Periodic iOS background location updates

Question

I\'m writing an application that requires background location updates with high accuracy and low frequency. The solution seems to be a background NSTimer t

Answer 1

To use standard location services while the application is in the background you need first turn on Background Modes in the Capabilities tab of the Target settings, and select Location updates.

Or, add it directly to the Info.plist.

NSLocationAlwaysUsageDescription
 I want to get your location Information in background
UIBackgroundModes
 location 

Then you need to setup the CLLocationManager

Objective C

//The Location Manager must have a strong reference to it.
_locationManager = [[CLLocationManager alloc] init];
_locationManager.delegate = self;
//Request Always authorization (iOS8+)
if ([_locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]) { [_locationManager requestAlwaysAuthorization];
}
//Allow location updates in the background (iOS9+)
if ([_locationManager respondsToSelector:@selector(allowsBackgroundLocationUpdates)]) { _locationManager.allowsBackgroundLocationUpdates = YES;
}
[_locationManager startUpdatingLocation];

Swift

self.locationManager.delegate = self
if #available (iOS 8.0,*) {
    self.locationManager.requestAlwaysAuthorization()
}
if #available (iOS 9.0,*) {
    self.locationManager.allowsBackgroundLocationUpdates = true
}
self.locationManager.startUpdatingLocation()

Ref:https://medium.com/@javedmultani16/location-service-in-the-background-ios-942c89cd99ba