ios - 无法快速显示注释的左附件 View

该代码用于初始化注释的视图，但是右侧的辅助视图在地图中不可见。

func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
    var view = mapView.dequeueReusableAnnotationView(withIdentifier: "Map")


    if view == nil {
        view = MKAnnotationView(annotation: annotation, reuseIdentifier: "Map")
        view?.canShowCallout = true
        let btn = UIButton(type: .detailDisclosure)
        view?.rightCalloutAccessoryView = btn

    }

    view?.annotation = annotation
    return view
}

我不知道问题是什么。

最佳答案

用这个

  func mapView(mapView: MKMapView!, viewForAnnotation annotation: MKAnnotation!) -> MKAnnotationView! {

  if annotation is MKUserLocation {
    return nil
 }

  let reuseId = "AddPin"
  let pinView = mapView.dequeueReusableAnnotationViewWithIdentifier(reuseId) as? MKPinAnnotationView
  if pinView == nil
  {
    pinView = MKPinAnnotationView(annotation: annotation, reuseIdentifier: reuseId)
    pinView!.canShowCallout = true
    pinView!.animatesDrop = true
    pinView!.pinColor = .Red

    pinView!. leftCalloutAccessoryView = UIButton.buttonWithType(.DetailDisclosure) as UIButton
   } else {
    pinView!.annotation = annotation
  }
   return pinView
  }