Hey all! During the migration of a production app to swift 6, I've encountered a problem: when hitting the UNUserNotificationCenter.current().requestAuthorization the app crashes. If I switch back to Language Version 5 the app works as expected. The offending code is defined here class AppDelegate: NSObject, UIApplicationDelegate { func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool { FirebaseApp.configure() FirebaseConfiguration.shared.setLoggerLevel(.min) UNUserNotificationCenter.current().delegate = self let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound] UNUserNotificationCenter.current().requestAuthorization(options: authOptions) { _, _ in } application.registerForRemoteNotifications() Messaging.messaging().delegate = self return true } } The error is depicted here: I have no idea how to fix this. Any help will be really appreciated thanks in advance

import Foundation import FirebaseAuth import GoogleSignIn import FBSDKLoginKit class AuthController { // Assuming these variables exist in your class var showCustomAlertLoading = false var signUpResultText = "" var isSignUpSucces = false var navigateHome = false // Google Sign-In func googleSign() { guard let presentingVC = (UIApplication.shared.connectedScenes.first as? UIWindowScene)?.windows.first?.rootViewController else { print("No root view controller found.") return } GIDSignIn.sharedInstance.signIn(withPresenting: presentingVC) { authentication, error in if let error = error { print("Error: \(error.localizedDescription)") return } guard let authentication = authentication else { print("Authentication is nil") return } guard let idToken = authentication.idToken else { print("ID Token is missing") return } guard let accessToken = authentication.accessToken else { print("Access Token is missing") return } let credential = GoogleAuthProvider.credential(withIDToken: idToken.tokenString, accessToken: accessToken.tokenString) self.showCustomAlertLoading = true Auth.auth().signIn(with: credential) { authResult, error in guard let user = authResult?.user, error == nil else { self.signUpResultText = error?.localizedDescription ?? "Error occurred" DispatchQueue.main.asyncAfter(deadline: .now() + 2) { self.showCustomAlertLoading = false } return } self.signUpResultText = "\(user.email ?? "No email")\nSigned in successfully" self.isSignUpSucces = true DispatchQueue.main.asyncAfter(deadline: .now() + 3) { self.showCustomAlertLoading = false DispatchQueue.main.asyncAfter(deadline: .now() + 1) { self.navigateHome = true } } print("\(user.email ?? "No email") signed in successfully") } } } // Facebook Sign-In func signInWithFacebook(presentingViewController: UIViewController, completion: @escaping (Bool, Error?) -> Void) { let manager = LoginManager() manager.logIn(permissions: ["public_profile", "email"], from: presentingViewController) { result, error in if let error = error { completion(false, error) return } guard let result = result, !result.isCancelled else { completion(false, NSError(domain: "Facebook Login Error", code: 400, userInfo: nil)) return } if let token = result.token { let credential = FacebookAuthProvider.credential(withAccessToken: token.tokenString) Auth.auth().signIn(with: credential) { (authResult, error) in if let error = error { completion(false, error) return } completion(true, nil) } } } } // Email Sign-In func signInWithEmail(email: String, password: String, completion: @escaping (Bool, Error?) -> Void) { Auth.auth().signIn(withEmail: email, password: password) { (authResult, error) in if let error = error { completion(false, error) return } completion(true, nil) } } }

This is similar to this post https://developer.apple.com/forums/thread/700770 on using objc_copyClassList to obtain the available classes. When iterating the list, I try casting the result to an instance of a protocol and that works fine: protocol DynamicCounter { init(controlledByPlayer: Bool, game: Game) } class BaseCounter: NSObject, DynamicCounter { } static func withAllClasses<R>( _ body: (UnsafeBufferPointer<AnyClass>) throws -> R ) rethrows -> R { var count: UInt32 = 0 let classListPtr = objc_copyClassList(&count) defer { free(UnsafeMutableRawPointer(classListPtr)) } let classListBuffer = UnsafeBufferPointer( start: classListPtr, count: Int(count) ) return try body(classListBuffer) } static func initialize() { let monoClasses = withAllClasses { $0.compactMap { $0 as? DynamicCounter.Type } } for cl in monoClasses { cl.initialize() } } The above code works fine if I use DynamicCounter.Type on the cast but crashes if try casting to BaseCounter.Type instead. Is there a way to avoid the weird and non Swift classes?

