用于谷歌地图的Angular 2 agm库按地点ID设置

Question

我正在一个页面中实现一个谷歌地图,其中一个地方ID传递给我,然后我需要获得这样的地方ID并加载该标记的地图.我正在浏览文档,但不清楚如何从<agm-map>标记中定位地图对象,以便我可以设置地点ID.以下是代码的一部分:

  public latitude: number;
  public longitude: number;
  public zoom: number;
  public placeid: string;

  constructor(
    private mapsAPILoader: MapsAPILoader,
    private ngZone: NgZone
  ) {}

  ngOnInit() {
      //set google maps defaults
      this.zoom = 4;
      this.latitude = 39.8282;
      this.longitude = -98.5795;
      this.placeid = "ChIJMS2FahDQzRIRcJqX_aUZCAQ";

      //set current position
      this.setCurrentPosition();

      this.mapsAPILoader.load().then(() => {
            //How do i set the agm-map here to load the map with the placeid

      });
    }

    private setCurrentPosition() {
      if ("geolocation" in navigator) {
        navigator.geolocation.getCurrentPosition((position) => {
          this.latitude = position.coords.latitude;
          this.longitude = position.coords.longitude;
          this.zoom = 12;
        });
      }
    }

然后在html文件上我有这样的事情:

<agm-map [latitude]="latitude" [longitude]="longitude" [scrollwheel]="false" [zoom]="zoom">
      <agm-marker [latitude]="latitude" [longitude]="longitude"></agm-marker>
</agm-map>

我查看了GOOGLE文档,它看起来像设置你需要这样的地方ID

var request = {
  placeId: 'ChIJN1t_tDeuEmsRUsoyG83frY4'
};

service = new google.maps.places.PlacesService(map);
service.getDetails(request, callback);

function callback(place, status) {
  if (status == google.maps.places.PlacesServiceStatus.OK) {
    createMarker(place);
  }
}

我遇到的问题是,我不确定map自从使用以来要传递什么<agm-map>.

Answer 1

你可以使用的mapReady输出属性agm-map.将您的HTML更改为

<agm-map [latitude]="latitude" [longitude]="longitude" [scrollwheel]="false" [zoom]="zoom" (mapReady)="mapReady($event)">
      <agm-marker [latitude]="latitude" [longitude]="longitude"></agm-marker>
</agm-map>

并在组件中定义以下功能.地图准备好后,将调用此函数.

mapReady($event: any) { 
  // here $event will be of type google.maps.Map 
  // and you can put your logic here to get lat lng for marker. I have just put a sample code. You can refactor it the way you want.
  this.getLatLong('ChIJN1t_tDeuEmsRUsoyG83frY4', $event, null);
}

getLatLong(placeid: string, map: any, fn) {
    let placeService = new google.maps.places.PlacesService(map);
    placeService.getDetails({
      placeId: placeid
      }, function (result, status) {
        console.log(result.geometry.location.lat());
        console.log(result.geometry.location.lng())
      });
  }

根据您的需要更改/重构此示例代码,以便您可以将值设置为要传递给html的纬度和经度参数.

<agm-marker [latitude]="latitude" [longitude]="longitude"></agm-marker>