Google Maps Angular 2 AGM库逐个位置设置

Question

我在一个页面上实现了一个Google地图，该地图传递给我，然后我需要获取该位置ID并使用该标记加载地图。我正在浏览文档，但尚不清楚如何从 <agm-map>标签中定位映射对象，以便我可以设置位置ID。这是代码的一部分：

  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，我有类似的东西：

<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，看起来要设置您需要这样的位置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是否通过<agm-map>。

Answer 1

您可以使用agm-map的mapReady输出属性。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。当您的地图准备就绪时将调用此功能。

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，以便您能够将值设置为您传递给HTML的纬度和经度参数。

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