Considering below dummy codes: @MainActor var globalNumber = 0 @MainActor func increase(_ number: inout Int) async { // some async code excluded number += 1 } class Dummy: @unchecked Sendable { @MainActor var number: Int { get { globalNumber } set { globalNumber = newValue } } @MainActor func change() async { await increase(&number) //Actor-isolated property 'number' cannot be passed 'inout' to 'async' function call } } I'm not really trying to make an increasing function like that, this is just an example to make everything happen. As for why number is a computed property, this is to trigger the actor-isolated condition (otherwise, if the property is stored and is a value type, this condition will not be triggered). Under these conditions, in function change(), I got the error: Actor-isolated property 'number' cannot be passed 'inout' to 'async' function call. My question is: Why Actor-isolated property cannot be passed 'inout' to 'async' function call? What is the purpose of this design? If this were allowed, what problems might it cause?

I ran into a problem, I have a recursive function in which Data type objects are temporarily created, because of this, the memory expands until the entire recursion ends. It would just be fixed using autoreleasepool, but it can't be used with async await, and I really don't want to rewrite the code for callbacks. Is there any option to use autoreleasepool with async await functions? (I Googled one option, that the Task already contains its own autoreleasepool, and if you do something like that, it should work, but it doesn't, the memory is still growing) func autoreleasepool<Result>(_ perform: @escaping () async throws -> Result) async throws -> Result { try await Task { try await perform() }.value }

Hi, I'm relatively new to iOS development and kindly ask for some feedback on a strategy to achieve this desired behavior in my app. My Question: What would be the best strategy for sound effect playback when an app is in the background with precise timing? Is this even possible? Context: I created a basic countdown timer app (targeting iOS 17 with Swift/SwiftUI.). Countdown sessions can last up to 30-60 mins. When the timer is started it progresses through a series of sub-intervals and plays a short sound for each one. I used AVAudioPlayer and everything works fine when the app is in the foreground. I'm considering switching to AVAudioEngine b/c precise timing is very important and the AIs tell me this would have better precision. I'm already setting "App plays audio or streams audio/video using AirPlay" in my Plist, and have configured: AVAudioSession.sharedInstance().setCategory(.playback, mode: .default, options: .mixWithOthers) Curiously, when testing on my iPhone 13 mini, sounds sometimes still play when the app is in the background, but not always. What I've considered: Background Tasks: Would they make any sense for this use-case? Seems like not if the allowed time is short & limited by the system. Pre-scheduling all Sounds: Not sure this would even work and seems like a lot of memory would be needed (could be hundreds of intervals). ActivityKit Alerts: works but with a ~50ms delay which is too long for my purposes. Pre-Render all SFX to 1 large audio file: Seems like a lot of work and processing time and probably not worth it. I hope there's a better solution. I'd really appreciate any feedback.

Hello, I have an issue with importing some .mp3 files into a swift playground project (in Xcode, not in the Playground app). They worked fine in the Xcode project, but for some reason playgrounds isn't able to find them. I imported them the exact same way as I did in the Xcode project.

func textField( _ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String ) -> Bool { if let delegate = delegate, let shouldChangeCharactersIn = delegate.textField { return shouldChangeCharactersIn(textField, range, string) } return true } This is from an extension extension TextInput: UITextFieldDelegate, ObservableTextFieldDelegateProtocol { The delegate is already a UITextFieldDelegate, but when you click on the error, it returns 7 instances of: "Found this candidate in module 'UIKit' (UIKit.UITextFieldDelegate.textField)" This doesn't give an error in Xcode 16. Is this an Xcode 26 bug?

I'm trying to fix some Swift6 warnings, this one seems too strict, I'm not sure how to fix it. The variable path is a String, which should be immutable, it's a local variable and never used again inside of the function, but still Swift6 complains about it being a race condition, passing it to the task What should I do here to fix the warning?

I'm primarily an AppleScript writer and only a novice programmer, using ChatGPT to help me with the legwork. It has helped me to write a functioning app that builds a menu structure based on the scripts I have in the Scripts directory used in the script menu and then runs the applescripts. When I distribute the app to my desktop and run it, the scripts that access other apps, like InDesign will cause it to launch, but not actually do anything. I included the ids for each app in the entitlements dictionary and have given the app full disk access in system settings, but it's not functioning as I'd expect. I know there are apps like Alfred that allow you to run scripts from a keystroke, but I'm building this for others I work with so they can also access info about each script, what it does, and how to use it from the menu, as well as key commands to run them. Not sure what else to say, but if this sounds like a simple fix to anyone, please let me know.

