I have a client who asked me to create an app that reads nfc data, but this data needs to come from a built in iPhone nfc tag, so the app will read through nfc the SECOND device info. my question is, does the iPhone has a built in nfc tag? if so, can it share any device info?

I got the error and I don’t how can I fix it help please struct MovieDetail: View { var movie: Movie let screen = UIScreen.main.bounds @State private var showSeasonPicker = true @State private var selectedSeason = 0 var body: some View { ZStack { Color.black .ignoresSafeArea() ZStack { VStack { HStack { Spacer() Button() { // Closing Button }label: { Image(systemName: "xmark.circle") .font(.system(size: 28)) } } .padding(.horizontal, 22) ScrollView (.vertical, showsIndicators: false){ VStack { StandardHomeMovie(movie: movie) .frame(width: screen.width / 2.5) MovieInfoSubheadline(movie: movie) if movie.promotionHeadline != nil { Text(movie.promotionHeadline!) .bold() .font(.headline) } PlayButton(text: "Play", imagename: "play.fill", backgroundColor: .red) { // } CurrentEpisodeInformation(movie: movie) CastInfo(movie: movie) HStack(spacing: 60){ SmallVerticalButton(text: "My List", isOnImage: "checkmark", isOffImage: "plus", isOn: true) { // } SmallVerticalButton(text: "Rate", isOnImage: "hand.thumbsup.fill", isOffImage: "hand.thumbsup", isOn: true) { // } SmallVerticalButton(text: "Share", isOnImage: "square.and.arrow.up", isOffImage: "square.and.arrow.up", isOn: true) { // } Spacer() } .padding(.leading, 20) CustomTabSwitcher(tabs: [.episodes, .trailers, .more], movie: movie, showSeasonPicker: $showSeasonPicker, selectedSeason: $selectedSeason) } .padding(.horizontal, 10) } Spacer() } .foregroundStyle(.white) if showSeasonPicker { Group { Color.black.opacity(0.9) VStack(spacing: 40){ Spacer() ForEach(0..<(movie.numberOfSeasons ?? 0)) { season in Button(action: { self.selectedSeason = (season != 0) self.showSeasonPicker = false }, label: { Text("Season: \(season + 1)") .foregroundStyle(selectedSeason == season + 1 ? .white : .gray) .bold() .font(.title2) }) } Spacer() Button(action: { self.showSeasonPicker = false }, label: { Image(systemName: "xmark.circle.fill") .foregroundStyle(.white) .font(.system(size: 40)) .scaleEffect(x: 1.1) }) .padding(.bottom, 30) } } .ignoresSafeArea() } } } } } #Preview { MovieDetail(movie: exampleMovie2) } struct MovieInfoSubheadline: View { var movie: Movie var body: some View { HStack(spacing: 20){ Image(systemName: "hand.thumbsup.fill") .foregroundStyle(.white) Text(String(movie.year)) RatingView(rating: movie.rating) Text(movie.numberOfSeasonsDisplay) ZStack{ Text("HD") .foregroundStyle(.white) .font(.system(size: 12)) .bold() Rectangle() .stroke(.gray, lineWidth: 2) .frame(width: 30, height: 20) } } .foregroundStyle(.gray) .padding(.vertical, 6) } } struct RatingView: View { var rating: String var body: some View { ZStack { Rectangle() .foregroundStyle(.gray) Text(rating) .foregroundStyle(.white) .font(.system(size: 12)) .bold() } .frame(width: 50, height: 20) } } struct CastInfo: View { var movie: Movie var body: some View { VStack(spacing: 3) { HStack { Text("Cast: \(movie.cast)") Spacer() } HStack { Text("Creaters: \(movie.creaters)") Spacer() } } .font(.caption) .foregroundStyle(.gray) .padding(.vertical, 10) } } struct CurrentEpisodeInformation: View { var movie: Movie var body: some View { Group { HStack { Text(movie.episodeInfoDisplay) .bold() Spacer() } .padding(.vertical, 4) HStack { Text(movie.episodeDescriptionDisplay) .font(.subheadline) Spacer() } } } }

