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我正在尝试检测用户是否正在我的应用程序中输入特定区域。

如果应用程序启动然后进入该区域时用户不在特定区域,则此方法可以正常工作。

但如果用户在应用启动时处于特定区域,则不会触发“didEnterRegion”函数。

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)")
}
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1 回答 1

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这是预期的行为,顾名思义,它仅在区域更广泛的交叉处触发。如果要确定用户是在区域内还是在区域外使用locationManager.requestState(for region: CLRegion),则在委托函数中接收结果locationManager(_:didDetermineState:for:)

要查询所有受监控的区域,请requestState(region)调用locationManager.monitoredRegions.

于 2018-12-01T16:26:29.747 回答