Hello, I have a problem with Xcode, in C++ language. When I create a new project, I put my program in a file and click Build. It works correctly and without any problems, but when I enter a second file in the same project and click build, it says build failed. In the log it says, duplicate symbols appear.

iOS18.2 / iPhone16 pro / xcode16.2 'traitCollectionDidChange' This function has been deprecated in iOS17. However, when I debugged it, I confirmed that it is not called on iOS17, but it is called on iOS18.2. What is the reason?

Issue: During app execution, the intended method is not being called; instead, the method preceding (written above the intended method) is being executed. For Example: //In my case the ViewController class is at 3rd level of inheritance. class ViewController: UIViewController { func methodA() { print("methodA") } func methodB() { print("methodB") } } let vc = ViewController() vc.methodB() Output: //"methodA" Expected: //"methodB" Observations: Recent code changes have revealed that enabling the below Swift-6 flag leads to this linking issue. When this flag is commented out, the problem disappears. .enableUpcomingFeature("InternalImportsByDefault") Additionally, moving the intended method into an extension of the same class resolves the issue when the flag is enabled. Conclusion: To resolve the issue: Comment out the Swift-6 flag. Alternatively, move the method into an extension of the same class, which addresses the issue for this specific case. I had similar issue in other class where it crashes with message "method not found", but actually the method is there. When moving the method into an extension of same class resolve this issue. Any help is much appreciated. Thanking you..

I'm using xcode 16.1 withSwift. I want to know how to call a function passing in an array. Also I need to know how to declare the function receiving the array. I currently have: func myfunc(costa: [Double]) { } I call it like this: myfunc(costa:[ ]) It's an array of Doubles. I don't get any errors but the array is always empty. Please help. Thank you.

var testTwo: Double = 0 testDouble = 80 testTwo = 200 var testThree: Int = 0 testThree = Int(testTwo/testDouble) var testDate: Date = .now var dateComponent = DateComponents() dateComponent.day = testThree var newDate: Date = Calendar.current.date(byAdding: dateComponentwith a thread error , to: testDate)! This code works in a playground. However, when I try to use it in Xcode for my app it fails with the following error: Thread 1: Fatal error: Double value cannot be converted to Int because it is either infinite or NaN I printed the value being converted to Int and it was not NAN or infinite.

I am using CHCSVParser in objective-c to use the CSVString extension of the Array instance method. When I installed a new app on iOS18.1.1, the correct value (@"Application,"abc,def"") was returned for both the first and second turns, but when I installed a new app on iOS18.2, the correct value was returned for the first turn, but @"" was returned for the second turn. Even when I debug with step into, I can enter the CSVString for the first turn, but I cannot enter it for the second turn and after. It's as if the instance method is not being generated. There are in-app purchases between the first and second turns, but the view controllers that are called are also the same. Is there any change between iOS18.1.1 and iOS18.2? [Code] NSArray *application = [NSArray arrayWithObjects:KEY_APPLICATION, @"abc,def", nil]; NSString *applistring = [application CSVString]; NSString *appliStr = [application CSVString]; [Debug window 18.1.1 First] application __NSArrayI * @"2 elements" 0x0000000302118c00 [0] __NSCFConstantString * @"Application" 0x00000001005deab8 [1] __NSCFConstantString * @"abc,def" 0x00000001005deb78 applistring __NSCFString * @"Application,"abc,def"" 0x0000000302f7d050 appliStr __NSCFString * @"Application,"abc,def"" 0x0000000302f706f0 [18.1.1 Second] application __NSArrayI * @"2 elements" 0x00000003021b5200 [0] __NSCFConstantString * @"Application" 0x00000001005deab8 [1] __NSCFConstantString * @"abc,def" 0x00000001005deb78 applistring __NSCFString * @"Application,"abc,def"" 0x0000000302ff6dc0 appliStr __NSCFString * @"Application,"abc,def"" 0x0000000302fa4d20 [18.2 First] sapplication __NSArrayI * @"2 elements" 0x00000003019d7e80 [0] __NSCFConstantString * @"Application" 0x00000001041c6ab8 [1] __NSCFConstantString * @"abc,def" 0x00000001041c6b78 applistring __NSCFString * @"Application,"abc,def"" 0x000000030179e430 appliStr __NSCFString * @"Application,"abc,def"" 0x000000030179e5e0 [18.2 Second] application __NSArrayI * @"2 elements" 0x00000003019679a0 [0] __NSCFConstantString * @"Application" 0x00000001041c6ab8 [1] __NSCFConstantString * @"abc,def" 0x00000001041c6b78 applistring __NSCFConstantString * @"" 0x00000001efa04768 appliStr __NSCFConstantString * @"" 0x00000001efa04768

