Core Location in Swift - swift

Question

This is sample code. NSLocationAlwaysUsageDescription key in Info.plist installed. All work fine - program receives the coordinates.... displays them.....
And it continues to update them permanently! In the case of the iOS simulator - it is not critical, but in the case of a real application it is very quickly drain the battery. How to make an application launched Core Location, received location, and got shut down Core Location?
import UIKit
import CoreLocation
class ViewController: UIViewController, CLLocationManagerDelegate {
#IBOutlet var locLabel: UILabel
#IBOutlet var latLabel: UILabel
#IBOutlet var lonLabel: UILabel
var locationManager = CLLocationManager()
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
#IBAction func locButton(sender: AnyObject) {
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
locationManager.requestAlwaysAuthorization()
locationManager.startUpdatingLocation()
}
func locationManager(manager:CLLocationManager, didUpdateLocations locations:AnyObject[]) {
println("locations = \(locationManager)")
var latValue = locationManager.location.coordinate.latitude
var lonValue = locationManager.location.coordinate.longitude
latLabel.text = String(latValue)
lonLabel.text = String(lonValue)
locLabel.text = "success"
}
}

Answer 1

If you are not much concern about high level of accuracy then you should consider startMonitoringSignificantLocationChanges instead of startUpdatingLocation. It will really make a big difference in battery draining.
This method is more appropriate for the majority of applications that just need an initial user location fix and need updates only when the user moves a significant distance. This interface delivers new events only when it detects changes to the device’s associated cell towers, resulting in less frequent updates and significantly lower power usage.
For more detail you can take a look over CLLocationManager Guide