I am developing an app where I need to update location of device to server approximately accurate, I can afford a difference of 500 | 700 meters in the data.
I am successfully able to achieve it in a background and foreground mode. My main concern is location update when app is terminated, for that I did implemented significant location changes on app terminate but it notify the device for location changes in a random manner and highly inaccurate or there is a huge latency in the location update sometimes I receive location updates in 2-3 Kms and sometime not even in distance of 7 kms.
So one of my team member suggested me to implement region monitoring on app terminate, now I have implemented region monitoring but it is also not working properly and I have read somewhere there can only be maximum of 20 regions that can be monitored from an app.
Here is the below sample code I tried:
import UIKit
import CoreLocation
import XCGLogger
//import SwiftLocation
// MARK: - AppDelegate
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate, CLLocationManagerDelegate
{
var window: UIWindow?
var locationManager: CLLocationManager!
var currentLocation: CLLocationCoordinate2D?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool
{
if launchOptions != nil
{
if (launchOptions![UIApplicationLaunchOptionsLocationKey] != nil)
{
if let location = locationManager.location?.coordinate {
startRegionMonitoring(location)
}
}
}
setupLocalNotifications()
setupLocationManager()
return true
}
func setupLocationManager()
{
if (locationManager == nil)
{
locationManager = CLLocationManager()
locationManager.delegate = self
locationManager.pausesLocationUpdatesAutomatically = false
locationManager.distanceFilter = CLLocationDistance(100.0)
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
if #available(iOS 9.0, *) {
locationManager.allowsBackgroundLocationUpdates = true
}
}
}
func applicationWillTerminate(application: UIApplication)
{
if currentLocation == nil
{
return
}
// create a region around current location and monitor enter/exit
startRegionMonitoring(currentLocation!)
}
func startRegionMonitoring(location: CLLocationCoordinate2D)
{
let region = CLCircularRegion(center: location, radius: 100.0, identifier: "manish")
region.notifyOnExit = true
region.notifyOnEntry = true
locationManager.startMonitoringForRegion(region)
}
// MARK: - Local notifications
func setupLocalNotifications()
{
let settings = UIUserNotificationSettings(forTypes: [.Alert, .Badge, .Sound], categories: nil)
UIApplication.sharedApplication().registerUserNotificationSettings(settings)
}
func showLocalNotification(message: String)
{
let localNotification = UILocalNotification()
localNotification.alertBody = message;
localNotification.fireDate = NSDate(timeIntervalSinceNow: 1.0)
UIApplication.sharedApplication().scheduleLocalNotification(localNotification)
}
}
extension AppDelegate
{
func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus)
{
if status == .AuthorizedAlways {
locationManager.startUpdatingLocation()
}
}
func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation])
{
currentLocation = locations.first?.coordinate
showLocalNotification("didUpdateLocations: \(currentLocation)")
}
func locationManager(manager: CLLocationManager, didEnterRegion region: CLRegion)
{
showLocalNotification("Entered region: \(region.identifier)")
}
func locationManager(manager: CLLocationManager, didExitRegion region: CLRegion)
{
showLocalNotification("Exited region: \(region.identifier)")
if let location = manager.location?.coordinate {
startRegionMonitoring(location)
}
}
}
How can I update location even if the application is terminated? In my above code is anything wrong?
Enable background refresh. You can keep updating location inside your app.
http://solutionowl.com/background-app-refresh-explained-in-laymans-terms/