ios - How to keep Core Location and Core Bluetooth running when app is not running (killed/ terminated)? -

i got stuck when trying keep function running if terminate app.

is possible keep core location (geofencing / geolocating) , core bluetooth running when app not running ? if possible how solve issue? check background modes, , implement core location method. code :

    class appdelegate: uiresponder, uiapplicationdelegate, cllocationmanagerdelegate {          var viewcontroller = viewcontroller()         var window: uiwindow?          var locationmanager = cllocationmanager()          func application(_ application: uiapplication, didfinishlaunchingwithoptions launchoptions: [uiapplicationlaunchoptionskey: any]?) -> bool {              locationmanager = cllocationmanager()             locationmanager.requestalwaysauthorization()              locationmanager.delegate = self             locationmanager.distancefilter = kcldistancefilternone             locationmanager.desiredaccuracy = kcllocationaccuracybest              locationmanager.pauseslocationupdatesautomatically = false              if #available(ios 9.0, *) {                 locationmanager.allowsbackgroundlocationupdates = true             }              beaconregion.notifyentrystateondisplay = true             beaconregion.notifyonentry = true             beaconregion.notifyonexit = true              locationmanager.startmonitoring(for: beaconregion)             locationmanager.stoprangingbeacons(in: beaconregion)             locationmanager.startrangingbeacons(in: beaconregion)             locationmanager.startupdatinglocation()              return true         }          func locationmanager(_ manager: cllocationmanager, didenterregion region: clregion) {             if (region.identifier == beaconregionidentifier) {                 manager.requeststate(for: region)                 gobackground()             }         }          func locationmanager(_ manager: cllocationmanager, didexitregion region: clregion) {             print("you exited region")         }          func locationmanager(_ manager: cllocationmanager, diddeterminestate state: clregionstate, region: clregion) {             if (region.identifier == beaconregionidentifier) {                 manager.stopupdatinglocation()                  switch state {                 case .inside:                     manager.startrangingbeacons(in: region as! clbeaconregion)                     manager.startupdatinglocation()                 case .outside:                     let delay = dispatchtime.now() + .seconds(3)                     dispatchqueue.main.asyncafter(deadline: delay) {                         manager.requeststate(for: region)                     }                 case .unknown:                     let delay = dispatchtime.now() + .seconds(3)                     dispatchqueue.main.asyncafter(deadline: delay) {                         manager.requeststate(for: region)                     }                 }             }         }          func locationmanager(_ manager: cllocationmanager, didrangebeacons beacons: [clbeacon], in region: clbeaconregion) {              let state = uiapplication.shared.applicationstate             switch(state){             case.active,                 .inactive,                 .background:                  let mainview = userdefaults.standard.bool(forkey: "tomainview")                  var iswakeuprunning = userdefaults.standard.bool(forkey: "iswakeuprunning")                  if iswakeuprunning {                     if mainview {                         abeacon in beacons{                             if abeacon.rssi > wake_up_threshold   && abeacon.rssi != 0{                                 userdefaults.standard.set(false, forkey: "iswakeuprunning")                                 self.viewcontroller.startfunction()                                 manager.stoprangingbeacons(in: region)                             }else if abeacon.rssi != 0 && abeacon.rssi < wake_up_threshold {                                 manager.stoprangingbeacons(in: region)                                 manager.requeststate(for: region)                             }                         }                     }                 }else{                     manager.stoprangingbeacons(in: region)                     manager.requeststate(for: region)                 }             }         }     func gobackground() {         let app = uiapplication.shared         var bgtask: uibackgroundtaskidentifier = 0         bgtask = app.beginbackgroundtask(expirationhandler: {             nslog("expired: %lu", bgtask)             app.endbackgroundtask(bgtask)         })         nslog("background: %lu", bgtask) }      } 

from code, can run in both in foreground , background. when swipe app task switcher, cannot work. , cannot see log xcode. ideas me ?

once swipe app task switcher app killed, corelocation still working @ os level, looking beacons match region:

locationmanager.startmonitoring(for: beaconregion) 

once there change on region (either didenter or didexit), app re-launched background. @ time following methods called in order:

1. application(_ application: uiapplication, didfinishlaunchingwithoptions launchoptions: [uiapplicationlaunchoptionskey: any]?)

2. locationmanager(_ manager: cllocationmanager, didenterregion region: clregion)

at time app continue running in background. because app starts background task, continue 180 seconds before being suspended.

however, app not run between time swiped off screen , when next region transition happens. best can do.