Swift 4 locationManager didEnterRegion 在应用程序启动时用户位于区域中时不会触发

Question

我正在尝试检测用户是否在我的应用中进入特定区域。

如果用户在应用启动并进入特定区域时不在特定区域，则此方法工作正常。

但如果应用启动时用户在特定区域，则不会触发 "didEnterRegion" 功能。

这是我的代码：

override func viewDidLoad() {
    super.viewDidLoad()
    self.dbRef = Database.database().reference()
    self.mapView.delegate = self
    self.initLocationManager()
    guard let userLocation = locationManager.location?.coordinate else {return}
    self.userLocation = userLocation
    let region = MKCoordinateRegion(center: userLocation, latitudinalMeters: 1200, longitudinalMeters: 1200)
    mapView.setRegion(region, animated: true)
    self.getPlaces { (places) in
        self.places = places
        self.addAnnotationsToMap(places)
        if(CLLocationManager.authorizationStatus() == .authorizedAlways){
            if CLLocationManager.isMonitoringAvailable(for: CLCircularRegion.self){
                for place in places{
                    self.startMonitoring(place)
                }
            }
        }
    }
}

func startMonitoring(_ place: Place){
    let region = CLCircularRegion(center: place.getCoordinate(), radius: 50, identifier: place.identifier)
    region.notifyOnEntry = true
    region.notifyOnExit = true
    locationManager.startMonitoring(for: region)
}

func locationManager(_ manager: CLLocationManager, didEnterRegion region: CLRegion) {
    print("Entered Region : \(region.identifier)")
}

Answer 1

这是预期的行为，顾名思义，它仅在更广泛的区域交叉时触发。如果要确定用户是在区域内还是区域外，请使用 locationManager.requestState(for region: CLRegion) 然后在委托函数 locationManager(_:didDetermineState:for:)

中接收结果

要查询所有监控区域，请为 locationManager.monitoredRegions 中的每个对象调用 requestState(region)。

Swift 4 locationManager didEnterRegion 在应用程序启动时用户位于区域中时不会触发

Swift 4 locationManager didEnterRegion doesn't fire when user is in region on app launch

core-location

cllocationmanager

ios

swift

clcircularregion