Explore the various UI frameworks available for building app interfaces. Discuss the use cases for different frameworks, share best practices, and get help with specific framework-related questions.

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Wallpaper Api
Hey, I have an app that user selects wallpaper for iPhone. I want a feature that user can set wallpaper direct from app itself for lock screen and home screen not download the image and manually set the wallpaper. As my research there was a PhotoLibrary api that contains PLWallpaperImageViewController.h which allows you to set wallpaper directly. Thank You!
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Oct ’24
Prevent Virtual Keyboard for iOS App run in macOS
I have a (pretty basic) app I have developed which essentially just opens a pre-defined website (via URL) in WebView. It operates nicely in iOS and almost exactly as expected when run on my M1 in macOS with the exception that in macOS it keeps popping up a grey bar which ... after some investigating ... I have determined appears to be the virtual keyboard. Pressing escape clears it however I am trying to find some way of preventing it from coming up in the first place when the app is run in macOS. Is there a (hopefully simple) solution either through code or some app setting for this?
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284
Oct ’24
LinkPresentation startFetchingMetadata errors
I’m trying to use the Link Presentation app in my SwiftUI app. When I try to fetch metadata, I get quite a few errors in the console. Here’s a stripped down version of the code that causes errors: public struct URLMetadataLoader { public static func metadata(for url: URL) async -> LPLinkMetadata? { let metadataProvider = LPMetadataProvider() do { let metadata = try await metadataProvider.startFetchingMetadata(for: url) return metadata } catch { print("Failed to get metadata for URL: \(error.localizedDescription)") return nil } } } The errors I get on every call to fetch metadata are below. Thanks. Failed to resolve host network app id to config: bundleID: com.apple.WebKit.Networking instance ID: Optional([_EXExtensionInstanceIdentifier: 0501F943-B5B6-4F60-95B0-CDECFC2AE908]) Type: Error | Timestamp: 2024-10-07 12:17:36.877477-05:00 | Process: URLMetaDataMinimal | Library: ExtensionFoundation | Subsystem: com.apple.extensionkit | Category: default | TID: 0x1f1c18 Error acquiring assertion: <Error Domain=RBSServiceErrorDomain Code=1 "((target is not running or doesn't have entitlement com.apple.developer.web-browser-engine.rendering AND target is not running or doesn't have entitlement com.apple.developer.web-browser-engine.networking AND target is not running or doesn't have entitlement com.apple.developer.web-browser-engine.webcontent))" UserInfo={NSLocalizedFailureReason=((target is not running or doesn't have entitlement com.apple.developer.web-browser-engine.rendering AND target is not running or doesn't have entitlement com.apple.developer.web-browser-engine.networking AND target is not running or doesn't have entitlement com.apple.developer.web-browser-engine.webcontent))}> 0x12602cd80 - ProcessAssertion::acquireSync Failed to acquire RBS assertion 'XPCConnectionTerminationWatchdog' for process with PID=80284, error: (null) Failed to terminate process: Error Domain=com.apple.extensionKit.errorDomain Code=18 "(null)" UserInfo={NSUnderlyingError=0x600000c6fbd0 {Error Domain=RBSRequestErrorDomain Code=3 "No such process found" UserInfo={NSLocalizedFailureReason=No such process found}}} Failed to terminate process: Error Domain=com.apple.extensionKit.errorDomain Code=18 "(null)" UserInfo={NSUnderlyingError=0x600000c8cc60 {Error Domain=RBSRequestErrorDomain Code=3 "No such process found" UserInfo={NSLocalizedFailureReason=No such process found}}}
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666
Oct ’24
Apple Maps Not responding to scrolling, zooming, or tap gestures on custom pins
