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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Updating Sequoia Beta on External Drive
For the last 2 version (18.2 beta 1 and 18.2. beta 2) I haven't been able to successfully update to either of them. I have been running Sequoia on an external drive for testing purposes and didn't have this problem with any of the 18.1 versions. I'm currently on 18.1 (public) and when I download the update for 18.2 beta 2, the update appears to run (takes about 30 mins), preparing update, the restarts. When the Mac restarts, it just boots straight back to 18.1 without having applied the update.
Topic: UI Frameworks SubTopic: General
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298
Nov ’24
Results with spotlight in Core Data is not all.
I'm using Core Data to save data. Then I wanna add spotlight support. self.spotlightDelegate = StorageSpotlightDelegate(forStoreWith: description, coordinator: container.persistentStoreCoordinator) let isSpotlightDisable = UserDefaults.standard.bool(forKey: "isSpotlightDisable") if !isSpotlightDisable { self.toggleSpotlightIndexing(enable: true) } public func toggleSpotlightIndexing(enable: Bool) { guard let spotlightDelegate = spotlightDelegate else { return } if enable { spotlightDelegate.startSpotlightIndexing() } else { spotlightDelegate.stopSpotlightIndexing() spotlightDelegate.deleteSpotlightIndex { error in if let error = error { print(error) } } } UserDefaults.standard.set(!enable, forKey: "isSpotlightDisable") } It works fine on an iOS15 device, but not work on iOS 17&18. On iOS 18 devices, I can search the data when the first time to added to Core Data. But if I stop spotlight indexing and restart again, the data is never be searched. How can I to solve this? And I noticed that the problem is also exists in another dictionary app.
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447
Nov ’24
Is it possible to generate nice PDF with gradient from SwiftUI view ?
I try to generate PDF from view. View is nice, there is a lot of transparency and many gradients (circular and linear). But if I use ImageRenderer in in a way that documentation suggest all transparency and gradients disappear. Is this bug or some feature? Is it way to generate vector graphic from view with transparency and gradients? PDF allows those features, so why not?
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616
Nov ’24
Main Thread blocked by synchronous property query (AVPlayer)
I want to play remote videos using an AVPlayer in my SwiftUI App. However, I can't fix the error: "Main thread blocked by synchronous property query on not-yet-loaded property (PreferredTransform) for HTTP(S) asset. This could have been a problem if this asset were being read from a slow network." My code looks like this atm: struct CustomVideoPlayer: UIViewControllerRepresentable { let myUrl: URL func makeCoordinator() -> Coordinator { return Coordinator(self) } func makeUIViewController(context: Context) -> AVPlayerViewController { let playerItem = AVPlayerItem(url: myUrl) let player = AVQueuePlayer(playerItem: playerItem) let playerViewController = AVPlayerViewController() playerViewController.player = player context.coordinator.setPlayerLooper(player: player, templateItem: playerItem) playerViewController.delegate = context.coordinator playerViewController.beginAppearanceTransition(true, animated: false) return playerViewController } func updateUIViewController(_ uiViewController: AVPlayerViewController, context: Context) { } static func dismantleUIViewController(_ uiViewController: AVPlayerViewController, coordinator: ()) { uiViewController.beginAppearanceTransition(false, animated: false) } class Coordinator: NSObject, AVPlayerViewControllerDelegate { var parent: CustomVideoPlayer var player: AVPlayer? = nil var playerLooper: AVPlayerLooper? = nil init(_ parent: CustomVideoPlayer) { self.parent = parent super.init() } func setPlayerLooper(player: AVQueuePlayer, templateItem: AVPlayerItem) { self.player = player playerLooper = AVPlayerLooper(player: player, templateItem: templateItem) } } } I already tried creating the AVPlayerItem/AVAsset on a background thread and I also tried loading the properties asynchronously before setting the player in makeUIViewController: let player = AVQueuePlayer(playerItem: nil) ... Task { let asset = AVAsset(url: myUrl) let _ = try await asset.load(.preferredTransform) let item = AVPlayerItem(asset: asset) player.replaceCurrentItem(with: item) } Nothing seems to fix the issue (btw: the main thread is actually blocked, there is a noticable animation hitch). Any help is much appreciated.