Usage of multiple async lets crashes the app in a nondeterministic fashion. We are experiencing this crash in production, but it is rare. 0 libswift_Concurrency.dylib 0x20a8b89b4 swift_task_create_commonImpl(unsigned long, swift::TaskOptionRecord*, swift::TargetMetadata<swift::InProcess> const*, void (swift::AsyncContext* swift_async_context) swiftasynccall*, void*, unsigned long) + 384 1 libswift_Concurrency.dylib 0x20a8b6970 swift_asyncLet_begin + 36 We managed to isolate the issue, and we submitted a technical incident (Case-ID: 8007727). However, we were completely ignored, and referred to the developer forums. To reproduce the bug you need to run the code on a physical device and under instruments (we used swift concurrency). This bug is present on iOS 17 and 18, Xcode 15.1, 15.4 and 16 beta, swift 5 and 6, including strict concurrency. Here's the code for Swift 6 / Xcode 16 / strict concurrency: (I wanted to attach the project but for some reason I am unable to) typealias VoidHandler = () -> Void enum Fetching { case inProgress, idle } protocol PersonProviding: Sendable { func getPerson() async throws -> Person } actor PersonProvider: PersonProviding { func getPerson() async throws -> Person { async let first = getFirstName() async let last = getLastName() async let age = getAge() async let role = getRole() return try await Person(firstName: first, lastName: last, age: age, familyMemberRole: role) } private func getFirstName() async throws -> String { try await Task.sleep(nanoseconds: 1_000_000_000) return ["John", "Kate", "Alex"].randomElement()! } private func getLastName() async throws -> String { try await Task.sleep(nanoseconds: 1_400_000_000) return ["Kowalski", "McMurphy", "Grimm"].randomElement()! } private func getAge() async throws -> Int { try await Task.sleep(nanoseconds: 2_100_000_000) return [56, 24, 11].randomElement()! } private func getRole() async throws -> Person.Role { try await Task.sleep(nanoseconds: 500_000_000) return Person.Role.allCases.randomElement()! } } @MainActor final class ViewModel { private let provider: PersonProviding = PersonProvider() private var fetchingTask: Task<Void, Never>? let onFetchingChanged: (Fetching) -> Void let onPersonFetched: (Person) -> Void init(onFetchingChanged: @escaping (Fetching) -> Void, onPersonFetched: @escaping (Person) -> Void) { self.onFetchingChanged = onFetchingChanged self.onPersonFetched = onPersonFetched } func fetchData() { fetchingTask?.cancel() fetchingTask = Task { do { onFetchingChanged(.inProgress) let person = try await provider.getPerson() guard !Task.isCancelled else { return } onPersonFetched(person) onFetchingChanged(.idle) } catch { print(error) } } } } struct Person { enum Role: String, CaseIterable { case mum, dad, brother, sister } let firstName: String let lastName: String let age: Int let familyMemberRole: Role init(firstName: String, lastName: String, age: Int, familyMemberRole: Person.Role) { self.firstName = firstName self.lastName = lastName self.age = age self.familyMemberRole = familyMemberRole } } import UIKit class ViewController: UIViewController { @IBOutlet private var first: UILabel! @IBOutlet private var last: UILabel! @IBOutlet private var age: UILabel! @IBOutlet private var role: UILabel! @IBOutlet private var spinner: UIActivityIndicatorView! private lazy var viewModel = ViewModel(onFetchingChanged: { [weak self] state in switch state { case .idle: self?.spinner.stopAnimating() case .inProgress: self?.spinner.startAnimating() } }, onPersonFetched: { [weak self] person in guard let self else { return } first.text = person.firstName last.text = person.lastName age.text = "\(person.age)" role.text = person.familyMemberRole.rawValue }) @IBAction private func onTap() { viewModel.fetchData() } }

It seems I can declare variables like below in a source file: private let var1 = 1234 fileprivate let var2 = "abcd" class MyClass { // ... } So what's the difference between the 2 vars here?

I have a custom localisation function in my project that enforces the inclusion of the bundle parameter (specifically so that Swift packages are forced to include the Bundle.module value). While migrating to String Catalogs, I noticed that my custom localisation function wasn't being recognised by the automatic extraction that the Swift compiler is doing, but only in my Swift package targets. Is there a way to set something like LOCALIZED_STRING_MACRO_NAMES in Swift Packages?

This is the error I am continuosly receiving.

@discardableResult func doSomething() -> Bool { // does something return true } This function can be called in the following ways: doSomething() let didSucceed = doSomething() Is there a way to differentiate the two from inside the doSomething() function, as in, is there a way to know if the caller is using the result?

