CLLocationManager在iOS9中提供错误的更新

Question

我遇到了CLLocationManager的一些奇怪问题。我的应用程序在位置更新时起作用，当用户移动大约250米时，有一些事情要做。

我必须向用户展示他们彼此之间的距离，因为我需要每隔5米更新一次位置。我有时会收到相距300米到400米的位置更新。这主要发生在我第一次运行应用程序时。但是当爆发中抛出最后一次位置更新时，它有点准确。

我正在检查CLLocation的时间戳和水平准确性，但这无济于事。如何删除这些不需要的位置更新？

    +(instancetype)sharedInstance {
    static id sharedInstance;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        sharedInstance = [[LocationManager alloc]init];
    });
    return sharedInstance;
    }

#pragma mark - Get User Location
    -(void)getUserLocation{
    if (self.locationManager==nil) {
        self.locationManager = [[CLLocationManager alloc] init];
    }
    self.locationManager.delegate = self;
    self.locationManager.distanceFilter = 5;
    self.locationManager.desiredAccuracy = kCLLocationAccuracyBest;
    self.locationManager.allowsBackgroundLocationUpdates = YES;
    self.locationManager.pausesLocationUpdatesAutomatically = YES;
    self.locationManager.activityType = CLActivityTypeAutomotiveNavigation;
    [self.locationManager startMonitoringSignificantLocationChanges];
    if([[UIDevice currentDevice].systemVersion floatValue] >=8.0) {
        // [locationManager requestWhenInUseAuthorization];
        [self.locationManager requestAlwaysAuthorization];
    }
    [self.locationManager startUpdatingLocation];
    }

    -(void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations{

    CLLocation *location = [locations lastObject];

    NSDate* eventDate = location.timestamp;

    NSTimeInterval howRecent = [eventDate timeIntervalSinceNow];

    if (fabs(howRecent) < 5.0 && manager.desiredAccuracy == kCLLocationAccuracyBest && location.horizontalAccuracy<=10) {

        // If the event is recent, do something with it.
        NSLog(@"New Event");
        NSLog(@"latitude %+.6f, longitude %+.6f\n",

              location.coordinate.latitude,

              location.coordinate.longitude);

        [[ParseManagerClass sharedInstance]saveUserLocation:location];

    }else{
        NSLog(@"cached one event");
    }
}