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How to keep receiving the data when app is sent to background mode?

How to change the name of an iOS app?How can I make a UITextField move up when the keyboard is present - on starting to edit?How do I get a background location update every n minutes in my iOS application?What happens if the user closes an app that is already in the background?Executing code while in background audio modeStarting audio streaming from a BLE event when in the backgroundWhy backgroundTimeRemaining gives DBL_MAX even if application state is UIApplicationStateBackground?my app media play in background mode didn't play if once I open apple music appiOS keep app living in the backgroundMultipeer Connectivity in background mode

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2

1

In iOS12 apple started canceling network requests if they are not URLSessionDownloadTask and setup with background session.

But according to the apple website:

You don’t have to do all background network activity with background
sessions... Apps that declare appropriate
background modes can use default URL sessions and data tasks, just as
if they were in the foreground

I'm streaming media file with a custom player, application has Audio and Background Fetch modes enabled. URLSessionDataTask is initialized in foreground as soon as app enters background state task is canceled.

I'm aware that AVPlayer can stream in the background but using AVPlayer is not an option.

I'm aware that I can setup session with URLSessionDownloadTask which will download data in separate process and return path to file, which is not an option due the the streaming requirement.

I'm aware that I can request additional background execution time with UIApplication.shared.beginBackgroundTask but it's not acceptable solution because if backgroundTimeRemaining expires before stream finished app will be killed.

Is there any way to keep receiving data when app is in the background mode?

ios

share|improve this question

edited Mar 28 at 21:54

rmaddy

261k2929 gold badges358358 silver badges421421 bronze badges

asked Mar 28 at 15:51

DigitechDigitech

18288 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Are you 100% sure that your “custom player” is keeping the app running in the background and that the app isn’t being suspended?
  
  – Rob
  Mar 28 at 16:43
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  yes. It plays for as long as there data in the buffer, after that it stops.
  
  – Digitech
  Mar 28 at 18:25
  

  
  
  
  

add a comment
 | 

2

1

In iOS12 apple started canceling network requests if they are not URLSessionDownloadTask and setup with background session.

But according to the apple website:

You don’t have to do all background network activity with background
sessions... Apps that declare appropriate
background modes can use default URL sessions and data tasks, just as
if they were in the foreground

I'm streaming media file with a custom player, application has Audio and Background Fetch modes enabled. URLSessionDataTask is initialized in foreground as soon as app enters background state task is canceled.

I'm aware that AVPlayer can stream in the background but using AVPlayer is not an option.

I'm aware that I can setup session with URLSessionDownloadTask which will download data in separate process and return path to file, which is not an option due the the streaming requirement.

I'm aware that I can request additional background execution time with UIApplication.shared.beginBackgroundTask but it's not acceptable solution because if backgroundTimeRemaining expires before stream finished app will be killed.

Is there any way to keep receiving data when app is in the background mode?

ios

share|improve this question

edited Mar 28 at 21:54

rmaddy

261k2929 gold badges358358 silver badges421421 bronze badges

asked Mar 28 at 15:51

DigitechDigitech

18288 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Are you 100% sure that your “custom player” is keeping the app running in the background and that the app isn’t being suspended?
  
  – Rob
  Mar 28 at 16:43
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  yes. It plays for as long as there data in the buffer, after that it stops.
  
  – Digitech
  Mar 28 at 18:25
  

  
  
  
  

add a comment
 | 

In iOS12 apple started canceling network requests if they are not URLSessionDownloadTask and setup with background session.

But according to the apple website:

You don’t have to do all background network activity with background
sessions... Apps that declare appropriate
background modes can use default URL sessions and data tasks, just as
if they were in the foreground

I'm streaming media file with a custom player, application has Audio and Background Fetch modes enabled. URLSessionDataTask is initialized in foreground as soon as app enters background state task is canceled.

I'm aware that AVPlayer can stream in the background but using AVPlayer is not an option.

I'm aware that I can setup session with URLSessionDownloadTask which will download data in separate process and return path to file, which is not an option due the the streaming requirement.

I'm aware that I can request additional background execution time with UIApplication.shared.beginBackgroundTask but it's not acceptable solution because if backgroundTimeRemaining expires before stream finished app will be killed.

Is there any way to keep receiving data when app is in the background mode?

ios

share|improve this question

edited Mar 28 at 21:54

rmaddy

261k2929 gold badges358358 silver badges421421 bronze badges

asked Mar 28 at 15:51

DigitechDigitech

18288 bronze badges

share|improve this question

edited Mar 28 at 21:54

rmaddy

261k2929 gold badges358358 silver badges421421 bronze badges

asked Mar 28 at 15:51

DigitechDigitech

18288 bronze badges

share|improve this question

edited Mar 28 at 21:54

rmaddy

261k2929 gold badges358358 silver badges421421 bronze badges

asked Mar 28 at 15:51

DigitechDigitech

18288 bronze badges

edited Mar 28 at 21:54

rmaddy

261k2929 gold badges358358 silver badges421421 bronze badges

edited Mar 28 at 21:54

rmaddy

261k2929 gold badges358358 silver badges421421 bronze badges

asked Mar 28 at 15:51

DigitechDigitech

18288 bronze badges

asked Mar 28 at 15:51

DigitechDigitech

18288 bronze badges

1 Answer
1

active

oldest

votes

0

Make sure your background session has shouldUseExtendedBackgroundIdleMode enabled. If you don’t, the session will stop data tasks when the app transitions from foreground execution to background execution. Or, as that Downloading Files in the Background document says, you can use default session configurations, too, which don’t exhibit this behavior.

