how to send the locations to the server continuously for 5 hours when the application is in background mode ? - background

Question

I am making an app in which I have to send the locations to the server on an Api call . It can work in the background also . I have implemented the code for this , but when I came back from background . My current work is not resuming . It is going just to the dashboard page , not backing to the page which is in the background .
Here is my code in the appdelegate
func applicationWillEnterForeground(_ application: UIApplication) {
if !isComingFromTrip {
locationManager.stopUpdatingLocation()
}
locationStarted = false
}
func applicationDidEnterBackground(_ application: UIApplication) {
if isComingFromTrip {
if UIApplication.shared.applicationState == .background {
print("start backgroun tracking from appdelegate")
locationManager.startUpdatingLocation()
}
//change locationManager status after time
self.runBackgroundTask(20)
} else {
isComingFromTrip = false
}
FIRMessaging.messaging().disconnect()
print("Disconnected from FCM.")
}
func runBackgroundTask(_ time: Int) -> Void {
if UIApplication.shared.applicationState == .background {
//create UIBackgroundTaskIdentifier and create tackground task, which starts after time
backgroundUpdateTask = app.beginBackgroundTask(expirationHandler: {() -> Void in
self.app.endBackgroundTask(self.backgroundUpdateTask)
self.backgroundUpdateTask = UIBackgroundTaskInvalid
})
DispatchQueue.global(qos: .default).async(execute: {() -> Void in
var t = Timer.scheduledTimer(timeInterval: TimeInterval(time), target: self, selector: #selector(self.startTrackingBg), userInfo: nil, repeats: false)
RunLoop.current.add(t, forMode: RunLoopMode.defaultRunLoopMode)
RunLoop.current.run()
})
}
}
func startTrackingBg() {
//write background time remaining
print(String(format: "backgroundTimeRemaining: %.0f", UIApplication.shared.backgroundTimeRemaining))
//set default time
var time: Int = 60
//if locationManager is ON
if locationStarted == true {
//stop update location
locationManager.stopUpdatingLocation()
locationStarted = false
}
else {
//start updating location
locationManager.startUpdatingLocation()
locationStarted = true
//Time how long the application will update your location
time = 5
}
self.runBackgroundTask(time)
}
func StartupdateLocation() {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.distanceFilter = kCLDistanceFilterNone
locationManager.requestAlwaysAuthorization()
if #available(iOS 9.0, *) {
locationManager.allowsBackgroundLocationUpdates = true
} else {
// Fallback on earlier versions
}
locationManager.pausesLocationUpdatesAutomatically = false
locationManager.startUpdatingLocation()
}
I have enabled the background mode also Target->Capabilities-> Location
and also added key for this .