ios - 位置管理器不会停止更新

Question

这是我的locationUpdate委托(delegate)

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {


    let lastLocation:CLLocation=locations.last!
    let accuracy:CLLocationAccuracy=lastLocation.horizontalAccuracy// the radius of uncertainity location in meters
    print("Received location \(lastLocation) with acccuracy \(accuracy)")
    if (accuracy < 100.0)
    {
        let span:MKCoordinateSpan=MKCoordinateSpanMake(0.14,0.14)
        let region:MKCoordinateRegion=MKCoordinateRegionMake(lastLocation.coordinate, span)
        self.mapview.setRegion(region, animated: true)
        manager.stopUpdatingLocation()
         print("-------LOCATION UPDATE---------")
        self.getLocationData()

    }

我以这种方式在 viewDidLoad 中调用它。

override func viewDidLoad() {
    super.viewDidLoad()
    self.locationManager.delegate=self
    self.locationManager.desiredAccuracy=kCLLocationAccuracyNearestTenMeters
    self.locationManager.requestAlwaysAuthorization()
    self.locationManager.startUpdatingLocation()
}

我的问题是 locationmanager 似乎没有停止更新。我的 getLocationData() 方法触发了 2 次。

Answer 1

if locations.count > 0 {
    manager.stopUpdatingLocation()
}

if (accuracy < 100.0)
{
    let span:MKCoordinateSpan=MKCoordinateSpanMake(0.14,0.14)
    let region:MKCoordinateRegion=MKCoordinateRegionMake(lastLocation.coordinate, span)
    self.mapview.setRegion(region, animated: true)
    print("-------LOCATION UPDATE---------")
    self.getLocationData()

}
else {
    manager.startUpdatingLocation()
}

这样你就可以确保 self.getLocationData() 不会被调用，除非准确度小于 100 并且它会被调用一次