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78 lines
2.3 KiB
Swift
78 lines
2.3 KiB
Swift
/*
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Copyright (C) 2015 Apple Inc. All Rights Reserved.
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See LICENSE.txt for this sample’s licensing information
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Abstract:
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Shows how to retrieve the user's location with an operation.
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*/
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import Foundation
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import CoreLocation
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/**
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`LocationOperation` is an `Operation` subclass to do a "one-shot" request to
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get the user's current location, with a desired accuracy. This operation will
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prompt for `WhenInUse` location authorization, if the app does not already
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have it.
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*/
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class LocationOperation: Operation, CLLocationManagerDelegate {
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// MARK: Properties
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private let accuracy: CLLocationAccuracy
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private var manager: CLLocationManager?
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private let handler: CLLocation -> Void
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// MARK: Initialization
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init(accuracy: CLLocationAccuracy, locationHandler: CLLocation -> Void) {
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self.accuracy = accuracy
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self.handler = locationHandler
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super.init()
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addCondition(LocationCondition(usage: .WhenInUse))
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addCondition(MutuallyExclusive<CLLocationManager>())
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}
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override func execute() {
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dispatch_async(dispatch_get_main_queue()) {
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/*
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`CLLocationManager` needs to be created on a thread with an active
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run loop, so for simplicity we do this on the main queue.
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*/
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let manager = CLLocationManager()
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manager.desiredAccuracy = self.accuracy
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manager.delegate = self
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manager.startUpdatingLocation()
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self.manager = manager
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}
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}
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override func cancel() {
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dispatch_async(dispatch_get_main_queue()) {
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self.stopLocationUpdates()
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super.cancel()
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}
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}
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private func stopLocationUpdates() {
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manager?.stopUpdatingLocation()
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manager = nil
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}
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// MARK: CLLocationManagerDelegate
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func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
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guard let location = locations.last where location.horizontalAccuracy <= accuracy else {
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return
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}
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stopLocationUpdates()
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handler(location)
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finish()
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}
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func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
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stopLocationUpdates()
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finishWithError(error)
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}
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}
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