I want to build a Swift library package that uses modified build of OpenSSL and Curl. I have already statically compiled both and verified I can use them in an Objective-C framework on my target platform (iOS & iOS Simulator). I'm using XCFramework files that contain the static library binaries and headers: openssl.xcframework/ ios-arm64/ openssl.framework/ Headers/ [...] openssl ios-arm64_x86_64-simulator/ openssl.framework/ Headers/ [...] openssl Info.plist I'm not sure how I'm supposed to set up my Swift package to import these libraries. I can use .systemLibrary but that seems to use the embedded copies of libssl and libcurl on my system, and I can't figure out how to use the path: parameter to that. I also tried using a .binaryTarget pointing to the XCFramework files, but that didn't seem to work as there is no module generated and I'm not sure how to make one myself. At a basic high level, this is what I'm trying to accomplish: where libcrypto & libssl come from the provided openssl.xcframework file, and libcurl from curl.xcframework

HI, I have a app with Swift Programming language. It is built successfully on my Monterey Intel by using Xcode 14. I am trying to built same app on Sonoma Silicon arm64 by using Xcode 15.4. But app is failing to build with below errors. Can anyone suggest reason for this? Copy /Users/testuser/git/agent/out/Darwin/Release/TESTFileProvider.appex/Contents/Resources/swift-nio__NIOFileSystem.bundle /Users/testuser/git/agent/out/Darwin/Release/swift-nio__NIOFileSystem.bundle (in target 'TESTFileProvider' from project 'TEST') cd /Users/testuser/git/agent/dgagent/agent/macosx/dgc/TEST builtin-copy -exclude .DS_Store -exclude CVS -exclude .svn -exclude .git -exclude .hg -resolve-src-symlinks /Users/testuser/git/agent/out/Darwin/Release/swift-nio__NIOFileSystem.bundle /Users/testuser/git/agent/out/Darwin/Release/TESTFileProvider.appex/Contents/Resources error: /Users/testuser/git/agent/out/Darwin/Release/swift-nio__NIOFileSystem.bundle: No such file or directory (in target 'TESTFileProvider' from project 'TEST') Copy /Users/testuser/git/agent/out/Darwin/Release/TESTFileProvider.appex/Contents/Resources/swift-nio_NIOPosix.bundle /Users/testuser/git/agent/out/Darwin/Release/swift-nio_NIOPosix.bundle (in target 'TESTFileProvider' from project 'TEST') cd /Users/testuser/git/agent/dgagent/agent/macosx/dgc/TEST builtin-copy -exclude .DS_Store -exclude CVS -exclude .svn -exclude .git -exclude .hg -resolve-src-symlinks /Users/testuser/git/agent/out/Darwin/Release/swift-nio_NIOPosix.bundle /Users/testuser/git/agent/out/Darwin/Release/TESTFileProvider.appex/Contents/Resources error: /Users/testuser/git/agent/out/Darwin/Release/swift-nio_NIOPosix.bundle: No such file or directory (in target 'TESTFileProvider' from project 'TEST')

I'm continuing with the migration towards Swift 6. Within one of our libraries, I want to check whether a parameter object: Any? confirms to Sendable. I tried the most obvious one: if let sendable = object as? Sendable { } But that results into the compiler error "Marker protocol 'Sendable' cannot be used in a conditional cast". Is there an other way to do this?

Hey, im new here. And I need to share a variable between files, settings and home. I've searched all over and found solutions, but I just don't understand what to do.

Hello there, we have the following crash in production (99% in background) with our latest release, but we are not able to indentify 100% the main actor. It could be Intercom SDK. Firebase reports: Crash CoreFoundation __CFRunLoopServiceMachPort mach_msg __CFRunLoopServiceMachPort Any suggestion?

Hi, I am writing my own little toy programming language and when I try to link the binary object file (.o file) it requires a _main symbol. I wonder if there is a way to exclude this, presumably, a C runtime requirement? Is it safe to provide a stub _main symbol, or provide a the _main as the entry point to my own little runtime? What is the correct way to invoke the linker with the appropriate flags?

I want to ask about NSDecimalNumber. is it any changes for use this function ? i test use number like this. example: a = "1000000.0" var a i make number formatter use NumberFormatter b = NSDecimalNumber(string: a with number formatter).decimalValue i try to print b. the value return 1. Anyone can help ?