Crashed: com.apple.root.user-initiated-qos.cooperative 0 libswift_Concurrency.dylib 0x67f40 swift_task_create_commonImpl(unsigned long, swift::TaskOptionRecord*, swift::TargetMetadataswift::InProcess const*, void (swift::AsyncContext* swift_async_context) swiftasynccall*, void*, unsigned long) + 528 1 libswift_Concurrency.dylib 0x64d78 swift_asyncLet_begin + 40 2 AAAA 0x47aef28 (1) suspend resume partial function for ActivityContextModule.fetchRecord(startDate:endDate:) + 50786796 3 libswift_Concurrency.dylib 0x60f5c swift::runJobInEstablishedExecutorContext(swift::Job*) + 252 4 libswift_Concurrency.dylib 0x62514 swift_job_runImpl(swift::Job*, swift::SerialExecutorRef) + 144 5 libdispatch.dylib 0x15ec0 _dispatch_root_queue_drain + 392 6 libdispatch.dylib 0x166c4 _dispatch_worker_thread2 + 156 7 libsystem_pthread.dylib 0x3644 _pthread_wqthread + 228 8 libsystem_pthread.dylib 0x1474 start_wqthread + 8

System provides AnyShape type erasure that animates correctly. But system doesn't provide AnyInsettableShape. Here is my implementation of AnyInsettableShape (and AnyAnimatableData that is needed to support animation). Let me know if there is simpler solution. struct AnyInsettableShape: InsettableShape { private let _path: (CGRect) -> Path private let _inset: (CGFloat) -> AnyInsettableShape private let _getAnimatableData: () -> AnyAnimatableData private let _setAnimatableData: (_ data: AnyAnimatableData) -> AnyInsettableShape init<S>(_ shape: S) where S : InsettableShape { _path = { shape.path(in: $0) } _inset = { AnyInsettableShape(shape.inset(by: $0)) } _getAnimatableData = { AnyAnimatableData(shape.animatableData) } _setAnimatableData = { data in guard let otherData = data.rawValue as? S.AnimatableData else { assertionFailure(); return AnyInsettableShape(shape) } var shape = shape shape.animatableData = otherData return AnyInsettableShape(shape) } } var animatableData: AnyAnimatableData { get { _getAnimatableData() } set { self = _setAnimatableData(newValue) } } func path(in rect: CGRect) -> Path { _path(rect) } func inset(by amount: CGFloat) -> some InsettableShape { _inset(amount) } } struct AnyAnimatableData : VectorArithmetic { init<T : VectorArithmetic>(_ value: T) { self.init(optional: value) } private init<T : VectorArithmetic>(optional value: T?) { rawValue = value _scaleBy = { factor in (value != nil) ? AnyAnimatableData(value!.scaled(by: factor)) : .zero } _add = { other in AnyAnimatableData(value! + (other.rawValue as! T)) } _subtract = { other in AnyAnimatableData(value! - (other.rawValue as! T)) } _equal = { other in value! == (other.rawValue as! T) } _magnitudeSquared = { (value != nil) ? value!.magnitudeSquared : .zero } _zero = { AnyAnimatableData(T.zero) } } fileprivate let rawValue: (any VectorArithmetic)? private let _scaleBy: (_: Double) -> AnyAnimatableData private let _add: (_ other: AnyAnimatableData) -> AnyAnimatableData private let _subtract: (_ other: AnyAnimatableData) -> AnyAnimatableData private let _equal: (_ other: AnyAnimatableData) -> Bool private let _magnitudeSquared: () -> Double private let _zero: () -> AnyAnimatableData mutating func scale(by rhs: Double) { self = _scaleBy(rhs) } var magnitudeSquared: Double { _magnitudeSquared() } static let zero = AnyAnimatableData(optional: nil as Double?) @inline(__always) private var isZero: Bool { rawValue == nil } static func + (lhs: AnyAnimatableData, rhs: AnyAnimatableData) -> AnyAnimatableData { guard let (lhs, rhs) = fillZeroTypes(lhs, rhs) else { return .zero } return lhs._add(rhs) } static func - (lhs: AnyAnimatableData, rhs: AnyAnimatableData) -> AnyAnimatableData { guard let (lhs, rhs) = fillZeroTypes(lhs, rhs) else { return .zero } return lhs._subtract(rhs) } static func == (lhs: AnyAnimatableData, rhs: AnyAnimatableData) -> Bool { guard let (lhs, rhs) = fillZeroTypes(lhs, rhs) else { return true } return lhs._equal(rhs) } @inline(__always) private static func fillZeroTypes(_ lhs: AnyAnimatableData, _ rhs: AnyAnimatableData) -> (AnyAnimatableData, AnyAnimatableData)? { switch (!lhs.isZero, !rhs.isZero) { case (true, true): (lhs, rhs) case (true, false): (lhs, lhs._zero()) case (false, true): (rhs._zero(), rhs) case (false, false): nil } } }

