建立進階標記

選取平台： Android iOS JavaScript

使用 GMSAdvancedMarker 子類別建立基本或特定的標記功能，如下所示。做為 GMSMarker 的子類別，GMSAdvancedMarker 會提供更具運算式的標記。

Swift

let camera = GMSCameraPosition( target: coordinate, zoom: 14)
let mapID = GMSMapID(identifier: "YOUR_MAP_ID")
let mapView = GMSMapView(frame: view.bounds, mapID: mapID, camera: camera)

let marker = GMSAdvancedMarker(position: coordinate)
marker.map = mapView

Objective-C

GMSCameraPosition *camera = [GMSCameraPosition cameraWithTarget:kCoordinate zoom:16];
GMSMapID *mapID = [GMSMapID mapIDWithIdentifier:"YOUR_MAP_ID"];

self.mapView = [GMSMapView mapWithFrame:self.view.bounds mapID:mapID camera:camera];

GMSAdvancedMarker *marker = [GMSAdvancedMarker markerWithPosition:kCoordinate];
Marker.map = self.mapView;

注意：進行測試時，您可以在應用程式程式碼中使用 mapId: DEMO_MAP_ID，略過建立及設定地圖 ID 的步驟。DEMO_MAP_ID 僅供測試之用。請勿在正式環境中使用 DEMO_MAP_ID。

移除進階標記

與 GMSMarker 類似，您可以將 GMSAdvancedMarker 的地圖屬性設為 nil，從地圖中移除進階標記。或者，您也可以呼叫 GMSMapView clear 方法，移除地圖上的所有疊加層 (包括進階標記)。

Swift

let camera = GMSCameraPosition.camera(
  withLatitude: -33.8683,
  longitude: 151.2086,
  zoom: 6
)
let mapView = GMSMapView.map(withFrame: .zero, camera: camera)
// ...
mapView.clear()
      

Objective-C

GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:-33.8683
                                                        longitude:151.2086
                                                             zoom:6];
mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];
// ...
[mapView clear];
      

將標記加入地圖後，如要修改標記，請務必保留 GMSAdvancedMarker 物件，You can modify the marker later by making changes to this object.

Swift

let position = CLLocationCoordinate2D(latitude: 10, longitude: 10)
let marker = GMSAdvancedMarker(position: position)
marker.map = mapView
// ...
marker.map = nil

Objective-C

CLLocationCoordinate2D position = CLLocationCoordinate2DMake(10, 10);
GMSAdvancedMarker *marker = [GMSAdvancedMarker markerWithPosition:position];
marker.map = mapView;
// ...
marker.map = nil;

地圖功能

GMSMapView 上的 mapCapabilities 屬性可為地圖專用地圖項目新增程式輔助檢查功能。如想在呼叫特定 API 前，先行知道特定地圖功能是否可用，這項做法就很實用。GMSMapViewDelegate 的 didChangeMapCapabilities 函式也會隨著功能變更而叫用。這個查詢會決定地圖檢視是否支援進階標記。

Swift

// ...

let advancedMarker: GMSAdvancedMarker = {
GMSAdvancedMarker(position: CLLocationCoordinate2D(latitude: 47.6089945, longitude: -122.3410462))
}()

let marker: GMSMarker = {
GMSMarker(position: CLLocationCoordinate2D(latitude: 47.6089945, longitude: -122.3410462))
}()

func addMarker() {
  if mapView.mapCapabilities.contains(.advancedMarkers) {
      advancedMarker.map = mapView
    } else {
      marker.map = mapView
    }
}

extension MapCapabilities: GMSMapViewDelegate {
  func mapView(_ mapView: GMSMapView, didChangeMapCapabilities mapCapabilities: GMSMapCapabilityFlags) {

     let advancedMarkerAvailable = mapCapabilities.contains(.advancedMarkers)

     advancedMarker.map = advancedMarkerAvailable ? mapView : nil
     marker.map = advancedMarkerAvailable ? nil : mapView
  }
}

Objective-C

// ...

_advancedMarker = [GMSAdvancedMarker markerWithPosition:  kSeattleCoordinates];
_fallbackMarker = [GMSMarker markerWithPosition: kSeattleCoordinates];

-   (void)addMarker {

  if (_mapView.mapCapabilities & GMSMapCapabilityFlagsAdvancedMarkers) {
    _advancedMarker.map = _mapView;
    } else {
    _fallbackMarker.map = _mapView;
  }
}

#pragma mark - GMSMapViewDelegate

-   (void)mapView:(GMSMapView *)mapView
    didChangeMapCapabilities:(GMSMapCapabilityFlags)mapCapabilities {
  BOOL advancedMarkersAvailable = mapCapabilities & GMSMapCapabilityFlagsAdvancedMarkers;
  _advancedMarker.map = advancedMarkersAvailable ? _mapView : nil;
  _fallbackMarker.map = advancedMarkersAvailable ? nil : _mapView;
}