@Ed Ford, for this useful clarification. So that means there is no urgency to switch to Swift 6 mode, unless of course there are concurrency issues or we need specific Swift 6 feature ? I understand however that it is wise to set concurrency checking at the max level, even in Swift 5 mode. Is it correct ?

@eskimo that was when testing with Swift6 and Xcode 16.4. But after encapsulating the code using IBOutlet in MainActor.assumeIsolated({ // using textField.text }) I could remove the nonIsolated declaration for IBOutlet and get it working. Unfortunately, I've not kept a version to reproduce the error. In any case, I will not switch to Swift6 before using Xcode 26.

Logically, users would receive an error message from your app if backend is off. In any case, if you don't update the app for 3 years, it will be removed automatically. May be the best is just to wait ?

No feedback. Closing the thread.

@Engineer Thanks for reply. Some more crash info. On simulator (did not test on device at this stage). Here is crash report: Error occurs in #4 notifyMe IBAction @IBAction func notifyMe(_ sender: UIButton) { let center = UNUserNotificationCenter.current() center.delegate = self center.getNotificationSettings(completionHandler: { (settings) in if settings.authorizationStatus == .notDetermined { center.requestAuthorization(options: [.alert, .sound, .badge]) { (granted, error) in DispatchQueue.main.async { if !granted { // Alert user } } } } else if settings.authorizationStatus == .denied { DispatchQueue.main.async { // Alert user } } else if settings.authorizationStatus == .authorized { DispatchQueue.main.async { self.alarmButton.isHidden = self.duree <= 120 } } }) var alertStyle = UIAlertController.Style.alert let alertController = UIAlertController( title: NSLocalizedString("M'avertir", comment: ""), message: NSLocalizedString("Attention", comment: ""), preferredStyle: alertStyle) var title = NSLocalizedString("5'", comment: "") let ok = UIAlertAction(title: title, style: .default, handler: {(action) -> Void in self.sendInitialNotification(beforeEnd: 5) DispatchQueue.main.async { sender.isHidden = true } }) alertController.addAction(ok) let cancelAction = UIAlertAction(title: NSLocalizedString("Non", comment: ""), style: .default, handler: { (action) -> Void in alertController.addAction(cancelAction) present(alertController, animated: true, completion: nil) } Crash apparently occurs on calling userNotificationCenter: nonisolated func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) { if notification.request.identifier == requestIdentifier { completionHandler( [.alert,.sound,.badge]) } }

Thanks Quinn. I removed the nonisolated for IBOutlet. But, as shown in your example, I had to mark all func în a class that uses UNUserNotificationCenterDelegate as nonIsolated, such as nonisolated func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) I also note in your example that you marked response for didReceive as async. I tried to, but got the error: Instance method 'userNotificationCenter(_:didReceive:withCompletionHandler:)' nearly matches optional requirement 'userNotificationCenter(_:didReceive:withCompletionHandler:)' of protocol 'UNUserNotificationCenterDelegate' with the advice to Make 'userNotificationCenter_:didReceive:withCompletionHandler:)' private to silence this warning Converting to Swift 6 is definitely not an easy ride… I'll do extensive testing.

Thanks for the answer. didReceive was already non isolated. So problem likely does not come from here. For willPresent, if I don't make it nonIsolated, I get an Xcode 16.4 compiler error: Main actor-isolated instance method 'userNotificationCenter(_:willPresent:withCompletionHandler:)' cannot be used to satisfy nonisolated requirement from protocol 'UNUserNotificationCenterDelegate' n Xcode 26, no error in func declaration if I remove nonIsolated. But error at UIViewController class definition level Conformance of 'CalcViewController' to protocol 'UNUserNotificationCenterDelegate' crosses into main actor-isolated code and can cause data races

Improved with Beta 4 and 5. Now, the text does not disappear when button is tapped, but is dimmed (like in disabled state). So I think it is the final version of UI.

MainActor.assumeIsolated seems the simplest way to go. I have noticed an important point when converting to Swift 6 which may help others. At some point, I had nearly 200 errors… Don't panic they say… Problem was that errors kept coming and disappearing. Just as if the compiler was a bit lost (and me with him) with all the changes occurring on classes or func (such as declaring MainActor or non isolated). This made error correction pretty erratic. I did a Clean build folder, and the number of errors dropped to less than 10.

@reflexx Thanks for the feedback. Hope someone more expert will provide you with a $1 answer. 😉 Otherwise, don’t forget to close the thread. Have a good day.

That seems a reasonable guess. So it's time to prepare: https://wwdcnotes.com/documentation/wwdcnotes/wwdc24-10169-migrate-your-app-to-swift-6/

You may build something custom. Just for illustration: typealias FruitDict = [String: (String, Int)] let myFruitBasket : FruitDict = ["apple":("red", 1), "banana": ("yellow", 2), "budbeeri": ("dark violet", 3), "chikoo": ("brown", 4)] func subBasket(_ basket: FruitDict, range: ClosedRange<Int>) -> [String: String] { let filtered = basket.filter { $0.value.1 >= range.lowerBound && $0.value.1 <= range.upperBound } let sub = filtered.mapValues{ value in value.0 } return sub } let sub: [String: String] = subBasket(myFruitBasket, range: 1...3) print(sub) print("keys: ", sub.keys) print("values", sub.values) You get: ["banana": "yellow", "apple": "red", "budbeeri": "dark violet"] keys: ["banana", "apple", "budbeeri"] values ["yellow", "red", "dark violet"] Of course, that's not ordered (order does not mean anything with dictionaries), as Quinn explained. But if you plan to use the result as a dictionary, that doesn't matter. To get ordered, you have to convert to array. Or you can compute: let sortedKeys = sub.keys.sorted() print("sorted keys: ", sortedKeys) for key in sortedKeys { print("sorted values", sub[key] ?? "") } And get sorted keys: ["apple", "banana", "budbeeri"] values red values yellow values dark violet

Interesting question (would like to see the solution), so my 1 cent contribution. Sorry if it is worthless. In The Swift Programming Language (Swift 5.7) : struct Point { var x, y: Int } @dynamicMemberLookup struct PassthroughWrapper<Value> { var value: Value subscript<T>(dynamicMember member: KeyPath<Value, T>) -> T { get { return value[keyPath: member] } } } let point = Point(x: 381, y: 431) let wrapper = PassthroughWrapper(value: point) print(wrapper.x) Have you tried to mimic this, by adding a value property in ElectronicComponent and calling PassthroughWrapper(value: resistorA) ?

Welcome to the forum. So your wait time is about 1 week 1/2, not a month… I suspect reviewer is specially cautious about this type of app and how it is moderated. IMHO that's a legitimate concern. As it too 2 weeks the first time, wait for a few more days. After that, if no news, you could contact support. PS: avoid to duplicate posts.

has not responded to my request to switch to an organization account Who did you ask ? Did you contact support for help ? If that may help: https://help.uscreen.tv/en/articles/8284333-convert-apple-developer-account-from-individual-to-business https://ptwired.zendesk.com/hc/en-us/articles/360046161214-Change-your-Apple-Developer-Account-from-Individual-to-Organization