地点跟踪器图标未显示在地图上

Question

目前我正在设置位置服务，但由于某些奇怪的原因，跟踪器图标未显示：

我知道它正在工作，因为如果我添加一个引脚，引脚会正确显示：

我不确定为什么跟踪器没有显示，这是代码：

 @IBOutlet weak var map: MKMapView!

  let locationsManager = CLLocationManager()

  override func viewDidLoad() {
    super.viewDidLoad() 

  locationsManager.delegate = self
    locationsManager.desiredAccuracy = kCLLocationAccuracyBest // sets to best location accuracy
    locationsManager.requestWhenInUseAuthorization()// requests user location when app is opened
    locationsManager.startUpdatingLocation()// updates user location


  }

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

    let userLocation: CLLocation = locations[0]

    let latitude: CLLocationDegrees = userLocation.coordinate.latitude
    let longitude: CLLocationDegrees = userLocation.coordinate.longitude

    let latDelta: CLLocationDegrees = 0.05
    let longDelta: CLLocationDegrees = 0.05

    let span: MKCoordinateSpan = MKCoordinateSpanMake(latDelta, longDelta)
    let location: CLLocationCoordinate2D = CLLocationCoordinate2DMake(latitude,longitude)
    let region: MKCoordinateRegion = MKCoordinateRegionMake(location, span)

    map.setRegion(region, animated: true)

    let pin = MKPointAnnotation()
    pin.coordinate.latitude = userLocation.coordinate.latitude
    pin.coordinate.longitude = userLocation.coordinate.longitude
    pin.title = "My current location"
    map.addAnnotation(pin) 
  }

Answer 1

您需要将属性ratio = totalMinWatched / videoTiming fraction = ratio - floor(ratio) percentage = 100 * fraction 设置为true。 https://developer.apple.com/reference/mapkit/mkmapview/1452682-showsuserlocation

Answer 2

MKMapView可以显示用户位置并为您跟踪用户位置：

map.showsUserLocation = true
map.userTrackingMode = .follow

无需实施自己的位置跟踪委托方法。

Answer 3

没关系，明白了。在viewDidload（）中：

map.showsUserLocation = true