Topic: UI Frameworks SubTopic: General
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785
Nov ’24
[macOS sequoia] keyboard shortcut for standard deviation (sigma) symbol not working
I'm doing statistical formulas and need the keyboard shortcut of the symbol used to represent standard deviation (sigma), which should look like (σ). Everything online suggests using the keyboard shortcut for option + w, but when I use that shortcut I get, ∑ instead. I've tried searching OS settings and there doesn't seem to be a place to change or determine what is the proper keyboard shortcut. The keyboard shortcut for statistical mean (mu) is working, µ And greater than or equal to, ≥ And less than or equal to, ≤ are also working.
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912
Nov ’24
I want to report a Apple bug in call recording feature during facetime audio call
I am using iphone 11 with ios version 18.1 and I found one issue in call recording during FT audio call. Call gets dropped as soon as call recording start. This bug is also reproducible on iphone 14 pro max having same ios version. I tried it 5/5 times and it is 100% reproducible. Can you please help to fix this issue. This is really a serious quality concern as per apple standards.
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465
Nov ’24
MapKit - render a line above everything, including annotations
I have a map application that needs to show a line (representing a direct route) that is above everything, including annotations. This is important because the map has lots of annotations (possibly hundreds) and the line is representing a route from point to another. With that many annotations being on top the line / route is basically useless because you can't see it. I've looked at things like MKOverlayLevel but it only supports .aboveRoads or .aboveLabels. Is there a way to set the z-axis of a map overlay so that it truly is on top of everything else on the map, including annotations? And if not directly in MapKit, what other options might I have? Worth noting that I'm targeting 16.4 and above, so that's my limitation on this
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395
Nov ’24
Bring iOS app to foreground from Apple Watch app
Exploring Live Activity feature for Apple Watch right now and found that it has this default view with "Open on iPhone" button when you tap Live Activity. That button perfectly brings iOS app to foreground as if you tapped iOS's Live Activity. Is there a way to mimic that behavior from inside Watch app code? From inside WKApplicationDelegate, for example Tried openSystemURL but it seems lile it's only available for tel or sms links
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564
Nov ’24
XCUITest snapshot dictionary represenation giving wrong coordinates
Problem I am developing a WebDriver agent for automation and using dictionaryRepresentation to retrieve the coordinates of the iOS app hierarchy. However, I am encountering an issue with the accuracy of the x and y coordinates. Approach Tried I tested the setup on: iPhone 12 Pro Max (iOS 16.2): Accuracy issues with the coordinates were observed. iPhone SE (3rd Generation) (iOS 16.2): Coordinates were accurate for tap actions, with no issues identified. Observation It appears that devices with fingerprint biometric authentication provide accurate coordinates. Can anyone help here to understand is there anything wrong in the code. Are do we have to adjust frame of the element for different devices? Sample Code - (NSDictionary *)json_tree { NSDictionary<XCUIElementAttributeName, id> *dictionaryRepresentation = [[self snapshotWithError:nil] dictionaryRepresentation]; return [self.class dictionaryForElementAttributes:dictionaryRepresentation recursive:YES]; } // This method converts the dictionary to CGRect, handling any broken frame values (e.g., Infinity) + (CGRect)handleBrokenFrameFromDict:(id)frameDict { if ([frameDict isKindOfClass:[NSDictionary class]]) { CGFloat originX = [frameDict[@"X"] floatValue]; CGFloat originY = [frameDict[@"Y"] floatValue]; CGFloat sizeWidth = [frameDict[@"Width"] floatValue]; CGFloat sizeHeight = [frameDict[@"Height"] floatValue]; CGRect frame = CGRectMake(originX, originY, sizeWidth, sizeHeight); // Replace Infinity values with CGRectZero return (isinf(frame.size.width) || isinf(frame.size.height) || isinf(frame.origin.x) || isinf(frame.origin.y)) ? CGRectZero // or another predefined constant like BROKEN_RECT : CGRectIntegral(frame); } return