我需要实现每5分钟在后台检测一次iBeacons
的工具,为此,我想使用新的Apple框架BackgroundTask
这是我实现操作子类的方式
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
}
}
如果我从前台使用它,它可以完美工作,然后我尝试从后台使用它,如wwdc演示中所示,它不起作用。我想念吗?我的appdelegate实施
@ UIApplicationMainAppDelegate类: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()
}
}
扩展名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)
}
}
在基于Beacon的项目工作了2年后,我可以说没有办法在您的方案中专门在后台检测iBeacon。
在iOS后台,该任务将在3分钟后终止如果您开始进行后台确定,则可以启动任务,以节省电池。唯一的方法是,在信标测距模式下运行应用程序时,可以每5分钟调用一次线程以确定信标的最后状态,而无需终止应用程序。屏幕可以关闭,但该应用程序仍然可以运行。 但是这不是合法情况。 Apple审核小组不批准您的应用程序为了保护用户的利益。
Beacon Monitoring在后台没有问题,,但您只知道信标信号是否仍连接到设备,或在30秒钟内未连接。
您必须深入了解监视和区域扫描之间的区别。并且,如果在这种情况下未从Background Monitoring应用场景,则无法每隔5分钟使用Beacon Ranging确定后台的信标状态。”>
有关更多信息,请阅读
:https://community.estimote.com/hc/en-us/articles/203914068-Is-it-possible-to-use-beacon-ranging-in-the-background-