我工作在離子離子谷歌地圖應用程式和使用谷歌提供的本機和方向服務我甲型肝炎多個途徑,使用以下程式碼:

calculateAndDisplayRoute() {
var points = [];
this.directionsService.route({
origin: this.start,
destination: this.end,
travelMode: 'DRIVING',
provideRouteAlternatives: true

}, (response, status) => {
if (status === 'OK') {
var step = 1;

for(var j=0;j<response.routes.length;j++){

  points=[]
  for (var i = 0; i < response.routes[j].overview_path.length; i++) {
    points.push(response.routes[j].overview_path[i].toJSON())
  }
  let position=points[20]
  this.drawRoutePolyLine(points,j,position)
  step=step+1
}
 

} else {
window.alert('Directions request failed due to ' + status);
}
});
} 幫我新增infowindow