background-fetch

i am making app. which providing functionality of fetch data after every one hour. so even when my app terminate how can i call that function? after too much searching i found Background fetching by performFetchWithCompletionHandler but i want to know that this function will work if my app is terminated?what i mean is if my app is in closed or terminated state how can i call function automatically? You can't do anything if your app is in terminated state. Apple is not allowing anything (except receiving notification) in terminated or closed state. You are also restricted for background

I have tried to implement background fetch, to hopefully can wake the app from time to time. I have done these: func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool { application.setMinimumBackgroundFetchInterval(UIApplicationBackgroundFetchIntervalMinimum) return true } func application(_ application: UIApplication, performFetchWithCompletionHandler completionHandler: @escaping (UIBackgroundFetchResult) -> Void) { debugPrint("performFetchWithCompletionHandler") getData() completionHandler

I was hoping that the iOS11 release will fix the silent push issue, which was in the latest betas and GM version of iOS. Currently I'm struggling to understand, why I don't receive any silent push messages, which should actually wake up my app to perform some needed tasks in the background. In iOS 10 I just use the background fetch capability and implemented the 'wake-up-code' in my AppDelegate like the code below. In iOS 11 the registering code is still working fine and my backend is also delivering the push notification to Apples DEV servers (sandbox) and also to the PROD servers (production