Helo all, Currently, I'm working on an iOS app that performs measurement and shows the results to the user in a graph. I use a Savitzky-Golay filter to filter out noise, so that the graph is nice and smooth. However, the code that calculates the Savitzky-Golay coefficients using sparse matrices crashes sometimes, throwing an EXC_BAD_ACCESS. I tried to find out what the problem is by turning on Address Sanitizer and Thread Sanitizer, but, for some reason, the bad access exception isn't thrown when either of these is on. What else could I try to trace back the problem? Thanks in advance, CaS To reproduce the error, run the following: import SwiftUI import Accelerate struct ContentView: View { var body: some View { VStack { Button("Try", action: test) } .padding() } func test() { for windowLength in 3...100 { let coeffs = SavitzkyGolay.coefficients(windowLength: windowLength, polynomialOrder: 2) print(coeffs) } } } class SavitzkyGolay { static func coefficients(windowLength: Int, polynomialOrder: Int, derivativeOrder: Int = 0, delta: Int = 1) -> [Double] { let (halfWindow, remainder) = windowLength.quotientAndRemainder(dividingBy: 2) var pos = Double(halfWindow) if remainder == 0 { pos -= 0.5 } let X = [Double](stride(from: Double(windowLength) - pos - 1, through: -pos, by: -1)) let P = [Double](stride(from: 0, through: Double(polynomialOrder), by: 1)) let A = P.map { exponent in X.map { pow($0, exponent) } } var B = [Double](repeating: 0, count: polynomialOrder + 1) B[derivativeOrder] = Double(factorial(derivativeOrder)) / pow(Double(delta), Double(derivativeOrder)) return leastSquaresSolution(A: A, B: B) } static func leastSquaresSolution(A: [[Double]], B: [Double]) -> [Double] { let sparseA = A.sparseMatrix() var sparseAValuesCopy = sparseA.values var xValues = [Double](repeating: 0, count: A.transpose().count) var bValues = B sparseAValuesCopy.withUnsafeMutableBufferPointer { valuesPtr in let a = SparseMatrix_Double( structure: sparseA.structure, data: valuesPtr.baseAddress! ) bValues.withUnsafeMutableBufferPointer { bPtr in xValues.withUnsafeMutableBufferPointer { xPtr in let b = DenseVector_Double( count: Int32(B.count), data: bPtr.baseAddress! ) let x = DenseVector_Double( count: Int32(A.transpose().count), data: xPtr.baseAddress! ) #warning("EXC_BAD_ACCESS is thrown below") print("This code is executed...") let status = SparseSolve(SparseLSMR(), a, b, x, SparsePreconditionerDiagScaling) print("...but, if an EXC_BAD_ACCESS is thrown, this code isn't") if status != SparseIterativeConverged { fatalError("Failed to converge. Returned with error \(status).") } } } } return xValues } } func factorial(_ n: Int) -> Int { n < 2 ? 1 : n * factorial(n - 1) } extension Array where Element == [Double] { func sparseMatrix() -> (structure: SparseMatrixStructure, values: [Double]) { let columns = self.transpose() var rowIndices: [Int32] = columns.map { column in column.indices.compactMap { indexInColumn in if column[indexInColumn] != 0 { return Int32(indexInColumn) } return nil } }.reduce([], +) let sparseColumns = columns.map { column in column.compactMap { if $0 != 0 { return $0 } return nil } } var counter = 0 var columnStarts = [Int]() for sparseColumn in sparseColumns { columnStarts.append(counter) counter += sparseColumn.count } let reducedSparseColumns = sparseColumns.reduce([], +) columnStarts.append(reducedSparseColumns.count) let structure: SparseMatrixStructure = rowIndices.withUnsafeMutableBufferPointer { rowIndicesPtr in columnStarts.withUnsafeMutableBufferPointer { columnStartsPtr in let attributes = SparseAttributes_t() return SparseMatrixStructure( rowCount: Int32(self.count), columnCount: Int32(columns.count), columnStarts: columnStartsPtr.baseAddress!, rowIndices: rowIndicesPtr.baseAddress!, attributes: attributes, blockSize: 1 ) } } return (structure, reducedSparseColumns) } func transpose() -> Self { let columns = self.count let rows = self.reduce(0) { Swift.max($0, $1.count) } return (0 ..< rows).reduce(into: []) { result, row in result.append((0 ..< columns).reduce(into: []) { result, column in result.append(row < self[column].count ? self[column][row] : 0) }) } } }

