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マップに注釈を追加すると、それらが時々表示されることがあります。彼らは同じ家にいる場合は、1つは表示されません言うことができます。どのように私はそれらの両方を表示させるのですか？カスタムアノテーションクラスを作成する必要がありますか？ ios11には機能が集中していると聞きましたが、それを使用する必要がありますか？ここでは、コード（要約し）です：MKAnnotationViewにios11 MKAnnotationが両方の注釈を表示していません
import UIKit
import MapKit
import Firebase
class GameViewController: UIViewController {
@IBOutlet weak var mapView: MKMapView!
fileprivate var locations = [CLLocation]()
fileprivate var userLocations = [(loc: CLLocation, name: String, team: String)]()
fileprivate var userAnnotations = [MKAnnotation]()
fileprivate var hasBeenUP = false
var ref: FIRDatabaseReference!
let uid = FIRAuth.auth()!.currentUser!.uid
var timer = Timer()
var timeLeft = 0.0
var firstTimer = Timer()
var name = ""
var team = ""
override func viewDidLoad() {
super.viewDidLoad()
let center = CLLocationCoordinate2D(latitude: 47.786769, longitude: -20.413634)
let region = MKCoordinateRegion(center: center, span: MKCoordinateSpan(latitudeDelta: 0.01, longitudeDelta: 0.01))
self.mapView.setRegion(region, animated: true)
mapView.mapType = .hybrid
locationManager.startUpdatingLocation()
ref = FIRDatabase.database().reference()
setupULSending()
getMetaInfo()
ref.child("realtimeLocations").observe(FIRDataEventType.value, with: { (snapshot) in
self.userLocations = []
for rest in snapshot.children.allObjects as! [FIRDataSnapshot] {
guard let snapshotValue = snapshot.value as? NSDictionary, let snapVal = snapshotValue[rest.key] as? NSDictionary else {
break
}
let name = snapVal["name"] as! String
let team = snapVal["team"] as? String ?? ""
if let lat = snapVal["lat"] as? Double,
let long = snapVal["long"] as? Double {
let location = CLLocation(latitude: lat, longitude: long)
self.userLocations.append((loc: location, name: name, team: team))
}else {
}
}
DispatchQueue.main.async {
self.updateUserLocation()
}
})
}
private lazy var locationManager: CLLocationManager = {
let manager = CLLocationManager()
manager.allowsBackgroundLocationUpdates = true
manager.desiredAccuracy = kCLLocationAccuracyBest
manager.delegate = self
manager.requestAlwaysAuthorization()
return manager
}()
func updateUserLocation() {
for an in self.mapView.annotations {
mapView.removeAnnotation(an)
}
for loc in userLocations {
let annotation = MKPointAnnotation()
annotation.coordinate = loc.loc.coordinate
annotation.title = loc.name
annotation.subtitle = "local"
mapView.addAnnotation(annotation)
}
}
}
// MARK: - CLLocationManagerDelegate
extension GameViewController: CLLocationManagerDelegate {
func locationManager(_ manager: CLLocationManager, didUpdateLocations
locations: [CLLocation]) {
let location = locations.last as! CLLocation
self.locations.append(location)
}
}