Scrolling and zooming I have two apps that utilize the Apple Maps and since I updated my xcode to use IOS18, some of the functionalities have either been missing or glitching, and when I roll back to IOS17.5, everything seems to work fine. When I use MKMapView and use mapView.isZoomEnabled = true mapView.isScrollEnabled = true Scrolling and zooming is still not working on IOS18 but IOS17.5 works fine. Clicking on custom annotations When I press on a custom annotation I add to the MapView, the gesture is sometimes recognized and most of the times not recognized. If I have 20 annotations, there is a possibility only 2 of them respond to tap gestures. Below is how I define the annotation. Annotation("Pin", coordinate: CLLocationCoordinate2D(latitude: latitude, longitude: longitude), anchor: .bottom) { Button(action: {print ("Pressed annotation"){ CustomPin() } }
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293
Oct ’24
How to skip library check in framework
I have build a framework name is HansTranslation.framework for iOS 18 only, because it is include Translation. My app is okay when I call this framework on iOS 18 device, but it is crash on iOS 17.6. below is error info: Symbol not found: _$s7SwiftUI4ViewP013_Translation_aB0E15translationTask_6actionQr0D00D7SessionC13C onfigurationVSg_yAIYactF Referenced from: <4E09A66F-7D9E-3793-A2D6-1BE167EAD3F5> /private/var/containers/Bundle/Application/90A1EF03-09DA-43B5-8946-8186CF9CC804/B uild SRT.app/Frameworks/HansTranslation.framework/HansTranslation (built for ios 18.0 which is newer than running OS) <8F146BA4-EBE8-32C5-9CD8-E30077AD8088> /System/Library/Frameworks/_Translation_SwiftUI. framework/_Translation_SwiftUI I known that iOS 17.6 is NOT include "Translation_SwiftUI. framework", so there is crash. I have notice that don't call this framework when iOS version less than iOS 18, my code control like API_AVAILABLE(ios(18.0)) or @available(iOS 18.0, *)). I try that set "Build Phases" -> Embed Framework -> Copy only when installing -> ON, it is okay on iOS 17.6, but it is not work on iOS 18. My framework in here: https://github.com/MingJieHan/HansTranslation My question that how to do? first way that change option for HansTranslation.framework, let it not link Translation_SwiftUI automatically, not success. second way that change my app option, let it not check library, I don't know how to do next step. please help me or give me some idea for those. Thanks.
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275
Oct ’24
Unable to import Charts in Xcode 16.1 beta 2
Failed to build module 'Charts'; this SDK is not supported by the compiler (the SDK is built with 'Apple Swift version 6.0 effective-5.10 (swiftlang-6.0.0.7.41 clang-1600.0.24.1)', while this compiler is 'Apple Swift version 6.0 effective-5.10 (swiftlang-6.0.0.9.11 clang-1600.0.26.2)'). Please select a toolchain which matches the SDK. Any fix yet?
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552
Sep ’24
Calling `requestAuthorization(options:completionHandler:)` in Swift 6 leads to `EXC_BAD_INSTRUCTION` crash.
I am in the process of evaluating Swift 6 and I noticed that when using the completion handler version of the requestAuthorization the application crashes with EXC_BAD_INSTRUCTION exception. Using this code: let center = UNUserNotificationCenter.current() center.requestAuthorization(options: [.alert, .sound, .badge]) { success, error in print(success) } Crashes when the project is build with Swift 6 and works normalising when build with Swift 5. The only solution that I have found so far is to switch to using the async version of that API: Task { let center = UNUserNotificationCenter.current() do { if try await center.requestAuthorization(options: [.alert, .sound, .badge]) == true { print("success") } else { print("fail") } } catch { print("Error") } } Is the a known issue? I have submitted feedback with ID "FB15294185".
