求告知如何获取当前定位

let requestInfo:geoLocationManager.LocationRequest = {'priority': geoLocationManager.LocationRequestPriority.FIRST_FIX, 'scenario': geoLocationManager.LocationRequestScenario.UNSET, 'timeInterval': 60, 'distanceInterval': 100, 'maxAccuracy': 0}; 
let locationChange = (location:geoLocationManager.Location):void => { 
  console.info('locationChanger: data: ' + JSON.stringify(location)); 
  let markerOptions: mapCommon.MarkerOptions = { 
    position: { 
      latitude: Number(location.latitude), 
      longitude: Number(location.longitude) 
    }, 
    rotation: 0, 
    visible: true, 
    zIndex: 0, 
    alpha: 1, 
    anchorU: 0.5, 
    anchorV: 1, 
    clickable: true, 
    draggable: true, 
    flat: false, 
    icon:'mine_select.png' 
  }; 
  this.mapController?.addMarker(markerOptions) 
}; 
try { 
  geoLocationManager.on('locationChange', requestInfo, locationChange); 
} catch (err) { 
  console.error("err:" + JSON.stringify(err)); 
}