In below Swift code , is there any possiblities of failure of Unmanaged.passRetain and Unmanaged.takeRetain calls ? // can below call fail (constructor returns nil due to OS or language error) and do i need to do explicit error handling here? let str = TWSwiftString(pnew) // Increasing RC by 1 // can below call fail (assuming str is valid) and do i need to do explicit error handling for the same ? let ptr:UnsafeMutableRawPointer? = Unmanaged.passRetained(str).toOpaque() // decrease RC by 1 // can below call fail (assuming ptr is valid) ? and do i need to do explicit error handling Unmanaged<TWSwiftString>.fromOpaque(pStringptr).release()

I would like to see examples of how to do this. Apple states that explicit clang modules don't work with C++ interop. ObjC++ has simple interop with C++. Swift does not. And so I'd like to know how to setup my C++ projects to build them as clang modules.

Hi all, Background: I am working as a library developer and would like to enable Swift C++ interoperability in our library. Our library supports both CocoaPods and SPM. Question: I would like to know whether it is possible to avoid breaking changes bring to the library users after enabling Swift C++ interoperability. In my experiment, all apps and packages depend on the library needs to enable interoperability in Xcode or package manage tools, otherwise the source code cannot be complied. I am wondering is there any ways to bypass this? For example, is there a way to only enable Swift C++ interoperability only in our libraries?

I'm using this library for encoding / decoding RSA keys. https://github.com/Kitura/BlueRSA It's worked fine up until macOS sequoia. The issue I'm having is the tests pass when in Debug mode, but the moment I switch to Release mode, the library no longer works. I ruled this down the swift optimization level. If I change the Release mode to no optimization, the library works again. Wondering where in the code this could be an issue? How would optimization break the functionality?

I used struct in the swift file, but once I use xcode build. It will automatically change to enum, causing build failure. But it turns out that this file can be used to build. Since upgrading to XCode16.1, it's not working anymore. I don't know where to set it up. Do not optimize or modify my code. Error message: 'Padding' cannot be constructed because it has no accessible initializers My environment is: macos sequoia 15.1 xcode 16.1(16B40) File source code： let π: CGFloat = .pi let customUserAgent: String = "litewallet-ios" let swiftUICellPadding = 12.0 let bigButtonCornerRadius = 15.0 enum FoundationSupport { static let dashboard = "https://support.litewallet.io/" } enum APIServer { static let baseUrl = "https://api-prod.lite-wallet.org/" } enum Padding { subscript(multiplier: Int) -> CGFloat { return CGFloat(multiplier) * 8.0 } subscript(multiplier: Double) -> CGFloat { return CGFloat(multiplier) * 8.0 } } enum C { static let padding = Padding() enum Sizes { static let buttonHeight: CGFloat = 48.0 static let sendButtonHeight: CGFloat = 165.0 static let headerHeight: CGFloat = 48.0 static let largeHeaderHeight: CGFloat = 220.0 } static var defaultTintColor: UIColor = UIView().tintColor Enum was originally SRTUCT. But the build has been automatically optimized