CGRectZero; // If frameDict is not a valid dictionary, return CGRectZero } // This method converts CGRect into a dictionary representation for "rect" + (NSDictionary *)rectDictionaryFromCGRect:(CGRect)rect { return @{ @"x": @(rect.origin.x), @"y": @(rect.origin.y), @"width": @(rect.size.width), @"height": @(rect.size.height) }; } + (NSString *)label:(NSDictionary<XCUIElementAttributeName, id> *)dict { XCUIElementType elementType = [dict[XCUIElementAttributeNameElementType] intValue]; NSString *label = dict[XCUIElementAttributeNameLabel]; if (elementType == XCUIElementTypeTextField || elementType == XCUIElementTypeSecureTextField) { return label; } return FBTransferEmptyStringToNil(label); } + (NSString *)name:(NSDictionary<XCUIElementAttributeName, id> *)dict { NSString *identifier = dict[XCUIElementAttributeNameIdentifier]; if (nil != identifier && identifier.length != 0) { return identifier; } NSString *label = dict[XCUIElementAttributeNameLabel]; return FBTransferEmptyStringToNil(label); } + (NSString *)value:(NSDictionary<XCUIElementAttributeName, id> *)dict { id value = dict[XCUIElementAttributeNameValue]; XCUIElementType elementType = [dict[XCUIElementAttributeNameElementType] intValue]; if (elementType == XCUIElementTypeStaticText) { NSString *label = [self label:dict]; value = FBFirstNonEmptyValue(value, label); } else if (elementType == XCUIElementTypeButton) { NSNumber *isSelected = [dict[XCUIElementAttributeNameSelected] boolValue] ? @YES : nil; value = FBFirstNonEmptyValue(value, isSelected); } else if (elementType == XCUIElementTypeSwitch) { value = @([value boolValue]); } else if (elementType == XCUIElementTypeTextView || elementType == XCUIElementTypeTextField || elementType == XCUIElementTypeSecureTextField) { NSString *placeholderValue = dict[XCUIElementAttributeNamePlaceholderValue]; value = FBFirstNonEmptyValue(value, placeholderValue); } value = FBTransferEmptyStringToNil(value); if (value) { value = [NSString stringWithFormat:@"%@", value]; } return value; } + (NSDictionary *)dictionaryForElementAttributes:(NSDictionary<XCUIElementAttributeName, id> *)dict recursive:(BOOL)recursive { NSMutableDictionary *info = [[NSMutableDictionary alloc] init]; info[@"type"] = [FBElementTypeTransformer shortStringWithElementType:[dict[XCUIElementAttributeNameElementType] intValue]]; info[@"rawIdentifier"] = FBValueOrNull([dict[XCUIElementAttributeNameIdentifier] isEqual:@""] ? nil : dict[XCUIElementAttributeNameIdentifier]); info[@"name"] = FBValueOrNull([self name:dict]); info[@"value"] = FBValueOrNull([self value:dict]); info[@"label"] = FBValueOrNull([self label:dict]); // Handle the frame value CGRect frame = [self handleBrokenFrameFromDict:dict[XCUIElementAttributeNameFrame]]; info[@"frame"] = NSStringFromCGRect(frame); // Add the rect value info[@"rect"] = [self rectDictionaryFromCGRect:frame]; info[@"isEnabled"] = [@([dict[XCUIElementAttributeNameEnabled] boolValue]) stringValue]; // visible // accessible info[@"isFocused"] = [@([dict[XCUIElementAttributeNameHasFocus] boolValue]) stringValue]; if (!recursive) { return info.copy; } NSArray<NSDictionary<XCUIElementAttributeName, id> *> *childElements = [dict[XCUIElementAttributeNameChildren] isKindOfClass:[NSArray class]] ? dict[XCUIElementAttributeNameChildren] : @[]; if ([childElements count]) { info[@"children"] = [[NSMutableArray alloc] init]; for (NSDictionary<XCUIElementAttributeName, id> * childSnapshot in childElements) { [info[@"children"] addObject:[self dictionaryForElementAttributes:childSnapshot recursive:YES]]; } } return info; }
Topic: UI Frameworks SubTopic: General
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301
Nov ’24
QLPreviewController freezes when playing Videos
In my iOS App I present a QLPreviewController where I want to display a locally stored Video from the iPhone's document directory. let previewController = QLPreviewController() previewController.dataSource = self self.present(previewController, animated: true, completion: nil) func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem { let url = urlForPreview return url! as QLPreviewItem } This seems to work fine for all but one of my testflight users. He is using an iPhone 12 with iOS18.0.1. The screen becomes unresponsive. He cannot pause the video, share it or close the QLPreviewController. In his logfile I see the following error... [AVAssetTrack loadValuesAsynchronouslyForKeys:completionHandler:] invoked with unrecognized keys ( "currentVideoTrack.preferredTransform") Any ideas?.