These helper methods allow to use modifier methods in standard for SwiftUI short way. extension View { @inline(__always) func modify(_ block: (_ view: Self) -> some View) -> some View { block(self) } @inline(__always) func modify<V : View, T>(_ block: (_ view: Self, _ data: T) -> V, with data: T) -> V { block(self, data) } } _ DISCUSSION Suppose you have modifier methods: func addBorder(view: some View) -> some View { view.padding().border(Color.red, width: borderWidth) } func highlight(view: some View, color: Color) -> some View { view.border(Color.red, width: borderWidth).overlay { color.opacity(0.3) } } _ Ordinar Decision Your code may be like this: var body: some View { let image = Image(systemName: "globe") let borderedImage = addBorder(view: image) let highlightedImage = highlight(view: borderedImage, color: .red) let text = Text("Some Text") let borderedText = addBorder(view: text) let highlightedText = highlight(view: borderedText, color: .yellow) VStack { highlightedImage highlightedText } } This code doesn't look like standard SwiftUI code. _ Better Decision Described above helper methods modify(:) and modify(:,with:) allow to write code in typical for SwiftUI short way: var body: some View { VStack { Image(systemName: "globe") .modify(addBorder) .modify(highlight, with: .red) Text("Some Text") .modify(addBorder) .modify(highlight, with: .yellow) } }

Does SwiftUI now support the ability for a chart to have two different Y Axes? ChaptGPT seems to think it does, but I keep getting compiler errors in XCode.

I'm working on a cross-platform C# application that converts HTML content to PDF. The goal is to render dynamic HTML pages (including CSS and JavaScript) as high-quality, printable PDF files. Additionally, I need to support features like adding headers/footers, securing PDFs with passwords, and controlling user permissions. While everything works well on Windows, I need some help rendering consistency and handling permissions on MacOS.

Given the below code with Swift 6 language mode, Xcode 16.2 If running with iOS 18+: the app crashes due to _dispatch_assert_queue_fail If running with iOS 17 and below: there is a warning: warning: data race detected: @MainActor function at Swift6Playground/PublishedValuesView.swift:12 was not called on the main thread Could anyone please help explain what's wrong here? import SwiftUI import Combine @MainActor class PublishedValuesViewModel: ObservableObject { @Published var count = 0 @Published var content: String = "NA" private var cancellables: Set<AnyCancellable> = [] func start() async { let publisher = $count .map { String(describing: $0) } .removeDuplicates() for await value in publisher.values { content = value } } } struct PublishedValuesView: View { @ObservedObject var viewModel: PublishedValuesViewModel var body: some View { Text("Published Values: \(viewModel.content)") .task { await viewModel.start() } } }

Hi, I'm struggling to understand using Swift-C++ in the same project. I have an existing code-base that makes heavy use of Swift-Objective-C interoperability. We make use of swift classes in our project. When I enable swift-objective c interoperability I am running into numerous build errors in the generated bridging header. I'm trying to understand why these errors exist and what to do to get around them. I have a project that I've set up with some test code, and I'm running into an error here: public class Foo { let name: String public init(name: String) { self.name = name } } public class Bar { let name: String public init(name : String) { self.name = name; } public func getFoo() -> Foo { return Foo(name: self.name); } } In the header file: Unknown type name 'Foo' SWIFT_INLINE_THUNK Foo getFoo() SWIFT_SYMBOL("s:13ForestBuilder3BarC6getFooAA0E0CyF"); This error goes away if I use structs, but for the purposes of porting my codebase, I'd prefer to use classes. Do classes not play nice here? Or am I misunderstanding something. Thanks.