---

FWIW, when using AVPlayer, in addition to enabling background audio capability ...

... you may also have to tell the shared audio session instance that it’s active:

try AVAudioSession.sharedInstance().setCategory(.playback)
try AVAudioSession.sharedInstance().setActive(true)

I can’t say what your “custom player” requires, but for me I had to do both of these to keep the app running in the background, playing audio, with AVPlayer.

share|improve this answer

answered Mar 28 at 23:38

RobRob

322k5353 gold badges604604 silver badges780780 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Tested with shouldUseExtendedBackgroundIdleMode set to true, it keeps connection alive while app in the background state (but it looks like download is paused), as soon as device is locked connection is cancelled. I'm aware that when using AVPlayer system keeps connection alive, I'm suspecting that AVPlayer has special permissions. Here is the link to test project, if you'd like to check project setup / see described behavior. dropbox.com/s/iljpunkkzi47t4l/DataTaskExample.zip
  
  – Digitech
  Mar 31 at 4:30
  

  
  
  
  

add a comment
 | 

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0

Make sure your background session has shouldUseExtendedBackgroundIdleMode enabled. If you don’t, the session will stop data tasks when the app transitions from foreground execution to background execution. Or, as that Downloading Files in the Background document says, you can use default session configurations, too, which don’t exhibit this behavior.

---

FWIW, when using AVPlayer, in addition to enabling background audio capability ...

... you may also have to tell the shared audio session instance that it’s active:

try AVAudioSession.sharedInstance().setCategory(.playback)
try AVAudioSession.sharedInstance().setActive(true)

I can’t say what your “custom player” requires, but for me I had to do both of these to keep the app running in the background, playing audio, with AVPlayer.

share|improve this answer

answered Mar 28 at 23:38

RobRob

322k5353 gold badges604604 silver badges780780 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Tested with shouldUseExtendedBackgroundIdleMode set to true, it keeps connection alive while app in the background state (but it looks like download is paused), as soon as device is locked connection is cancelled. I'm aware that when using AVPlayer system keeps connection alive, I'm suspecting that AVPlayer has special permissions. Here is the link to test project, if you'd like to check project setup / see described behavior. dropbox.com/s/iljpunkkzi47t4l/DataTaskExample.zip
  
  – Digitech
  Mar 31 at 4:30
  

  
  
  
  

add a comment
 | 

0

Make sure your background session has shouldUseExtendedBackgroundIdleMode enabled. If you don’t, the session will stop data tasks when the app transitions from foreground execution to background execution. Or, as that Downloading Files in the Background document says, you can use default session configurations, too, which don’t exhibit this behavior.

---

FWIW, when using AVPlayer, in addition to enabling background audio capability ...

... you may also have to tell the shared audio session instance that it’s active:

try AVAudioSession.sharedInstance().setCategory(.playback)
try AVAudioSession.sharedInstance().setActive(true)

I can’t say what your “custom player” requires, but for me I had to do both of these to keep the app running in the background, playing audio, with AVPlayer.

share|improve this answer

answered Mar 28 at 23:38

RobRob

322k5353 gold badges604604 silver badges780780 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Tested with shouldUseExtendedBackgroundIdleMode set to true, it keeps connection alive while app in the background state (but it looks like download is paused), as soon as device is locked connection is cancelled. I'm aware that when using AVPlayer system keeps connection alive, I'm suspecting that AVPlayer has special permissions. Here is the link to test project, if you'd like to check project setup / see described behavior. dropbox.com/s/iljpunkkzi47t4l/DataTaskExample.zip
  
  – Digitech
  Mar 31 at 4:30
  

  
  
  
  

add a comment
 | 

Make sure your background session has shouldUseExtendedBackgroundIdleMode enabled. If you don’t, the session will stop data tasks when the app transitions from foreground execution to background execution. Or, as that Downloading Files in the Background document says, you can use default session configurations, too, which don’t exhibit this behavior.

---

FWIW, when using AVPlayer, in addition to enabling background audio capability ...

... you may also have to tell the shared audio session instance that it’s active:

try AVAudioSession.sharedInstance().setCategory(.playback)
try AVAudioSession.sharedInstance().setActive(true)

I can’t say what your “custom player” requires, but for me I had to do both of these to keep the app running in the background, playing audio, with AVPlayer.

share|improve this answer

answered Mar 28 at 23:38

RobRob

322k5353 gold badges604604 silver badges780780 bronze badges

try AVAudioSession.sharedInstance().setCategory(.playback)
try AVAudioSession.sharedInstance().setActive(true)

share|improve this answer

answered Mar 28 at 23:38

RobRob

322k5353 gold badges604604 silver badges780780 bronze badges

answered Mar 28 at 23:38

RobRob

322k5353 gold badges604604 silver badges780780 bronze badges

answered Mar 28 at 23:38

RobRob

322k5353 gold badges604604 silver badges780780 bronze badges