ARKit & CoreLocation + Getting Nearby POIs

nearby_pois.swift

var locationManager: CLLocationManager!
var latestLocation: CLLocation?
var pois: [PointOfInterest]!

func getPOIs() {

    // formulate natural language query for nearby POIs
    let request = MKLocalSearch.Request()
    request.naturalLanguageQuery = "Restaurants" // or any other thing you might be interested in
    request.region = MKCoordinateRegion(center: (latestLocation?.coordinate)!,
                                        latitudinalMeters: 2000,
                                        longitudinalMeters: 2000)

    // getting POIs
    let search = MKLocalSearch(request: request)
    search.start {
        (response, error) in

        guard let response = response else {
            if let error = error {
                print("Search error: \(error)")
                // TODO: handle error
            }
            return
        }

        // add POIs to AR scene
        self.pois = []
        for item in response.mapItems {
            let location = CLLocation(coordinate: item.placemark.coordinate, altitude: 0)
            let distance = Int( round( self.latestLocation!.distance(from: location) ))
            let title = "\(item.placemark.name!)\n\(distance) m"

            let poi = PointOfInterest(title: title,
                                      latitude: location.coordinate.latitude,
                                      longitude: location.coordinate.longitude,
                                      altitude: location.altitude)
            self.pois.append(poi)
            self.addPOIToARScene(poi)
        }
    }
}