I have an app whose logic is in C++ and rest of the parts (UI) are in Swift and SwiftUI. Exceptions can occur in C++ and Swift. I've got the C++ part covered by using the Linux's signal handler mechanism to trap signals which get raised due to exceptions. But how should I capture exceptions in Swift? When I say exceptions in Swift, I mean, divide by zero, force unwrapping of an optional containing nil, out of index access in an array, etc. Basically, anything that can go wrong, I don't want my app to abruptly crash... I need a chance to finalise my stuff, alert the user, prepare diagnostic reports and terminate. I'm looking for a 'catch-all' exception handler. As an example, let's take Android. In Android, there is the setDefaultUncaughtExceptionHandler method to register for all kinds of exceptions in any thread in Kotlin. I'm looking for something similar in Swift that should work for macOS, iOS &amp; iPadOS, tvOS and watchOS. I first came across the NSSetUncaughtExceptionHandler method. My understanding is, this only works when I explicitly raise NSExceptions. When I tested it, observed that the exception handler didn't get invoked for either case - divide by zero or invoking raise. class AppDelegate: NSObject, NSApplicationDelegate { func applicationDidFinishLaunching(_ aNotification: Notification) { Log("AppDelegate.applicationDidFinishLaunching(_:)") // Set the 'catch-all' exception handler for Swift exceptions. Log("Registering exception handler using NSSetUncaughtExceptionHandler()...") NSSetUncaughtExceptionHandler { (exception: NSException) in Log("AppDelegate.NSUncaughtExceptionHandler()") Log("Exception: \(exception)") } Log("Registering exception handler using NSSetUncaughtExceptionHandler() succeeded!") // For C++, use the Linux's signal mechanism. ExceptionHandlingCpp.RegisterSignals() //ExceptionHandlingCpp.TestExceptionHandler() AppDelegate.TestExceptionHandlerSwift() } static func TestExceptionHandlerSwift() { Log("AppDelegate.TestExceptionHandlerSwift()") DivisionByZero(0) } private static func DivisionByZero(_ divisor: Int) { Log("AppDelegate.DivisionByZero()") let num1: Int = 2 Log("Raising Exception...") //let result: Int = num1/divisor let exception: NSException = NSException(name: NSExceptionName(rawValue: "arbitrary"), reason: "arbitrary reason", userInfo: nil) exception.raise() Log("Returning from DivisionByZero()") } } In the above code, dividing by zero, nor raising a NSException invokes the closure passed to NSSetUncaughtExceptionHandler, evident from the following output logs AppDelegate.applicationWillFinishLaunching(_:) AppDelegate.applicationDidFinishLaunching(_:) Registering exception handler using NSSetUncaughtExceptionHandler()... Registering exception handler using NSSetUncaughtExceptionHandler() succeeded! ExceptionHandlingCpp::RegisterSignals() .... AppDelegate.TestExceptionHandlerSwift() AppDelegate.DivisionByZero() Raising Exception... Currently, I'm reading about ExceptionHandling framework, but this is valid only for macOS. What is the recommended way to capture runtime issues in Swift?

I'll describe my crash with an example, looking for some insights into the reason why this is happening. @objc public protocol LauncherContainer { var launcher: Launcher { get } } @objc public protocol Launcher: UIViewControllerTransitioningDelegate { func initiateLaunch(url: URL, launchingHotInstance: Bool) } @objc final class LauncherContainer: NSObject, LauncherContainer, TabsContentCellTapHandler { ... init( ... ) { ... super.init() } ... // // ContentCellTapHandler // public func tabContentCellItemDidTap( tabId: String ) { ... launcher.initiateNewTabNavigation( tabId: tabId // Crash happens here ) } public class Launcher: NSObject, Launcher, FooterPillTapHandler { public func initiateNewTabNavigation(tabId: String) { ... } } public protocol TabsContentCellTapHandler: NSObject { func tabContentCellItemDidTap( tabId: String, }

macOS: Sequoia Xcode: 16.1 I am working on a macOS app and it has a widget feature. When I use Swift 6 (Build Settings > Swift Language Version) in IntentExtension, the intent configuration won't show up in macOS Sequoia. If I downgrade to Swift 5, it works without any other changes. Is it a bug or am I missing something? How can I use Swift 6 with IntentExtension.

