iOS 11 集群成员

Question

当点击地图上的集群注释时，我试图获取集群的所有成员（iOS 11）。有谁知道怎么获得吗？

以下代码添加了集群：

    func mapView(_ mapView: MKMapView, viewFor annotation: MKAnnotation) -> MKAnnotationView? {
        if #available(iOS 11.0, *) {
            if annotation is MKClusterAnnotation {
                var anView = mapView.dequeueReusableAnnotationView(withIdentifier: "cluster")
                return anView
            }
        }
    }

当点击集群时无法获得集群成员

func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
    if #available(iOS 11.0, *) {
        if view.annotation is MKClusterAnnotation {
            print(view.clusteringIdentifier)
            print(view.reuseIdentifier)

            //*** Need array list of annotation inside cluster here ***
         } else {

         }
     }
}

获取集群成员的唯一方法是：

func mapView(_ mapView: MKMapView, clusterAnnotationForMemberAnnotations memberAnnotations: [MKAnnotation]) -> MKClusterAnnotation {

    print(memberAnnotations)

    return MKClusterAnnotation(memberAnnotations: memberAnnotations)
}

但无法确定哪一个是正确的抽头集群

Answer 1

集群有一个“memberAnnotations”属性：

func mapView(_ mapView: MKMapView, didSelect view: MKAnnotationView) {
  if #available(iOS 11.0, *) {
    if let cluster = view.annotation as? MKClusterAnnotation {
      //*** Need array list of annotation inside cluster here ***
      let arrayList = cluster.memberAnnotations

      // If you want the map to display the cluster members
      mapView.showAnnotations(cluster.memberAnnotations, animated: true)

    }
  }
}