Мне нужно реализовать обнаружение iBeacons в фоновом режиме, например, каждые 5 минут, для этого я хочу использовать новую инфраструктуру Apple BackgroundTask
Так я реализую свой подкласс операций
import CoreLocation
class BeaconsRecord: AsyncOperation {
private let locationManager: CLLocationManager
private let clBeaconIdentityConstraint: CLBeaconIdentityConstraint
var beacons = [CLBeacon]()
init (locationManager: CLLocationManager, uuid: UUID) {
self.locationManager = locationManager
self.clBeaconIdentityConstraint = CLBeaconIdentityConstraint(uuid: uuid)
super.init()
}
override func main() {
locationManager.delegate = self
locationManager.startRangingBeacons(satisfying: clBeaconIdentityConstraint)
}
}
extension BeaconsRecord: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didRangeBeacons beacons: [CLBeacon], in region: CLBeaconRegion) {
self.locationManager.stopRangingBeacons(satisfying: clBeaconIdentityConstraint)
self.beacons = beacons
self.state = .Finished
}
}
, если я использую его с переднего плана, он отлично работает, затем я пытаюсь использовать его из фона, как показано в презентации wwd c, он не работает. Что я скучаю? Моя реализация appdelegate
@ UIApplicationMain class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
var locationManager : CLLocationManager?
let uuid = UUID(uuidString: "B9407F30-F5F8-466E-AFF9-25556B57FE6D")!
lazy var detectBeaconsQueue : OperationQueue = {
var queue = OperationQueue()
queue.name = "detectBeaconsQueue"
queue.maxConcurrentOperationCount = 1
return queue
}()
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
locationManager = CLLocationManager()
locationManager?.requestAlwaysAuthorization()
registerBackgroundTaks()
registerLocalNotification()
return true
}
//MARK: Register BackGround Tasks
func registerBackgroundTaks() {
BGTaskScheduler.shared.register(forTaskWithIdentifier: "xxx.xxxxxx.xxxxxxxxxxx", using: nil) { task in
self.scheduleLocalNotification()
self.handleAppRefresh(task: task as! BGAppRefreshTask)
}
}
func applicationDidEnterBackground(_ application: UIApplication) {
cancelAllPendingBGTask()
scheduleAppRefresh()
}
}
расширение AppDelegate {
func cancelAllPendingBGTask() {
BGTaskScheduler.shared.cancelAllTaskRequests()
}
func scheduleAppRefresh() {
let request = BGAppRefreshTaskRequest(identifier: ""xxx.xxxxxx.xxxxxxxxxxx"")
// Fetch no earlier than 1 minutes from now
request.earliestBeginDate = Date(timeIntervalSinceNow: 1 * 60)
do {
try BGTaskScheduler.shared.submit(request)
} catch {
print("Could not schedule app refresh: \(error)")
}
}
func handleAppRefresh(task: BGAppRefreshTask) {
// Schedule a new refresh task
scheduleAppRefresh()
let operation = BeaconsRecord(locationManager: locationManager!,
uuid: uuid)
task.expirationHandler = {
operation.cancel()
}
operation.completionBlock = {
task.setTaskCompleted(success: !operation.isCancelled)
}
detectBeaconsQueue.addOperation(operation)
}
}