google-maps-api-3 - Gmaps 方向保存路线，航点

Question

我有一张带有路线的 map (多个目的地 - 不仅仅是 A、B，如下面的页面所示)。方向是可拖动的。我想保存更改后的路线。下面的页面是我要去的...

http://vikku.info/programming/google-maps-v3/draggable-directions/saving-draggable-directions-saving-waypoints-google-directions-google-maps-v3.htm

这是我所拥有的:

google.maps.event.addListener(directionsDisplay, 'directions_changed', function() {
            console.log('reroute');

            var rleg_count = directionsDisplay.directions.routes[0].legs.length;

            data.start = {
                'lat':directionsDisplay.directions.routes[0].legs[0].start_location.lat(), 
                'lng':directionsDisplay.directions.routes[0].legs[0].start_location.lng()
            };
            data.end = {
                'lat':directionsDisplay.directions.routes[0].legs[rleg_count-1].end_location.lat(), 
                'lng':directionsDisplay.directions.routes[0].legs[rleg_count-1].end_location.lng()
            };

            var wp=[];
            var w = [];
            var route = directionsDisplay.directions.routes[0];
            for (var l = 0; l < route.legs.length; l++) 
            {
                for(var j = 0; j < route.legs[l].via_waypoints.length; j++)
                {
                    w.push({
                        location:{'lat':route.legs[l].via_waypoints[j].lat(), 'lng':route.legs[l].via_waypoints[j].lng()},
                        stopover:true
                    });
                }
            }

            data.waypoints = w;
        });

和 SetRoute 函数:

function setRoute(os)
    {
        var wp = [];
        for(var i=0;i<os.waypoints.length;i++)
        {
            wp[i] = {
                'location': new google.maps.LatLng(os.waypoints[i].location.lat, os.waypoints[i].location.lng),
                'stopover': os.waypoints[i].stopover
            }
        }

        var request = {
            'origin':new google.maps.LatLng(os.start.lat, os.start.lng),
            'destination':new google.maps.LatLng(os.end.lat, os.end.lng),
            'waypoints': wp,
            optimizeWaypoints: false,
            avoidHighways: false,
            avoidTolls: false,
            travelMode: google.maps.TravelMode.DRIVING,
        }

        directionsService.route(request, function(res,sts){
            // console.log(res);
            // console.log(sts);
            if(sts=='OK')
                directionsDisplay.setDirections(res);
        }); 
    }

问题是，如果只有 2 个目的地(A、B)，代码就可以工作，但是一旦有更多目的地……它就不能正常工作……它会忽略其他目的地

据我所知，航点是正确的。多个目的地似乎有问题，我不知道如何纠正。

谢谢!

Answer 1

我设法通过对我的代码进行以下更新来解决该问题:

google.maps.event.addListener(directionsDisplay, 'directions_changed', function() {
            console.log('reroute');

            var rleg_count = directionsDisplay.directions.routes[0].legs.length;

            data.start = {
                'lat':directionsDisplay.directions.routes[0].legs[0].start_location.lat(), 
                'lng':directionsDisplay.directions.routes[0].legs[0].start_location.lng()
            };
            data.end = {
                'lat':directionsDisplay.directions.routes[0].legs[rleg_count-1].end_location.lat(), 
                'lng':directionsDisplay.directions.routes[0].legs[rleg_count-1].end_location.lng()
            };

            var wp=[];
            var w = [];
            var route = directionsDisplay.directions.routes[0];
            for (var l = 0; l < route.legs.length; l++) 
            {
                    // Skip first and last leg - for more than 2 legs
            if(l != 0 || l != rleg_count-1)
            {
/* start solution */
                w.push({
                    location:{'lat':route.legs[l].start_location.lat(), 'lng':route.legs[l].start_location.lng()},
                    stopover:true
                });
            }
/* end solution */
                for(var j = 0; j < route.legs[l].via_waypoints.length; j++)
                {
                    w.push({
                        location:{'lat':route.legs[l].via_waypoints[j].lat(), 'lng':route.legs[l].via_waypoints[j].lng()},
                        stopover:false
                    });
                }
            }

            data.waypoints = w;
        });