使用 GMSAdvancedMarker
子类创建基本或
具体标记地图项,如下所示。作为
GMSMarker
、GMSAdvancedMarker
为标记提供了
表达式。
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;
移除高级标记
与 GMSMarker
类似,您可以从
方法是设置 GMSAdvancedMarker
的地图属性
发送至 nil
。或者,您也可以移除所有叠加层(包括
(通过调用 GMSMapView
clear
方法在地图上使用标记)。
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];
将标记添加到地图中后,如果您想对标记进行修改,请执行以下操作:
请务必持有 GMSAdvancedMarker
对象。日后您可以通过更改此对象来修改标记。
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;
地图功能
GMSMapView
上的 mapCapabilities
属性将程序化
检查地图专用地图项。如果您想知道
在调用特定 API 之前,特定地图功能可用。通过
didChangeMapCapabilities
函数
GMSMapViewDelegate
也是
在功能发生变化时调用。
此查询用于确定地图视图是否支持高级标记。
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; }