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Sep ’24
SF Symbols 6 app does not export 'Can Rotate' property of a layer
The SF Symbols app 6.0 (99) does not export the ‘Can Rotate’ property of layers when exporting a symbol via File > Export Symbol. Without this, all the new fantastic edit functions in the app related to rotating in SF Symbols is completely useless. This issue with the SF Symbols 6 app can be reproduced by exporting a rotatable symbol like fan.desk, and then by importing the result as custom symbol. When inspecting ‘Group 1’ of the imported symbol, it is no longer marked as rotatable. SF Symbols app 6.0 is still in beta, but hasn't been updated since 10 June. Hopefully this bug will be solved in the release version, or earlier. Does anyone know how to manually add the missing rotation info to the exported SVG file? In case an Apple engineer reads this: FB13916635
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571
Jul ’24
Critical Rendering Bug in PencilKit on iPad with "More Space" Display Mode & Apple Pencil Hover Interaction
There is a significant rendering issue in PencilKit when using an iPad set to "More Space" display mode, combined with an Apple Pencil that supports hover functionality (e.g., Apple Pencil 2). This problem affects all applications that use PencilKit, including Apple's own Notes and Quick Note. The issue results in flickering black borders and subtle jittering while drawing, which is especially noticeable during tasks requiring precise handwriting, such as writing mathematical expressions. Due to the short strokes and frequent lifts and drops of the pencil, the jitter is much more pronounced, leading to visual discomfort and even dizziness after extended use. Steps to Reproduce: Open Settings on your iPad. Navigate to Display & Brightness > Display Zoom > More Space. Switch to the More Space display mode. Open the Notes app or trigger Quick Note from any application by swiping from the bottom-right corner. Start drawing or writing using the Apple Pencil (with hover functionality) in the writing area. Observe the display anomalies as you hover and write: Flickering black borders appear intermittently around the writing area. The strokes show subtle jittering whenever you lift and lower the pencil. This is particularly disruptive when writing short, precise strokes, such as those in mathematical expressions, where the frequent up-and-down motion makes the jitter more apparent. Expected Results: Smooth and stable drawing experience with no visual artifacts or jittering during interactions with the Apple Pencil, regardless of the display zoom settings. Actual Results: Flickering black borders intermittently appear during drawing. Jittering of strokes is noticeable, particularly when lifting and lowering the Apple Pencil for short strokes. This disrupts precise writing tasks, especially in cases like mathematical notation, where frequent pen lifts and short strokes make the jitter much more apparent. This can lead to discomfort (e.g., dizziness) after extended use. System-Wide Impact: This issue affects all apps that utilize PencilKit, including third-party apps such as Doodle Draw (link). Since PencilKit is a core framework, the rendering bug significantly degrades the user experience across multiple productivity and note-taking applications. Similar Reports: There are numerous discussions about this issue online, indicating that many users are experiencing the same problem. Reddit Discussion: https://www.reddit.com/r/ipad/comments/1f042ol/comment/ljvilv6/ Apple Support Thread Additionally, a feedback report (ID: FB15166022) related to this issue with Notes has been previously filed, but the bug remains unresolved. This bug severely impacts the usability of PencilKit-enabled apps, especially during tasks that involve frequent, precise pencil strokes, such as writing mathematical expressions. We kindly request the development team investigate this issue promptly to ensure a smooth, stable experience with the iPad's "More Space" display mode and Apple Pencil hover interaction.
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456
Sep ’24
Core Data: Behavior of newBackgroundContext() and Parent-Child Relationships
Hi everyone, I’m wondering about Core Data. When creating a private context using newBackgroundContext(), does it automatically set the parent to the view context, or is it independent? Additionally, if I update objects in the context created by newBackgroundContext(), will the view context automatically notice the changes, and vice versa? Lastly, are there other ways to set parent-child context relationships between contexts? I'd appreciate it if anyone could clarify this for me. Thanks in advance! 😊
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364
Sep ’24
ControlWidget Can't use onOpenURL
`struct OpenMainAppIntent: AppIntent { static let title: LocalizedStringResource = "OpenMainAppIntent" static var openAppWhenRun: Bool = true init() {} @MainActor func perform() async throws -> some IntentResult & OpensIntent { guard let url = URL(string: "myapp://open") else { throw OpenURLError.invalidURL } return .result(opensIntent: OpenURLIntent(url)) } } ` This is an action in my custom control widget, and i want to use this deeplink open my application and get the link's info, but it won't perform onOpenURL `@main struct TestControlWidgetApp: App { var body: some Scene { WindowGroup { ContentView() .onOpenURL { url in print("url: \(url)") } } } }`
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464
Aug ’24
(iOS 17 & 18) Using QLPreviewController in specific app, added text colour reverts to black on text edit
In the company that I work we have a huge app and we have implemented an image annotation feature using the QLPreviewController but there is a bug where even with an OOTB implementation of the QLPreviewController, when I add a text, change the colour of that text and then double click on the text to edit it, it reverts back to black. I tried the same implementation in a sample app but I couldn't reproduce the bug hence it is not a bug with the library but something with the app interacting with the library. I was wondering if anyone can provide any suggestion with what the reason may be, as sadly I cannot provide any code examples as that would break company code. From my research what I found strange is that when I double click the coloured text and it goes to black, then undo it its as if that was not a recorded event as the undo goes back to the step before the text was coloured meaning it replaces the colour changing event rather than recording it as a new event that can be undone. If any has any suggestion please help me as I am quite stuck. 🙏
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Sep ’24