Overview

I'm starting with the template code from Apple from: File > New Project > macOS app using Swift UI and Swift Data. Selection works fine if only adding items, but after deleting any selected item selection stops working for some rows. It seems like the UI and model get out of sync. After restarting the app, or simply launching a new window, it works again. Is this a known bug in Swift UI and is there a workaround? import SwiftUI import SwiftData struct ContentView: View { @Environment(\.modelContext) private var modelContext @Query private var items: [Item] var body: some View { NavigationSplitView { List { ForEach(items) { item in NavigationLink { Text("Item at \(item.timestamp, format: Date.FormatStyle(date: .numeric, time: .standard))") } label: { Text(item.timestamp, format: Date.FormatStyle(date: .numeric, time: .standard)) } } .onDelete(perform: deleteItems) } .navigationSplitViewColumnWidth(min: 180, ideal: 200) .toolbar { ToolbarItem { Button(action: addItem) { Label("Add Item", systemImage: "plus") } } } } detail: { Text("Select an item") } } private func addItem() { withAnimation { let newItem = Item(timestamp: Date()) modelContext.insert(newItem) } } private func deleteItems(offsets: IndexSet) { withAnimation { for index in offsets { modelContext.delete(items[index]) } } } }

Attempting to acquire the value of the 'kern.hostname' ctl from a kext by calling sysctlbyname() returns EPERM with no hostname returned. sysctlbyname() is aliased to kernel_sysctlbyname(): config/Libkern.exports:839:_sysctlbyname:_kernel_sysctlbyname Looking at the implementation of kernel_sysctlbyname(), EPERM is returned by sysctl_root(). Not sure how to correctly identify the point of failure. Alternately, calling sysctlbyname("hw.ncpu") does return the value set for the ctl. The kext was compiled with SYSCTL_DEF_ENABLED defined to have the relevant section of sys/sysctl.h enabled. bsd_hostname() is a private symbol which is inaccessible to my kext. % sysctl -n kern.hostname does return the host name, so the ctl must be set. Is it possible to get the name of a host from the context of my kext? Thanks.

We as a team of engineers work on an app intended to visualize medical images. The type of situations where the app is used involves time critical decision making for acute clinical conditions. Stability of the app and performance are of utmost importance and can directly help timely treatment action. The app we are developing uses multiple libraries and tools like vtk, webgl, opengl, webkit, gl-matrix etc. The problem specifically can be described as follows, it has been observed that when 3D volume is rendered in the app and we try to rotate the volume the rotation is slow, unresposive and laggy. Specifically, we have noticed that iOS 18.1 the volume rotation is much smoother as compared to latest iOS 18.2. Eariler, we have faced somewhat similar issue with iOS 17 but it got improved in iOS 18.1. This performance regression is affecting the user experience in our healthcare application. We have taken reference from the cornerstone.js code and you can reproduce the issue using the following example: https://www.cornerstonejs.org/live-examples/volumeviewport3d Steps to Reproduce: Load the above mentioned test example on an iPhone running version 18.2 using safari. Perform volume rendering using the provided dataset. Measure the time taken by volume for each rotate or drag action. Repeat the same steps on an iPhone running version 18.1 for comparison. Additional Information: Device Model Tested: iPhone12, iPhone13, iPhone14 iOS Version With Issue: 18.2 18.3(Beta) I would appreciate any insights or suggestions on how to address this performance regression. If additional information is needed, please let me know. Thank you.

I have a view that lets the user position and size a bunch of subviews. I use .frame() and .position() to accomplish this. Right now, if the user resizes the window, the views stay where they are, anchored to the top-left corner. What I'd like is for the views to scale as a whole with window, maintaining their relative position, and their aspect ratios. I can apply .scaleEffect(_:anchor:) to the containing view, and it scales them the way I want, but I'm not sure how to tie it to the window. My first thought is to use a GeometryReader, but I don't really know what the "original" size would have been in order to compute a scale factor. How else might I accomplish this?