So I found out clang can do multiarch compiles (-arch arm64 -arch x86_64). But Apple seems to have left precompiled header support out. So I built the pch separately for each arch. That all works. The next problem is that one needs to specify -include-pch foo.x64.pch and -include-pch foo.arm64.pch on the command line. This doesn't work on the compile line, since it tries to prepend arm64 AST to a x64 .o file, and vice versa. So there is -Xarch_arm64 and -Xarch_x86_64 . But that option is limited to one argument. But "-include-pch foo.x64.pch" is two arguments. More details of failed attempts here: https://github.com/llvm/llvm-project/issues/114626 And no splitting out the builds isn't the same, because then -valid_arch I don't think skips the other build. This are all libraries being built by Make, and then the universal app built using an Xcode project from the libraries.

I'll describe my crash with an example, looking for some insights into the reason why this is happening. @objc public protocol LauncherContainer { var launcher: Launcher { get } } @objc public protocol Launcher: UIViewControllerTransitioningDelegate { func initiateLaunch(url: URL, launchingHotInstance: Bool) } @objc final class LauncherContainer: NSObject, LauncherContainer, TabsContentCellTapHandler { ... init( ... ) { ... super.init() } ... // // ContentCellTapHandler // public func tabContentCellItemDidTap( tabId: String ) { ... launcher.initiateNewTabNavigation( tabId: tabId // Crash happens here ) } public class Launcher: NSObject, Launcher, FooterPillTapHandler { public func initiateNewTabNavigation(tabId: String) { ... } } public protocol TabsContentCellTapHandler: NSObject { func tabContentCellItemDidTap( tabId: String, } Crash stack last 2 lines are- libswiftCore.dylib swift_unknownObjectRetain libswiftCore.dylib String._bridgeToObjectiveCImpl() String._bridgeToObjectiveCImpl() gets called when the caller and implementation is in Swift file I believe due to @objc class LauncherContainer there'd be bridging header generated. Does that mean tabId passed to tabContentCellItemDidTap is a String but the one passed to initiateNewTabNavigation is NSString? TabId is UUID().uuidString if that helps. Wondering if UUID().uuidString has something to do with this. Thanks a ton for helping. Please find attached screenshot of the stack trace.

In my project, i have a Swift class with a class level property of type string. Like this : class TWSwiftString { var pString:String! init(_ pString: String) { self.pString = pString } } I am creating intance of this class and then creating a opaque pointer to this intance. Like this : let str = TWSwiftString("World") // Increasing RC by 1 strptr = Unmanaged.passRetained(str).toOpaque() Now using this opaque pointer i want to modify the value of pString by directly operating on memory. Like this: withUnsafeMutablePointer(to: &strptr.pString) { strPointer in strPointer.pointee = "World" } Although i am able to modify pString like this and print. Lets assume i have a approach to make sure memory remains valid when it is operated on and freeing of memory is also handled somehow . Will this approach work if i have 100s of intance of this string which are being operated in this manner ? What if the size of new value is greater than existing string value ? For this i am thinking of chunk of memory initially and then keep on increasing size of it as bigger string then this chunk comes. Does this approach seems feasible ? Any other problems i can encounter by using this approach ? Chatgpt gave this answer : To directly update the memory of a Swift class’s property, particularly to alter a String property, is generally discouraged due to Swift's memory safety model. However, if we want to access and modify a class property directly, the best practice is to use a property accessor, as manually altering memory could lead to undefined behavior or even crashes. Why Direct Memory Manipulation Is Risky When you attempt to manipulate memory directly, especially with Swift’s memory model, you might alter not only the value but also the memory layout of Swift’s String type, which could break things internally. The Swift compiler may store String differently based on the internal structure, so even if we manage to locate the correct memory address, directly modifying it is unreliable. do you have any opinion around chatgpt resoponse ?

