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Questions tagged [background-fetch]

Background fetch is a background execution mode on iOS 7 and newer, used for apps that regularly update their content by contacting a server can register with the system and be launched periodically to retrieve that content in the background.

Background fetch is a background execution mode on iOS 7 and newer, used for apps that regularly update their content by contacting a server can register with the system and be launched periodically to retrieve that content in the background.

Documentation:

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Will performFetchWithCompletionHandler be called if the app has been terminated

It's surprisingly difficult to find a definitive answer to this; couldn't find it mentioned in the Apple documentation and couldn't find a definite yes/no after searching past questions. The question is simple - if the app requests a background…
Gruntcakes
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How to fetch data in background every hour in Swift even the app is terminated?

I am making an app that provides functionality to fetch data every hour. It fetches data even when the app terminates. How can I implement this functionality? After a lot searching I found background fetching using performFetchWithCompletionHandler.…
Jack.Right
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iOS background fetch custom interval

I read all Apple documentation about background fetch and currently I'm using it like this: [[UIApplication sharedApplication] setMinimumBackgroundFetchInterval:minimumBackgroundFetchInterval]; I let OS to decide when to perform background fetch,…
user3251
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Flutter access database in background fetch on Android

I am trying to access the local database on the device while the app is completely closed, to achieve this I am using the sqlite plugin sqflite: ^1.2.0 and the background fetch plugin background_fetch: ^0.4.0. I am able to register the headless…
Billy Mahmood
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iOS: server calls in background often lead to timeout

My app makes some server calls whenever it is started, now I face a weird problem: when a push notification with content_available wakes up my app the calls are made as well, but more often than not they run into a timeout. Does this have to do with…
swalkner
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How often is background fetch executed in iOS?

In iOS 7, a background fetch mode is supported for apps to fetch data when the app is not frontmost: When it is convenient to do so, the system launches or resumes the app in the background and gives it a small amount of time to download any new…
NeoWang
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Send silent push notification to app, update location and send to server in background

I want to send a silent push notification to an application that is in background, then fetch the current user location and send it to a web service. I implemented push notification methods and also those two: - (void)application:(UIApplication…
ytpm
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Does Flutter Background Fetch work on iOS when the app is terminated?

I'm building a Flutter app and need to call a function every day (to schedule some notifications). I came across the flutter_background_fetch package, which seems to be a perfect solution for Android, since the main limitation of the minimum 15…
nhjx
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Flutter Backgroundfetch on iOS doesn't fire

I'm trying to develop an app with flutter that uses the background_fetch package https://pub.dev/packages/background_fetch to connect within a specific time period to a BLE device and receives some status data. On Android, everything works fine and…
A.h.
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I get a warning saying that the completion handler was never called When I simulate a Background fetch

I followed all the steps in order to set up the background fetch but I'm suspecting that I made a mistake when writing the function performFetchWithCompletionHandlerin the AppDelegate. Here is the warning that I get as soon as I simulate a…
AziCode
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Should I call setMinimumBackgroundFetchInterval every time the app restarts?

I developed an app that uses background fetch. I set the minimum interval between updates to minimum: [[UIApplication sharedApplication] setMinimumBackgroundFetchInterval:UIApplicationBackgroundFetchIntervalMinimum]; I thought that this value is…
FreeNickname
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What are the best practices for multiple async requests in background-fetch?

I have an app that can have more than one user account. I need to update all of them in background. The problem is: time is limited (~30 sec but requests may take longer than that) all requests are asynchronous When should I call a completion…
Jarod
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How can I detect my app was launched for background fetch in didFinishLaunchingWithOptions method?

I want to check whether my app was launched for background fetch in my application delegate's didFinishLaunchingWithOptions. There is nothing in launchOptions dictionary. So is there any way to check it? I know that I can check applicationState, but…
tagirkaZ
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iOS background fetch on app launch causes black screen

I have been successfully using background fetch in the iOS app I'm developing, but I've noticed a strange bug that I'm having trouble squashing. The initial symptom was that sometimes when I launched the app, the launch image would show, and then be…
johntvolk
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How to observe photo library changes even when app is closed?

I need to be notified when a photo/video is taken, even when my app is closed. Does anybody know how apps like Google Photos achieve this in iOS? So far, I have implemented and registered PHPhotoLibraryChangeObserver however photoLibraryDidChange…
Daniel Montoya
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