When I write code for a timer like below, the timer doesn't fire if the device is locked. How do I cause the code in the timer closure to run when the app is in the background? Are there any other ways to cause specific code to run at a certain time when the app is in the background? func setTimer(alarm: UTIAlarm) { let timer = Timer(fire: alarm.date!, interval: 0, repeats: false) { (timer: Timer) in print("timer fire \(self.dateFormatter.string(from: alarm.date!))") do { try AVAudioSession.sharedInstance().setActive(true, options: .notifyOthersOnDeactivation) } catch { print("Failed to setActive AVAudioSession from timer closure.") print(error.localizedDescription) } let predicate = MPMediaPropertyPredicate(value: alarm.mediaItem!.title, forProperty: MPMediaItemPropertyTitle) let query = MPMediaQuery() query.addFilterPredicate(predicate) self.playerController!.setQueue(with: query) self.playerController!.play() } runLoop.add(timer, forMode: .default) timers.append(timer) }

I'm getting the following error messages:CoreData: annotation: Failed to load optimized model at path '/var/containers/Bundle/Application/0E3DF5FB-DA57-4A63-98FE-59E2961C6F50/Routes.app/GoogleMaps.bundle/GMSCacheStorage.momd/StorageWithTileProto.omo'2020-01-11 17:19:50.885657-0600 Routes[1913:394464] [error] fault: One or more models in this application are using transformable properties with transformer names that are either unset, or set to NSKeyedUnarchiveFromDataTransformerName. Please switch to using "NSSecureUnarchiveFromData" or a subclass of NSSecureUnarchiveFromDataTransformer instead. At some point, Core Data will default to using "NSSecureUnarchiveFromData" when nil is specified, and transformable properties containing classes that do not support NSSecureCoding will become unreadable.. . .CoreData: warning: Property 'value' on Entity 'GMSCacheProperty' is using nil or an insecure NSValueTransformer. Please switch to using "NSSecureUnarchiveFromData" or a subclass of NSSecureUnarchiveFromDataTransformer instead.. . .2020-01-11 17:20:08.491131-0600 Routes[1913:394093] Can't end BackgroundTask: no background task exists with identifier 13 (0xd), or it may have already been ended. Break in UIApplicationEndBackgroundTaskError() to debug.I don't know what the problem is because I am not using any CoreData Attributes of type Transformable nor is there any code in my project about anything transformable. I have searched with Google for this error, but have not found a solution that works.

In Info.plist of my Xcode project, I see for instance "Executable file" is set to "$(EXECUTABLE_NAME)". I believe that "$(EXECUTABLE_NAME)" is called an environment variable. What I'd like to know is where is that environment variable set. I'd like to see where all the environment variables are set so I can use those values.