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356
Nov ’24
iOS 18 Icon Display Inconsistency After App Update
Hello Apple Developer Community, I am encountering an issue with app icon rendering after updating an app on devices running iOS 18 or newer. Below are the details: Issue Summary: When updating an app from a previous version (with separate light and dark mode icons) to the latest version (where both modes use the same icon), the icon changes are not reflected consistently across all system menus. Steps to Reproduce: Set the device mode to Dark Mode. Install the previous app version (with different icons for light and dark modes). Update the app to the latest version (where both modes use the same icon). Change the device mode to Light Mode. Switch back to Dark Mode. Expected Behavior: The app icon should remain consistent across all system menus (Home Screen, Spotlight search, etc.) when switching between Light and Dark Modes. Observed Behavior: The app icon displays correctly on the Home Screen but inconsistencies appear in other menus, such as Spotlight search or when toggling between modes. For instance, in Dark Mode, the icon may revert to the previous black-colored logo or display incorrectly compared to the updated design. Additional Notes: The asset catalog is configured correctly, with identical icons set for both light and dark modes in the latest app version. Incrementing the build number was implemented during the update. A manual device restart resolves the issue on some devices, but not consistently. Questions for the Community: Has anyone else experienced similar app icon caching or rendering issues in iOS 18 or later? Are there known workarounds or specific configurations to ensure consistent icon rendering across all system menus? Could this be related to iOS 18's icon caching or appearance handling mechanisms? Your insights and suggestions would be greatly appreciated. Thank you for your time!
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639
Nov ’24
Relationship between CABasicAnimation's KeyPath and a CALayer's action event
I have a CALayer and I'd like to animate a property on it. But, the property that triggers the animation change is different to the one that is being changed. A basic example of what I'm trying to do is below. I'm trying to create an animation on count by changing triggerProperty. This example is simplified (in my project, the triggerProperty is not an Int, but a more complex non-animatable type. So, I'm trying to animate it by creating animations for some of it's properties that can be matched to CABasicAnimation - and rendering a version of that class based on the interpolated values). @objc class AnimatableLayer: CALayer { @NSManaged var triggerProperty: Int @NSManaged var count: Int override init() { super.init() triggerProperty = 1 setNeedsDisplay() } override init(layer: Any) { super.init(layer: layer) } required init?(coder: NSCoder) { fatalError("init(coder:) has not been implemented") } override class func needsDisplay(forKey key: String) -> Bool { return key == String(keypath: \AnimatableLayer.triggerProperty) || super.needsDisplay(forKey: key) } override func action(forKey event: String) -> (any CAAction)? { if event == String(keypath: \AnimatableLayer.triggerProperty) { if let presentation = self.presentation() { let keyPath = String(keypath: \AnimatableLayer.count) let animation = CABasicAnimation(keyPath: keyPath) animation.duration = 2.0 animation.timingFunction = CAMediaTimingFunction(name: CAMediaTimingFunctionName.linear) animation.fromValue = presentation.count animation.toValue = 10 return animation } } return super.action(forKey: event) } override func draw(in ctx: CGContext) { print("draw") NSGraphicsContext.saveGraphicsState() let nsctx = NSGraphicsContext(cgContext: ctx, flipped: true) // create NSGraphicsContext NSGraphicsContext.current = nsctx // set current context let renderText = NSAttributedString(string: "\(self.presentation()?.count ?? self.count)", attributes: [.font: NSFont.systemFont(ofSize: 30)]) renderText.draw(in: bounds) NSGraphicsContext.restoreGraphicsState() } func animate() { print("animate") self.triggerProperty = 10 } } With this code, the animation isn't triggered. It seems to get triggered only if the animation's keypath matches the one on the event (in the action func). Is it possible to do something like this?