Hello! I am working on a project that does some automatic code generation using SwiftSyntax and SwiftSyntaxBuilder. As part of this project, I want to put in a comment at the top of the file warning users to not modify the file and make it obvious that the code was automatically generated. I was trying to use the .lineComment(String) static member of the Trivia (or TriviaPiece) types and I expected that the comment would automatically be prefixed with the expected // and space for use in code. (For example, Trivia.lineComment("No comment") would be written as // No Comment when sent through a BasicFormat Object or similar SyntaxRewriter). I was surprised to find that this is not the case and was wondering before I write an issue on GitHub whether this behavior is intentional or a bug. If it is intentional, I'm not entirely sure if I'm missing something regarding this to more easily generate these comments. At the moment my comment generation consists of constructing the comment in the leadingTrivia of the syntax node that appears after the comment. For example: VariableDeclSyntax(leadingTrivia: [.newlines(2), .lineComment("// These members are always generated irrespective of the contents of the generated files. They are intended to exclusively centralize code symbols that would otherwise be repeated frequently."), .newlines(1)], modifiers: [DeclModifierSyntax(name: .keyword(.private)), DeclModifierSyntax(name: .keyword(.static))], .let, name: PatternSyntax(IdentifierPatternSyntax(identifier: "decoder")), initializer: InitializerClauseSyntax(value: ExprSyntax(stringLiteral: "\(configuration.decoderExpression)"))) outputs // These members are always generated irrespective of the contents of the generated files. They are intended to exclusively centralize code symbols that would otherwise be repeated frequently. private static let decoder = JSONDecoder() in this project (with example data having been added).

In a completely new project using Objective-C, when using "NSDateFormatter" under the conditions mentioned, setting initWithLocaleIdentifier to "NSCalendarIdentifierGregorian" results in "dateFromString" returning nil. This issue is occurring specifically in iOS 18 beta 1 and 2, and it's causing me significant trouble. This process works correctly on iOS 17 and earlier versions. NSDateFormatter *formatter = [[NSDateFormatter alloc] init]; [formatter setTimeStyle:NSDateFormatterFullStyle]; [formatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:NSCalendarIdentifierGregorian]]; [formatter setDateFormat:formatStr]; NSDate *date = [formatter dateFromString:formatStr]; "date" is nil.

I had code compiling with C++20 using XCode 14.3. I now updated to XCode 15.4, and that feature is not available anymore... No member named 'join' in namespace 'std::ranges::views' Why is join got dropped?

Hello, I want to use Automatic Grammar Agreement to localise a string in my app, let say "three remaining activities". The string "three" is obtained by using a NumberFormatter with a numberStyle set to .spellOut (so I'm not using an Integer) var formatter: NumberFormatter = NumberFormatter() formatter.numberStyle = .spellOut let formattedCount: String = numberFormatter.string(from: count as NSNumber)! Text("key_with_string_\(formattedCount)") In my string catalog, I have translated the key key_with_string_%@ like this ^[%@ remaining activity](inflect: true), but it does not work. I've tried to add the integer value used by the number formatter in the key key_with_string_%@_%lld but it does not work. Should Automatic Grammar Agreement work normally just by using the formatted string provided by the NumberFormatter? If not, is there a way to specify to use a secondary variable (my count integer) to switch between different categories like one and other automatically? Thanks ! Axel

Hello everyone, I'm encountering an issue with Swift and C++ interoperability when passing a void pointer between Swift and C++ functions. When I pass pMessageBuffer (an UnsafeMutableRawPointer) from Swift to MyCppClass.NFCompletion (a static c++ function), which expects a reference to void pointer, Swift throws an error "Cannot convert value of type 'UnsafeMutableRawPointer' to expected argument type 'Optional' ". Here is a sample code to help in better visualization of the usecase. Cpp Code class MyCppClass { public: static void SendData(void *pMessage, TUInt16 pMessageLength) { // Assume vSocket is my Swift object held in C++. vSocket.Send(pMessage, pMessageLength); } static void NFCompletion(void * & pBuffer, TInt64 pErrorCode, VPtr pCompletionFunction) { // Process the buffer. } }; Swift Code: public class MySwiftClass { var vConnection: NWConnection? public init() {} public func Send(_ pMessageBuffer: UnsafeMutableRawPointer, _ pMessageLength: TSUInt16) { let messageData = Data(bytesNoCopy: pMessageBuffer, count: Int(pMessageLength), deallocator: .none) self.vConnection?.send(content: messageData, completion: .contentProcessed { nw_error in var error_code: TSInt64 = 0 if let nw_error = nw_error { error_code = self.InternalGetNetworkErrorCode(nw_error) } // Here's where the issue arises: MyCppClass.NFCompletion(pMessageBuffer, TInt64(error_code), self.uCompletionHandler) }) } // Example function to handle network errors private func InternalGetNetworkErrorCode(_ error: Error) -> TSInt64 { // Implementation to convert nw_error to TSInt64 error code return 0 // Placeholder return value } } Could someone please help me understand why this conversion error occurs? How should I correctly handle passing a void pointer between Swift and C++ functions, ensuring compatibility and proper memory management? Note: TSInt64 is typealias for swift Int and TInt64 is alias of c++ int_64t. Thank you in advance for your assistance! Regards, Harshal