谷歌路线服务w /航点返回ZERO_RESULTS [英] Google Directions Service w/ Waypoints returning ZERO_RESULTS

问题描述

我目前有一个DirectionsRenderer函数，可以在我的页面上正确路由收件人和发件人字段。路由完成后，我抓取overview_path，然后根据路径从Fusion Table中加载元素。完成此操作后，我设置了一个侦听器来寻找'directions_changed'，它将显示一个航点。

  google .maps.event.addListener（directionsDisplay，'directions_changed'，function（）{
 
 var wypnt = directionsDisplay.getDirections（）。routes [0] .legs [0] .via_waypoints.toString（）。 match（/ [^（）] + /）; 
 wypnt.toString（）。split（，）; 
 wypnt = new google.maps.LatLng（wypnt [1]，wypnt [0 ]）; 
 
 var waypoint = []; 
 
 waypoint.push（{location：wypnt，stopover：true}）; 
 
 route航点）; 
}）; 
  

一旦我将它传递回route（）函数（该函数与To和如果（航点）{

var请求

  = {
 origin：document.getElementById（search-input-from）。value，
 destination：document.getElementById（search-input-to）。value，
 waypoints：航点，
 optimizeWaypoints：true，
 travelMode：google.maps.DirectionsTravelMode.DRIVING 
}; 
} 
 else {
 
 var request = {
 origin：document.getElementById（search-input-from）。value，
 destination： document.getElementById（search-input-to）。value，
 travelMode：google.maps.DirectionsTravelMode.DRIVING 
}; 
} 
  

其余代码基于以下if语句：

  directionService.route（request，function（result，status）{
 if（status == google.maps.DirectionsStatus.OK ）{
 
 //做东西
 
} 
其他{
 alert（Directions queries failed：+ status）; 
} 
}; 
  

不幸的是，我回来的是路线查询失败：ZERO_RESULTS 。任何想法为什么会发生这种情况？我不知道我是如何形成航点的方式是错误的或其他的。

有些问题：
$ b

  wypnt.toString（）。split（，）; 
  

这对wypnt没有任何影响，split不会修改原始对象，它必须是：

  wypnt = wypnt.toString（）。split（，）; 
  

为什么是ar您在这里转换经度和纬度？

  wypnt = new google.maps.LatLng（wypnt [1]，wypnt [0] ）; 
  

它必须是

  wypnt = new google.maps.LatLng（wypnt [0]，wypnt [1]）; 
  

最重要的是：你为什么要这样做？你需要一个数组，将它转换为一个字符串，拆分字符串以获取原始数组。

简单地使用：

  google.maps.event.addListenerOnce（directionsDisplay，'directions_changed'，
 function（）{
 var waypoints = directionsDisplay.getDirections（）。routes [0 ] 
 .legs [0] .via_waypoints || []; 
 for（var i = 0; i< waypoints.length; ++ i）{
 waypoints [i] = {stopover ：true，location：waypoints [i]} 
} 
 route（waypoints）; 
}）; 
  

但是请注意：当您重绘路线 directions_changed 会再次触发。

I currently have a DirectionsRenderer function that properly routes To and From fields on my page. After the routing is done I grab the overview_path and then load elements from a Fusion Table based on the path. Once this is done I've set up a listener looking for 'directions_changed', which would indicate a waypoint as such:

google.maps.event.addListener(directionsDisplay, 'directions_changed', function(){

        var wypnt = directionsDisplay.getDirections().routes[0].legs[0].via_waypoints.toString().match(/[^()]+/);
        wypnt.toString().split(",");
        wypnt = new google.maps.LatLng(wypnt[1],wypnt[0]);

        var waypoint = [];

        waypoint.push({ location: wypnt, stopover: true });

        route(waypoint);
    });

Once I pass it back to the route() function (the function that works normally with the To and From fields), I have this section of code:

if(waypoint){

    var request = {
        origin: document.getElementById("search-input-from").value,
        destination: document.getElementById("search-input-to").value,
        waypoints: waypoint,
        optimizeWaypoints: true,
        travelMode: google.maps.DirectionsTravelMode.DRIVING
    };
}
else{

    var request = {
        origin: document.getElementById("search-input-from").value,
        destination: document.getElementById("search-input-to").value,
        travelMode: google.maps.DirectionsTravelMode.DRIVING
    };
}

The rest of the code is based off the following if statement:

directionService.route(request, function(result, status) {
    if (status == google.maps.DirectionsStatus.OK) {

       //do stuff

     }
    else {
                alert("Directions query failed: " + status);
            }
    };

Unfortunately all I'm getting back is "Directions query failed: ZERO_RESULTS". Any idea why this is happening? I'm not sure if the way I'm forming the waypoint is wrong or something else.

解决方案

Some issues:

    wypnt.toString().split(",");

this will not have any effect to wypnt, split will not modify the original object. it has to be:

     wypnt = wypnt.toString().split(",");

Why are you switching latitude and longitude here?

    wypnt = new google.maps.LatLng(wypnt[1],wypnt[0]);

it has to be

   wypnt = new google.maps.LatLng(wypnt[0],wypnt[1]);

Most of all: why do you do it at all? you take an array, convert it to a string, split the string to get the original array.

Simply use:

 google.maps.event.addListenerOnce(directionsDisplay, 'directions_changed', 
   function(){
   var waypoints=directionsDisplay.getDirections().routes[0]
                    .legs[0].via_waypoints||[];
    for(var i=0;i<waypoints.length;++i){
       waypoints[i]={stopover:true,location: waypoints[i]}
    }
    route(waypoints);
});

But note: when you redraw the route directions_changed will fire again.

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