问获取用户在IONIC 5中按下start按钮时的确切位置

EN

getCurrentLocation() {    

    let options = {timeout : 10000 , enableHighAccuracy:true};
    let locationObs = new Observable(observable => {
      this.geolocation.getCurrentPosition(options)

      .then(resp => {

        this.latitude =  resp.coords.latitude
        this.longitude = resp.coords.longitude                

        let location = new google.maps.LatLng(this.latitude, this.longitude);
        observable.next(location);                


      }).catch( error => {             

        loading.dismiss(); 
        return false;
      })
    })

    return locationObs;
  }  

buttonClicked(){   

      let sub = this.getCurrentLocation().subscribe(location => {
           console.log(this.latitude, this.longitude)
           sub.unsubscribe()
      })       
  }