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501
Nov ’24
iOS 18 MapKit discrepancy between physical devices and simulators
I have noticed a discrepancy between behavior on physical devices and simulators in iOS 18. I am using the latest MapKit APIs to fetch MKMapItems using the following MKLocalSearch: private func performLocalSearch(_ query: String) async throws -> [MKMapItem] { let request = MKLocalSearch.Request() request.naturalLanguageQuery = query let search = MKLocalSearch(request: request) return try await search.start().mapItems } This returns an array of MKMapItem on both the simulator and physical device. The key difference is my physical device (iOS 18.1.1) is missing the MKMapItem's identifier value. On the simulator, identifier is always populated in addition to my search. Any ideas on how to resolve this? The new MapKit API for those curious: @available(iOS 6.0, *) open class MKMapItem : NSObject { @available(iOS 18.0, *) open var identifier: MKMapItem.Identifier? { get }
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471
Nov ’24
Compatibility Issues with Ext JS 4.0 and Sencha Touch 2.0 in iOS 18.2 Beta – Legacy JavaScript Support and Rendering Problems
Hello, I am encountering compatibility issues with older JavaScript frameworks, specifically Ext JS 4.0 and Sencha Touch 2.0, after upgrading to iOS 18.2 Beta. My application, which was working fine on previous versions of iOS, is now experiencing rendering issues, broken touch events, and performance degradation on WebKit in iOS 18.2. The issues I’m seeing include: Sencha Touch 2.0: The UI elements (like fields, and lists) are not interactive or showing their content properly. There also seems to be a delay in rendering touch events. This seem to no longer work as expected with the updated WebKit engine in iOS 18.2 Beta. My Questions: Are there any known issues with legacy JavaScript frameworks like Ext JS 4.0 and Sencha Touch 2.0 on iOS 18.2 Beta? Specifically, do these frameworks rely on older DOM methods or JavaScript features that might be deprecated in the latest WebKit engine? Has Apple officially deprecated any JavaScript features or DOM methods in WebKit that might be causing these issues? If so, are there recommended workarounds or updates to ensure compatibility with iOS 18.2? Is there a way to enable legacy JavaScript features or fallback modes in iOS 18.2 ? I would appreciate any guidance on this, as we are facing significant issues with our app’s performance and UI since upgrading to iOS 18.2. Thank you!
Topic: UI Frameworks SubTopic: General
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1.3k
Dec ’24
App Shortcuts: Invalid parameter type. AppEntity and AppEnum are the only allowed types...
Hi! So while Date is supported for @Parameter in an App Intent, I just discovered that Xcode will not let me use use it in a parametrized App Shortcut phrase. In my case, I would like to give the option to say "today", tomorrow", or "day after tomorrow" for the date. Am I missing something? Any hints on the best way to approach this?
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803
Dec ’24
Focused element for mail/notes app
I want to get the content present in a note or a mail thread when my cursor is in it on macos. (In the focused element). But I don't succeed to get any element from both mail and notes using : let result = AXUIElementCopyAttributeValue(appRef, kAXFocusedUIElementAttribute as CFString, &focusedElement) Even when I want to check the available attribute : let result = AXUIElementCopyAttributeNames(element, &attributeNames) I got AXUIElementCopyAttributeNames result: AXError(rawValue: -25204) But I have the write permission because when I am running AXIsProcessTrusted() to see if I got accessible permission it don't throw an error Is it possible to do it that way or I have to change
Topic: UI Frameworks SubTopic: General Tags:
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281
Dec ’24
How to save/share an iOS system screenshot to the active app?
I have my app accepting images shared from Photos but from the screenshot editor, my app icon does not show as a destination for the screenshot. Do I have to build an app extension or app intent catcher to then pass along the screenshot? It the problem that the screenshot editor is a modal sheet holding my app interface. I want to catch the screenshot in background for processing.
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Dec ’24
Cannot lauch Share Extension from Photos
I am encountering an issue where the Share Extension in my app fails to launch intermittently. In my project, NSExtensionPrincipalClass is set to ComposeShellVC. When the Share Extension launches successfully, the following log entry appears, indicating that ComposeShellVC is being created: 09:21:09.339190+0800 2254529 ViewServices com.apple.UIKit compose-shareextension Received request to create view controller: self: <_UIViewServiceViewControllerOperator: 0x109194c00>; class: compose_shareextension.ComposeShellVC; contextToken: 42EA1BDB-5CDF-4EBD-8503-8A9A04BCE41C However, when the bug happens, this entry is absent during the failed launches. Additionally, I am unable to set breakpoints within the Share Extension to further investigate. Could you provide guidance on the next steps to diagnose this issue? Any advice on debugging techniques or tools that can help pinpoint the cause of this behavior would be greatly appreciated.
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Dec ’24