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
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PerformFetchWithCompletionHandler called twice when simulating with Xcode
In Xcode 7.0.1 the "simulate background" fetch command causes performFetchWithCompletionHandler to be triggered twice.
Is this an Xcode debugging error, or can this happen on a device running a ...
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How to troubleshoot iOS background app fetch not working?
I am trying to get iOS background app fetch to work in my app. While testing in Xcode it works, when running on the device it doesn't!
My test device is running iOS 9.3.5 (my deployment target is 7....
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31
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1
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expo.io's BackgroundFetch is not running the defined task
I am currently developing an app for iOS with expo sdk-version 32. I have to call a REST service periodically from my app. In order to do that I tried to utilize the new BackgroundFetch API.
Here is ...
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completionHandler of the 2 methods performFetchWitchCompletionHandler AND didReceiveRemoteNotification interfere each other?
I have a iOS (swift) Application available AppStore since November 2017. I added Firebase Analytics and Crashlytics to proactively see issues which didn't occur during development and testing.
I'm ...
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Background Fetch at Specific Time
I am looking for solution to get data in background mode even app is terminated.
There are lots of tutorials and answers available for this questions, but my questions is different than other. I haven'...
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iOS10 Background fetch
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 ...
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Dart Error: Dart_LookupLibrary: library 'package:background_fetch/background_fetch.dart' not found
How can I solve this problem:
E/flutter (18287): [ERROR:flutter/shell/common/shell.cc(89)] Dart Error: Dart_LookupLibrary: library 'package:background_fetch/background_fetch.dart' not found.
E/flutter ...
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iOS Background Transfer - com.apple.nsurlsessiond folder full of tmp files
We've written a media application that allows you to get a list of latest videos as json list using BACKGROUND FETCH
then it uses BACKGROUND TRANSFER to tell iOS to download the video one by one and ...
- 5,307
13
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1
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Keychain sometimes returns empty value [duplicate]
We are using native key-chain wrapper class to store and retrieve values from the key-chain. But in some case the value is getting deleted/empty.
We have the below items enabled in our app
Location ...
12
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2
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Background fetch is not working after killing the app
I'm trying to get data from url with background fetch. My func tries to get data and if there is a new data, it sends local notification. Background fetch works after about 10 - 20 minutes when i ...
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How to run operations in background while an iOS application is in foreground
I have a JSON file populated with strings data in Documents Directory. In user Interface of application there is a UIButton. On button press, a new string appends into the JSON file.
Now I am looking ...
- 243
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Suddenly getting many Fabric Out of Memory sessions: Can Fabric OOM Reports ever be false alarms?
I recently added background fetch in my application and it is working well. I recently noticed in Fabric that the amount of OOM free sessions have gradually gone from 100% to a daily average steady in ...
- 470
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2
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454
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Remote Notification callback not being called during phone call
I have created an app in which background fetch code is written on receiving push notification. I have enabled the background mode in .plist, content-available key is set to 1 in push notification ...
- 269
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What is the different between background task and background fetch correctly?
I am looking at some document on the web about background task and background fetch.
Background task is a task which performance at the background while the app still running. When the app is in the ...
- 8,295
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iOS11 swift silent push (background fetch, didReceiveRemoteNotification) is not working anymore
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 ...
- 854
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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 ...
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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 ...
- 37.1k
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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 ...
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2
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677
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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 ...
- 17.1k
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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 ...
- 18.1k
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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:...
- 1,957
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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, ...
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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 ...
- 5,090
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BGTaskScheduler.shared.register Not Called
I'm using background refresh to schedule local notifications and update my widget.
The problem is that the task registration method isn't called!
func application(_ application: UIApplication, ...
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2
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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 ...
- 495
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1
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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:...
- 7,536
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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 ...
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1
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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 ...
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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 ...
- 2,620
5
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0
answers
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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 ...
- 76
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3
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Background Upload is not working in Swift
I was trying implement a code where a API will be called shortly after a file has been uploaded into AWS server but it must be in background mode. Whereas the AWS sdk manages uploading file into their ...