In System Settings -> General -> Date & Time, there is an option called "Set time and date automatically". Is there a way to check whether it is enabled programmatically?

I have developed a mobile app using SwiftUI that supports GoogleMaps. Now I am in the process of building a CarPlay application. I assume CarPlay only supports Apple MapKit, as I could not find any way to integrate the Google Maps. Below are few queries, Could you please guide me on how I can obtain the user's current location on the CarPlay app launch? Is there a way CarPlay can get the details from the mobile app(not pretty sure as its using Google Maps)? If the user is logged out from the mobile app, what is the flow in CarPlay? Do we have any standard login page asking user to login to the mobile app first? Is there any UI asking the user to capture the location in CarPlay? This is my first CarPlay app. Kindly guide me to a document or so that covers these details. Thanks a ton!!

I am not able to use SwiftUI Preview Here is the report I get while trying to see the issue: Here is the report of the issue: And here is the call and code preview: import SwiftUI struct ContentView: View { var body: some View { VStack { Image(systemName: "globe") .imageScale(.large) .foregroundStyle(.tint) Text("Hello, world!") } .padding() } } #Preview { ContentView() } Please update.

How to find potential users for apps uploaded to the app store? How to promote, who can provide guidance, thank you!

I'm using the following code to store a Keychain item: SecAccessControlCreateWithFlags( kCFAllocatorDefault, kSecAttrAccessibleWhenUnlockedThisDeviceOnly, .biometryAny, &error ) One of my app users reported an issue: 1. The user navigated to his iPhone’s Face ID settings and click `Reset Face ID`. 2. Then, before he set new Face ID, he accidentally tapped the "Back" button and returned to the iPhone Settings page. 3. He later reopened the Face ID setup page and completed the process. 4. Upon returning to my app, the Keychain item secured by Face ID was no longer found. I understand that .biometryAny may cause Keychain items to become invalidated when biometric data is reset. However, the user’s scenario — where the setup was temporarily interrupted — seems to have caused the item to disappear. 1. Is there a way to detect and handle such interruptions to prevent the Keychain item from being lost? 2. How can I design a better experience to guide the user in recreating the Keychain item when this occurs?

Hello, We’re experiencing an issue in our app where a subset of users are being logged out automatically without any apparent reason. This is impacting both iOS 16 and iOS 17 users (though it’s hard to confirm if it’s platform-specific). Here’s a breakdown of the situation: Symptoms Some users report being logged out of the app randomly, even after remaining active. The issue doesn’t seem to affect all users—just a specific subset. Users are prompted to log in again, and once they do, the app behaves as expected until the issue recurs.

Bonjour, s'il vous plaît, pourquoi mon compte icloud ne peut pas s'inscrire au programme de développement Apple, je veux vraiment votre aide.

This question is about In-App Purchase. This is an inquiry from one of our customers. We have set up a free trial. This is your first time using the service, but you have stated that you have been charged. Document. https://developer.apple.com/documentation/appstorereceipts/is_trial_period 「You can use this value to determine whether the specific record is in a subscription trial period. If a previous subscription period in the receipt has the value "true" for either the is_trial_period or is_in_intro_offer_period keys, the user is not eligible for a free trial or introductory price within that subscription group.」 Our expectation is that is_trial_period is true. Receipt is not contain is_trial_period : true or is_in_intro_offer_period : true. Only one case has occurred. Other customers are no problem.

Hello, I checked following documentations. Vision | Apple Developer Documentation Discover Swift enhancements in the Vision framework - WWDC24 - Videos - Apple Developer I saw Vision Framework is available on visionOS. So I want to know that if it's possible using Vision Framework on visionOS for tracking human and animal body poses. Or are there some limits to use this on visionOS?