I am using swiftui lately in my iOS mobile app, The Mobile app already has a pipeline that detect any experimental features and throw an error I am using swift 5 and as you all know SwiftUI is using some of OpaqueTypeErasure utility types like "some" I heard that in swift 6 the OpaqueTypeErasure is not experimental anymore But upgrading the app swift version will be a very long process Also changing the pipeline will be a very long and tiring process So i want to know if there is a way to remove OpaqueTypeErasure from SwiftUI and what is the alternatives for bypassing the error that being thrown from the pipeline

When Xcode is connected to the mobile phone for debugging, the app that contains the logic of executing machine code runs normally, but if Xcode is disconnected and the app is run alone, it will crash. First use the xcode-run execution function to start the app The machine code logic executes normally Disconnect the phone from xcode Start the app 5.Crash Here is the test code：https://gitee.com/FanChiang_admin/demo.git

We are seeing a crash on Big Sur 11.7.10 after switching the build system to use Xcode 15 Excerpt from crash Time Awake Since Boot: 1700 seconds System Integrity Protection: enabled Crashed Thread: 0 Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY Termination Reason: DYLD, [0x4] Symbol missing Application Specific Information: dyld: launch, loading dependent libraries Dyld Error Message: Symbol not found: __ZNSt3__17codecvtIDiDu11__mbstate_tE2idE Referenced from: /Applications/SecureworksTaegis.app/Contents/MacOS/com.secureworks.agent.daemon.app/Contents/MacOS/com.secureworks.agent.daemon Expected in: /usr/lib/libc++.1.dylib in /Applications/SecureworksTaegis.app/Contents/MacOS/com.secureworks.agent.daemon.app/Contents/MacOS/com.secureworks.agent.daemon Build system has the following specs : ProductName: macOS ProductVersion: 14.3.1 BuildVersion: 23D60 Xcode 15.2 Build version 15C500b CMAKE PROPS set(CMAKE_CXX_STANDARD 20) set(CMAKE_CXX_EXTENSIONS OFF) set(CMAKE_OSX_DEPLOYMENT_TARGET 11.0)

hi i want create a commande line tool for arm64 et intel x86-64 Xcode 16 macbook pro M3 my setting : and but my application compile only for arm64 who can explain to me ?

I wonder if this is correct behavior. I was surprised to get this result when compiling and running the following C code with Apple clang version 14.0.0 (clang-1400.0.29.102) target arm64-apple-darwin21.6.0 on a M1 Pro 12.7.6 with cc -O2 file.c: #include <stdio.h> #include <stdlib.h> unsigned long long factorial(int n) { unsigned long long fac = 1; while (n > 0) fac *= n; return fac; } int main() { return factorial(1); } Compiling with -O2 and running this code gives "Trace/BPT trap". Checking with LLDB: $ lldb ./a.out (lldb) target create "./a.out" Current executable set to '/Users/engelen/Projects/Euler/a.out' (arm64). (lldb) run Process 79580 launched: '/Users/engelen/Projects/Euler/a.out' (arm64) Process 79580 stopped * thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BREAKPOINT (code=1, subcode=0x100003fb4) frame #0: 0x0000000100003fb4 a.out`main at 20.c:9:3 [opt] 6 unsigned long long fac = 1; 7 while (n > 0) 8 fac *= n; -> 9 return fac; 10 } 11 12 int main() The loop is non-terminating. But a breakpoint trap is triggered at the return statement. The code should just hang in the loop IMO, not trap, because it never updates variable n (a correct factorial function should decrement n). Never seen this before (not since I started wiring C code in the 80s.) If I change the update *= into += then there is no trap.

i have macos 15 and xcode 16 swift 6 and want to make apps to run on macintosh. i know the syntax of this programming language, but i need informations like which libraries i have to import for func's which name i do not know, and parameters i have not found on websites or the tutorial on swift. i need procedures like open window at x,y,width,height draw rectangle at x,y,width,height,color draw text at x,y,width,height,color,size read keyboard-letter,up/dn,shift read mouse x,y,buttons