商家和其他地图注点

请选择平台： Android iOS JavaScript

默认情况下，地图注点 (POI) 将与对应的图标一起显示在基本地图上。地图注点包括公园、学校、政府大楼等等。此外，如果地图类型为 kGMSTypeNormal，商家地图注点默认将显示在地图上。商家地图注点表示商店、餐馆和酒店之类的商家。

根据 Places SDK for iOS 的定义，一个地图注点对应一个地点 ID。例如，休闲公园为地图注点，但喷泉等地点通常不属于地图注点（除非它们具有国家/地区或历史意义）。

监听地图注点上的点击事件

如果您想对用户点按某个地图注点的操作作出响应，请实现 GMSMapViewDelegate，然后实现 mapView(_:didTapPOIWithPlaceID:name:location:) 方法，如以下示例所示：

Swift

import GoogleMaps

class POI: UIViewController, GMSMapViewDelegate {

  override func loadView() {
    let camera = GMSCameraPosition.camera(
      withLatitude: 47.603,
      longitude:-122.331,
      zoom:14
    )
    let mapView = GMSMapView.map(withFrame: .zero, camera: camera)
    mapView.delegate = self
    self.view = mapView
  }

  func mapView(
    _ mapView: GMSMapView,
    didTapPOIWithPlaceID placeID: String,
    name: String,
    location: CLLocationCoordinate2D
  ) {
    print("You tapped \(name): \(placeID), \(location.latitude)/\(location.longitude)")
  }
}

Objective-C

#import "POI.h"
@import GoogleMaps;

@interface POI () <GMSMapViewDelegate>

@end

@implementation POI

- (void)loadView {
  GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:47.603
                                                            longitude:-122.331
                                                                 zoom:14];
  GMSMapView *mapView = [GMSMapView mapWithFrame:CGRectZero camera:camera];
  mapView.delegate = self;
  self.view = mapView;
}

#pragma mark - GMSMapViewDelegate

- (void)mapView:(GMSMapView *)mapView
    didTapPOIWithPlaceID:(NSString *)placeID
                    name:(NSString *)name
                location:(CLLocationCoordinate2D)location {
  NSLog(@"You tapped %@: %@, %f/%f", name, placeID, location.latitude, location.longitude);
}

@end

在信息窗口中显示详细信息

地图注点会默认显示在地图上，但是没有默认的点击界面（用户点击地图注点时，API 不会自动显示信息窗口或任何其他界面）。以下示例展示了如何使用标记为地图注点显示信息窗口：

Swift

// Declare GMSMarker instance at the class level.
let infoMarker = GMSMarker()

// Attach an info window to the POI using the GMSMarker.
func mapView(
  _ mapView: GMSMapView,
  didTapPOIWithPlaceID placeID: String,
  name: String,
  location: CLLocationCoordinate2D
) {
  infoMarker.snippet = placeID
  infoMarker.position = location
  infoMarker.title = name
  infoMarker.opacity = 0;
  infoMarker.infoWindowAnchor.y = 1
  infoMarker.map = mapView
  mapView.selectedMarker = infoMarker
}

Objective-C

// Declare a GMSMarker instance at the class level.
GMSMarker *infoMarker;

// Attach an info window to the POI using the GMSMarker.
- (void)mapView:(GMSMapView *)mapView
    didTapPOIWithPlaceID:(NSString *)placeID
                    name:(NSString *)name
                location:(CLLocationCoordinate2D)location {
  infoMarker = [GMSMarker markerWithPosition:location];
  infoMarker.snippet = placeID;
  infoMarker.title = name;
  infoMarker.opacity = 0;
  CGPoint pos = infoMarker.infoWindowAnchor;
  pos.y = 1;
  infoMarker.infoWindowAnchor = pos;
  infoMarker.map = mapView;
  mapView.selectedMarker = infoMarker;
}

停止在地图上显示地图注点

您可以通过向所有地图注点或特定类别的地图注点应用自定义样式来隐藏地图注点。

以下 JSON 样式声明会在地图上隐藏所有商家地图注点：

[
  {
    "featureType": "poi.business",
    "stylers": [
      { "visibility": "off" }
    ]
  }
]

下面的另一个 JSON 示例可以简化所有类别地图注点的显示：

[
  {
    "featureType": "poi",
    "stylers": [
      { "visibility": "simplified" }
    ]
  }
]

如需了解详情，请参阅有关通过样式设置隐藏地图项的指南。