Hello. Recently, while studying alignmentGuide, I had questions about it behaving differently from the documentation when setting multiple alignment guides. For example, the document states that only the alignmentGuide modifier with a first parameter matching the container's alignment will function. Therefore, I thought that writing the Swift code below would result in the yellow color's center alignment being aligned with the HStack's bottom alignment. struct TestView: View { var body: some View { HStack(alignment: .bottom) { Color.yellow .frame(height: 50) .alignmentGuide(VerticalAlignment.center) { dim in dim[.top] } .alignmentGuide(VerticalAlignment.top) { dim in dim[.bottom] } .alignmentGuide(VerticalAlignment.bottom) { dim in dim[VerticalAlignment.center] } Text("Hello, world") } .border(.green) } } Expect However, in reality, I observed that the top of the yellow color aligns with the HStack's bottom alignment. From this, I inferred that the 3rd alignmentGuide is applied first, and this also causes the first alignmentGuide to work, which makes me curious about how this is possible. If I leave only the 3rd alignmentGuide, it behaves as I expected. Real Behavior Could anybody help me to figure it out this behavior? Thank you

/Library / Preferences / com.apple.networkd.plist If enable_unified_http is true, streaming video does not work. Does anyone know this? Why isn't anyone answering?

UIImaged imagNamed crash App Start Crashed

What evidence exists that it's safe to call nextDrawable() on CAMetalLayer off the main thread? I have seen developers claiming that it's OK, but the official docs are silent on the topic. Attempting to do so with Strict Concurrency Checking set to Complete complains that CAMetalLayer is not @Sendable. I want to call it off the main thread since there doesn't seem to be any way to prevent it from blocking the UI for up to a second. I have read hints and allegations that this won't happen if you avoid asking for too many drawables, but that doesn't seem to be true 100% of the time in my experience. Supposing it is allowed, I wonder how races are handled such as when the layer's size is changed on the main thread, or if the layer is removed from the layer hierarchy.

I have: an Automator workflow saved as an application "workflow.app" an Apple Script saved as an application "script.app" a PDF file residing on Desktop "test.pdf" How do I launch workflow.app and pass test.pdf as the input for workflow from inside script.app?

I have been digging through the docs and the developer videos, and I have noticed a mention to RealityView having som potential limitations with anchors and world tracking. However, I haven’t been able to locate my answers. Does anyone know (or point me to) if RealityView supports everything ARView does, and if not what are the difference? I was fooling around with RealityView today with a simple plane anchor, and the stability of that anchor didn’t seem to be as steady as I recall ARView being In the past on iPhone. I’m trying to determine if I should be rolling over into RealityView or stay with ARView on this little educational project. I would imagine the answer is to go RealityView, but I want to make sure I’m not setting myself up for failure based on any current limitations For anchors and world data.

Is it possible to change the default save dialog that appears when creating a document based MacOS app in SwiftUI? I have a basic FileDocument struct that gets called to a view using a DocumentGroup scene. struct MyFile: FileDocument { static let readableContentTypes: [UTType] = [.myFileType] static let writeableContentTypes: [UTType] = [.myFileType] var list: [String] init(configuration: ReadConfiguration) throws { let data = configuration.file.regularFileContents! let JSONDecoder = JSONDecoder() do { try list = JSONDecoder.decode([String].self, from: data) } catch { throw CocoaError(.fileReadCorruptFile) } } func fileWrapper(configuration: WriteConfiguration) throws -> FileWrapper { let JSONEncoder = JSONEncoder() JSONEncoder.outputFormatting = .prettyPrinted do { data = try JSONEncoder.encode(self.list) } catch { print(error.localizedDescription) throw CocoaError(.fileWriteUnknown) } return .init(regularFileWithContents: data) } } This gets called at the DocumentGroup DocumentGroup(newDocument: MyFile(), editor: { document in ContentView(document: document.$document) }) But when I save the file, I want the save dialog that appears to have something like a 'Tags' textField that can also store information about the file. Something similar to this: (https://i.sstatic.net/AJQ3YNb8.png) From what I can find, there isn't much information about this other than manually creating an NSSavePanel class and overriding the current save function