output to $(DERIVED_FILE_DIR)/ then it outputs to a path that looks like this DerivedData/BrowserApp-bla/Build/Intermediates.noindex/BrowserApp.build/Debug-iphonesimulator/WebBundle.build/DerivedSources/build/index.html If I then drag that folder into Xcode and create a folder that references it. Then take that reference and make it relative to build products I get this A9DE6A502E41E397005EF4E0 /* build */ = { isa = PBXFileSystemSynchronizedRootGroup; name = build; path = ../../Intermediates.noindex/BrowserApp.build/Debug-iphonesimulator/WebBundle.build/DerivedSources/build; sourceTree = BUILT_PRODUCTS_DIR; }; This is because to the main

Hi everyone, I’m building an iOS app that originally targeted iPhone using NavigationStack. Now I’m adapting it for iPad and switched to using NavigationSplitView to support a three-column layout. The structure looks like this: NavigationSplitView { A // Sidebar } content: { B // Middle column – this shows a list } detail: { C // Detail view } The issue is with the list shown in view B (the content column). It appears completely unstyled, as if it’s using .listStyle(.plain) — with no background material, and a very flat look. I can understand that this might be intentional on iPad to visually distinguish the three columns. However, the problem is that this same unstyled list also appears on iPhone, even though iPhone only shows a single column view at a time! I tried explicitly setting .listStyle(.insetGrouped) or .listStyle(.grouped) on the list in view B, but it makes no difference. When I go back to NavigationStack, the list in B is styled properly, just as expected — but then I lose the enhanced

Hi everyone, I’m building an iOS app that originally targeted iPhone using NavigationStack. Now I’m adapting it for iPad and switched to using NavigationSplitView to support a three-column layout. The structure looks like this: NavigationSplitView { A // Sidebar } content: { B // Middle column – this shows a list } detail: { C // Detail view } The issue is with the list shown in view B (the content column). It appears completely unstyled, as if it’s using .listStyle(.plain) — with no background material, no grouped sections, and a very flat look. I can understand that this might be intentional on iPad to visually distinguish the three columns. However, the problem is that this same unstyled list also appears on iPhone, even though iPhone only shows a single column view at a time! I tried explicitly setting .listStyle(.insetGrouped) or .listStyle(.grouped) on the list in view B, but it makes no difference. When I go back to NavigationStack, the list in B is styled properly, just as expected —

Hey there! So, I'm trying to see what I'm able to do with the Device Activity Report Extension, and I have a few questions about the following quote: To protect the user’s privacy, your extension runs in a sandbox. This sandbox prevents your extension from making network requests or moving sensitive content outside the extension’s address space. In particular, what constitutes the address space for this extension? Can I save data to a UserDefaults object that only the extension can access? (Apps like Opal allow the user to label apps as distracting and non-distracting, and I'm wondering how they do that!) From what I've read, I believe it cannot write to a shared app group or model (and I just want to confirm this) It also seems that there's nothing preventing it from reading data from the main app, so I'm just wondering if it's able to read data from an app group or model with no problem. Thanks in advance!

Background I'm developing an iOS app with Live Activities that allows users to select custom background images. While these custom images display correctly in widgets, they fail to appear in Live Activities on both Lock Screen and Dynamic Island, despite successful image loading and data transfer. Technical Details iOS Version: Testing on iOS 17.2+ Image Storage: Using App Group shared container for image sharing between main app and widget extension Image Loading: Successfully confirmed via logs - images load correctly with proper dimensions UI Framework: SwiftUI with ActivityKit What Works ✅ Custom images display correctly in Home Screen widgets ✅ Built-in bundled images work in Live Activities ✅ Image data successfully transfers via App Group shared container ✅ Image loading logs show successful UIImage creation with correct dimensions What Doesn't Work ❌ Custom user images don't display in Live Activities (Lock Screen) ❌ Custom user images don't display in Dynamic Island ❌ Images appear

Xcode automatic signing consistently fails for the macOS target when adding the App Groups capability, even though the Developer Portal is correctly configured. Error: Provisioning profile “Mac Team Provisioning Profile: com.example.testapp.mobile” doesn’t support the App Groups capability. Setup: • Bundle ID: com.example.testapp.mobile • App Group: $(TeamIdentifierPrefix)group.com.example.testapp.mobile Troubleshooting Steps Tried (None Helped): • Changed bundle identifiers and deleted/recreated them in the Developer Portal • Deleted and recreated App Groups • Removed and re-added the developer account in Xcode • Deleted all provisioning profiles from the system • Cleared Derived Data and Xcode caches • Even tried on a clean macOS system This setup used to work previously. The issue seems to have started after the Apple Developer account was renewed.

Summary When a SwiftUI widget uses a Link containing an Image modified with .widgetAccentedRenderingMode (using any mode except .fullColor), tapping the image on the widget launches the app but does not pass the expected deep link URL to the SceneDelegate. Steps to Reproduce Create a SwiftUI Widget View with a Link: struct ImageView: View { var image: UIImage var body: some View { Link(URL(string: myapp://image)!) { Image(uiImage: image) .resizable() .widgetAccentedRenderingMode(.accentedDesaturated) // or any mode other than .fullColor .scaledToFill() .clipped() } } } Add Custom URL Scheme in Info.plist: CFBundleURLName com.company.myapp CFBundleURLSchemes myapp Implement Deep Link Handling in SceneDelegate: func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) { if let url = connectionOptions.urlContexts.first?.url { handle(url) } } func scene(_ scene: UIScene, openURLContexts urlContexts: Set) { if let url = urlContexts.first?