- 3,672
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1
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Swift background fetch location updates with Core Location
I want to use Background Fetch Location Updates service on my app. But don't show any output my codes here i want your help.
import CoreLocation
class ViewController: UIViewController, ...
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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 ...
4
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1
answer
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Warning: Application delegate received call to -application:performFetchWithCompletionHandler: but the completion handler was never called
I implement the performFetchWithCompletionHandler (ie: background fetch) to download some data from a server.
To do this, inside performFetchWithCompletionHandler, to not block the main thread, i ...
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3
votes
3
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iOS background fetch
I'm little bit confused with background fetch. I read in Apple Developer documentation that fetch happens when OS decides that it should, user can't control background fetch, while on Apple Developer ...
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1
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Flutter WorkManager Background Fetch Example With StateFull Widget
I have a function called control in the StateFull Widget. I want to run this function with WorkManager every 15 minutes.
How can I call the control function from the callbackDispatcher function?
I ...
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4
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3k
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Background Fetch Does Not Appear to Fire
In my app, I have performed the following listed below and have added counter to the app fetch routine to highlight the number of times fetch is called by iOS 8.1.
Turned on Background Modes and ...
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1
answer
855
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Execute a Task after specific time, even if app is in background on iOS using Swift
I have a VPN-Client app that asks the user to pause the connection for 5, 30, and 120 Minutes. The user probably leaves the application to do some work outside of my app in this period, therefore I ...
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1
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Flutter, background fetch package not working, androidx incompatibility
I wanted to make some operations while the app was not running, so I decided to use the background fetch package.I followed the android setup step by step
This is part of my pubspec.yaml
version: 1.0....
3
votes
1
answer
799
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0x8badf00d Crash after listening location on background fetch
In my ios app, I start listening user's location updates in the background for a while (up to 15 mins) when I receive background fetch execution. However, after I stop updates, the app crashes with ...
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Background Fetch iOS - Terminated Apps
I think this might be answered quiet a few time, but still there are some unknown cases that I wanted to clarify.
I have been looking at Background Fetch API for one of my iOS application. I learned ...
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Flutter Fetch API in background when App is terminated
I'm want to fetch API every 15min and check if anything changes. Then if it does send push notification to inform the user about changes. Now my problem is that I cannot get to run the check on IOS. ...
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0
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Background fetch stopped working on ios 13 and newer
If a method is Deprecated, does this mean it will not work in updated systems?
I was using setMinimumBackgroundFetchInterval for background fetch and I believe it stopped working for ios 13 and newer ...
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Expo BackgroundFetch not working on android when app is terminated
The task gets registered it also works.When in recent apps it works.When gets deleted it stops working!
Expo CLI 3.11.3 environment info:
System:
OS: Windows 10
Binaries:
Yarn: 1.21.0 - C:\Users\Steve\...
- 3,088
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0
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OS X Background Fetch Equivalent
I'm familiar with the Background Fetch in UIKit but I was wondering if there is an equivalent for OS X apps.
My application is bundled with a Safari App Extension that needs to update frequently. ...
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0
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Background fetch not executing
iOS is not executing PerformFetch.
I've put the app in the background and just left the device. It's been three days and still PerformFetch is not executed. I know this because I'm using event ...
- 1,163
3
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0
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How to schedule background services while an iOS app is closed?
I am working on an app that keeps people updated with news around a certain event. That means that I don't want to run background fetches all the time. And one more thing, what I understood from Apple'...
- 3,031
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Swift Darwin notifications and background fetch
I have an app which is set up to use background fetch, remote notifications and push notifications (and app groups).
I have the app working so that on receipt of a push notification, it will wake up ...
- 6,495
3
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0
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iOS How to notify when a new photo added to photo album
I have a requirement to send an email whenever a new photo added to the photo album, similar stuff done by IFTTT app, but not getting any clue for where to start and how to proceed.
I am not sure ...
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Will background fetch be called when app is in background?
Will iOS call performFetchWithCompletionHandler for the running app that is taken to background (using Home button)?
I thought it is only called when iOS launches my app to do background fetch.
If ...
- 2,863