从附近的异步Google获取值

Question

我开始使用Google Places API工作Angle 6项目。

我们有“ nearbySearch”功能。

我只是想获取来自“ nearbySearch”的“回调函数”的值，并将其保存到名为“ stores”的变量中。

数据确实接收到“结果”回调变量。我只想要它到外面的世界。

我在该回调函数中尝试了很多事情。包括“ this.stores = results”。

什么都没有。似乎“存储变量”从未初始化。我的示例代码如下。

位于“ getStores（）”方法中。

map: google.maps.Map;
 subscription: Subscription;
 dataEmit: Subject<any>;
 stores = [];
 dataLoaded$ = false;
 address: String;
 lat = 33.780627;
 lon = -84.336754;
 filtersLoaded: Promise<boolean>;


 constructor(private dataService: DataService, private rest: RestApiService) {}


async ngOnInit() {
 this.dataEmit = new Subject();
 this.address = this.dataService.getLocation();
 this.getLatLong();
 this.dataLoaded$ = true;
 console.log(this.stores);
 console.log(this.stores);
 }


 async getLatLong() {
 const data = await this.rest.get(
 `https://maps.googleapis.com/maps/api/geocode/json?address=${
 this.address
 }&key=MY_API_KEY`
 );
 this.lat = data["results"][0].geometry.location.lat;
 this.lon = data["results"][0].geometry.location.lng;
 console.log("lat : " + this.lat + " lon : " + this.lon);
 console.log(data);
 }


getStores() {
 console.log(this.address);
 const radius = 2000000;
 const keyword = this.dataService.getLocation();
 const cur_location = new google.maps.LatLng(this.lat, this.lon);
 const request = {
             type: "restaurant",
             location: cur_location,
             radius: radius
                 };

 const pyrmont = new google.maps.LatLng(this.lat, this.lon);
 const map = new google.maps.Map(document.getElementById("map"), {
                    center: pyrmont,
                    zoom: 15
                     });
 const service = new google.maps.places.PlacesService(map);

 service.nearbySearch(request, (results, status) => {
     if (status === google.maps.places.PlacesServiceStatus.OK) {
          this.dataService.set(results);
           if (results) {
                for (let i = 0; i < results.length; i++) {
                       let place = results[i];
                        this.dataEmit.next(place);
                }
              this.dataEmit.complete();
           }
      }
    });
 }


ngAfterViewInit() {
 this.getStores();
 console.log("ngAfterViewInit");
 this.dataEmit.subscribe(data => {
    this.stores = data;
     });
  console.log(this.stores.length);
 }