I followed the advice from one of the latest WWDC videos on how to handle localization and in my app I launch Settings of my app when the user wants to change the app language (not system language). The user can then select one of the available languages that my app is localized for. The localization part works well, but sometimes it happens that when I click the < My app button in the leading, top corner or just navigate back to my app, I encounter a frozen screen and then the app just quits and restarts after 2-3 seconds. I don't need to preserve any state when the user changes the language, but I would certainly like to prevent this freeze from happening. The desired behaviour would be that the app restarts once the use changes the app language. I use SwiftUI as the UI framework. I use the following code to open the Settings of my app for the user: UIApplication.shared.open(URL(string: UIApplication.openSettingsURLString)!) How can I achieve that?

I have my app localized for many languages, but I'd like to limit the available app languages to only a subset of those, because the content is not ready for all of them. I don't want to delete localization files, because they contain some useful translations that I will use in the future. The only thing I was able to find and try out is this piece of code: class AppDelegate: NSObject, UIApplicationDelegate {   func application(     _ application: UIApplication,     didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?   ) -> Bool {           UserDefaults.standard.set(["Base", "pl", "de", "ru"], forKey: "AppleLanguages")     UserDefaults.standard.synchronize()           ApplicationDelegate.shared.application(       application,       didFinishLaunchingWithOptions: launchOptions     )     return true   } } but unfortunately it does not work. When I launch Settings of my app, I can still choose from about 20-30 languages that I have already some translations for.

I use AVSpeechSynthesizer to pronounce some text in German. Sometimes it works just fine and sometimes it doesn't for some unknown to me reason (there is no error, because the speak() method doesn't throw and the only thing I am able to observe is the following message logged in the console): _BeginSpeaking: couldn't begin playback I tried to find some API in the AVSpeechSynthesizerDelegate to register a callback when error occurs, but I have found none. The closest match was this (but it appears to be only available for macOS, not iOS): https://developer.apple.com/documentation/appkit/nsspeechsynthesizerdelegate/1448407-speechsynthesizer?changes=_10 Below you can find how I initialize and use the speech synthesizer in my app: class Speaker: NSObject, AVSpeechSynthesizerDelegate {   class func sharedInstance() -> Speaker {     struct Singleton {       static var sharedInstance = Speaker()     }     return Singleton.sharedInstance   }       let audioSession = AVAudioSession.sharedInstance()   let synth = AVSpeechSynthesizer()       override init() {     super.init()     synth.delegate = self   }       func initializeAudioSession() {     do {       try audioSession.setCategory(.playback, mode: .spokenAudio, options: .duckOthers)       try audioSession.setActive(true, options: .notifyOthersOnDeactivation)     } catch {             }   }       func speak(text: String, language: String = "de-DE") { guard !self.synth.isSpeaking else { return }     let utterance = AVSpeechUtterance(string: text)     let voice = AVSpeechSynthesisVoice.speechVoices().filter { $0.language == language }.first!           utterance.voice = voice     self.synth.speak(utterance)   } } The audio session initialization is ran during app started just once. Afterwards, speech is synthesized by running the following code: Speaker.sharedInstance.speak(text: "Lederhosen") The problem is that I have no way of knowing if the speech synthesis succeeded—the UI is showing "speaking" state, but nothing is actually being spoken.

Hi, I am setting up auto-renewable subscriptions for my app. I have set up 4 subscriptions for 1,3,6, and 12 months with a one week free trial. Works like a charm, everything is displayed properly on device, etc. But now I need to take into account multiple cases and one of them is when the user has already consumed the free trial, cancelled the subscription, and then is about to subscribe again. I don't want to present "1 Week Free Trial" on the payment screen and certainly I don't want the user, who has already used the trial, to be eligible to use it again. So the question is if I need 2 sets of subscriptions in total? With Trial: my_app_1_month_trial my_app_3_months_trial my_app_6_months_trial my_app_12_months_trial And without trial: my_app_1_month my_app_3_months my_app_6_months my_app_12_months And then when user has already used the free trial (this piece of information will be either fetched from my server or an apple receipt), I add use the SKProducts from the "without trial" set and the user is charged immediately.