ios - CLError.DeferredFailed Error (kCLErrorDomain Code=11) Deferred GPS Updates Failing -

i have app periodic location updates map users path.

i using deferred updates.

if (cllocationmanager.deferredlocationupdatesavailable() == true && _isdeferingupdates == false)         {             print("doing refresh")             _isdeferingupdates = true             _locationmanager.allowdeferredlocationupdatesuntiltraveled(c_gps.activity_update_distance, timeout: c_gps.activity_update_time)         } else         {             print("could not refresh")             // iphone 4s not have deferring must keep on             _locationmanager.startupdatinglocation()         } 

when app open "doing refresh" call every second.

my setup:

have 2 keys on plist nslocationwheninuseusagedescription && nslocationalwaysusagedescription

have background modes turned on, remote notifcations , location updates.

have maps setup use bike , pedestrian.

have permissions on phone set yes.

do know other reason why deferred update failing when app goes background?

its never working , apples documentation less helpful

deferredfailed location manager did not enter deferred mode unknown reason. error can occur if gps unavailable, not active, or temporarily interrupted. if error on device has gps hardware, solution try again.

here error handler:

func locationmanager(manager: cllocationmanager, didfinishdeferredupdateswitherror error: nserror?) {     print("finished background update error \(error)")     if (error != nil)     {         print("error valid clerror")          if (error!.code == clerror.locationunknown.rawvalue)         {             print("error: location unknown")         } else if (error!.code == clerror.deferredaccuracytoolow.rawvalue)         {             print("error: accuracy low")         } else if (error!.code == clerror.deferredfailed.rawvalue)         {             print("error: deferring failed")         } else if (error!.code == clerror.denied.rawvalue)         {             print("error: denied")         } else         {             print("error not handled")         }      }     _isdeferingupdates = false } 

ios 9.2, xcode 7.2, arc enabled

the problem associated distance , time interval have chosen deferral. try take advantage of cllocationdistancemaxand cltimeintervalmax troubleshoot function call. example, set distance cllocationdistancemax , vary time interval, try vice versa.

but there other things see might want change...

1. get rid of cllocationmanager.deferredlocationupdatesavailable() == true condition in if statements allow deferred location updates.
2. deferred updates available ios6.0+, iphone 4s can updated ios7.2.1 depending on hardware. not need separately call _locationmanager.startupdatinglocation().
3. make sure if testing in ios9.0+ have allowsbackgroundlocationupdates set location manager.
4. make sure initial _locationmanager.startupdatinglocation() made in - (void)applicationwillresignactive:(uiapplication *)application method equivalent in swift , not in - (void)applicationdidenterbackground:(uiapplication *)application method.
5. make sure calling _locationmanager.allowdeferredlocationupdatesuntiltraveled(c_gps.activity_update_distance, timeout: c_gps.activity_update_time) in equivalent of - (void)locationmanager:(cllocationmanager *)manager didupdatelocations:(nsarray<cllocation *> *)locations method swift.

also, note printing error before check if error exists, might lead incorrect error reporting.

hope helps , not late! cheers.

p.s. if doesn't work, please post more of code, i.e. calling these functions in relation app. delegate *.m file.