Send the location to the server every n minutes in the background in swift - ios

Question

i want to sent the location to the server when the app is background, i tried with many way but can't get the solution
I tried with the timer function using the timer and using function
self.bgtimer = Timer.scheduledTimer(timeInterval:60, target: self, selector: #selector(AppDelegate.bgtimer(_:)), userInfo: nil, repeats: true)
RunLoop.current.add(self.bgtimer, forMode: RunLoopMode.defaultRunLoopMode)
RunLoop.current.run()
but i when i stop the timer when the app becomes active
if UIApplication.shared.applicationState == .active {
RunLoop.current.cancelPerformSelectors(withTarget: self.bgtimer)
timer.invalidate()
}
but the app not function properly collection view and back function everything is not working properly

Answer 1

In DidBackground:
stop normalTimer.
start New backgroundTaskTimer
In WillForeground:
stop backgroundTaskTimer.
start normalTimer
Find below sample code:
In Appdelegate:
Declaration:
var backgroundUpdateTask: UIBackgroundTaskIdentifier!
var backgroundTaskTimer:Timer! = Timer()
Implementation:
func doBackgroundTask() {
DispatchQueue.global(qos: .default).async {
self.beginBackgroundTask()
if self.backgroundTaskTimer != nil {
self.backgroundTaskTimer.invalidate()
self.backgroundTaskTimer = nil
}
//Making the app to run in background forever by calling the API
self.backgroundTaskTimer = Timer.scheduledTimer(timeInterval: 10, target: self, selector: #selector(self.startTracking), userInfo: nil, repeats: true)
RunLoop.current.add(self.backgroundTaskTimer, forMode: RunLoopMode.defaultRunLoopMode)
RunLoop.current.run()
// End the background task.
self.endBackgroundTask()
}
}
func beginBackgroundTask() {
self.backgroundUpdateTask = UIApplication.shared.beginBackgroundTask(withName: "Track trip", expirationHandler: {
self.endBackgroundTask()
})
}
func endBackgroundTask() {
UIApplication.shared.endBackgroundTask(self.backgroundUpdateTask)
self.backgroundUpdateTask = UIBackgroundTaskInvalid
}
In ApplicationDidEnterBackground:
func applicationDidEnterBackground(_ application: UIApplication) {
//Start the background fetch
self.doBackgroundTask()
}
In ApplicationWillEnterForeground:
func applicationWillEnterForeground(_ application: UIApplication) {
if self.backgroundTaskTimer != nil {
self.backgroundTaskTimer.invalidate()
self.backgroundTaskTimer = nil
}
}