【发布时间】：2014-12-24 20:37:21
【问题描述】：
网上有很多示例/代码可用于使用多个航点创建 Google 地图。我通过排除所有标记、单击按钮等创建了类似版本的代码。
我正在使用谷歌地图 V3 航点在多个目的地之间创建路线。由于我们不能使用超过 8 个航点，我正在使用批量处理多个航点。在下面的代码中有 19 个 gps 位置，其中 10 个 gps 位置一批处理，另一批处理 9 个。 drawRouteMap 函数被调用来为 10 个（或更少）gps 位置的集合绘制路线。
问题是谷歌地图在每个函数调用中都被覆盖。谷歌地图的输出显示了最新的处理值。任何人都可以建议我哪里出错了
<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var directionsDisplay;
var directionsService = new google.maps.DirectionsService();
var map;
function calcRoute() {
map = new google.maps.Map(document.getElementById('dvMap'), mapOptions);
var msg ="41.077354,-81.511337:41.080647,-81.516579:41.077435,-81.521561:41.075253,-81.521492:41.074604,-81.520309:41.07415,-81.516335:41.073158,-81.514931:41.070534,-81.516563:41.066677,-81.516502:41.063942,-81.516502:41.06514,-81.513458:41.067383,-81.513412:41.069546,-81.513397:41.070778,-81.513382:41.072514,-81.512619:41.071106,-81.507614:41.073326,-81.506195";
var input_msg=msg.split(":");
var locations = new Array();
for (var i = 0; i < input_msg.length; i++) {
var tmp_lat_lng =input_msg[i].split(",");
locations.push(new google.maps.LatLng(tmp_lat_lng[0], tmp_lat_lng[1]));
}
directionsDisplay = new google.maps.DirectionsRenderer();
var mapOptions = {
center: locations[0],
zoom: 12,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
directionsDisplay.setMap(map);
var i =locations.length;
var index =0;
while(i !=0 ){
if(i<3){
var tmp_locations =new Array();
for (var j=index;j<locations.length;j++) {
tmp_locations.push(locations[index]);
}
drawRouteMap(tmp_locations);
i=0;
index=locations.length;
}
if( i>= 3 && i<=10) {
alert("before :fun < 10: i value "+i+" index value"+index);
var tmp_locations =new Array();
for (var j=index;j<locations.length;j++) {
tmp_locations.push(locations[j]);
}
drawRouteMap(tmp_locations);
i=0;
index=locations.length;
alert("after fun < 10: i value "+i+" index value"+index);
}
if(i > 10) {
alert("before :fun > 10: i value "+i+" index value"+index);
var tmp_locations =new Array();
for (var j=index;j<index+10;j++) {
tmp_locations.push(locations[j]);
}
drawRouteMap(tmp_locations);
i=i-10;
index =index+10;
alert("after fun > 10: i value "+i+" index value"+index);
}
}
}
function drawRouteMap(locations){
var start,end;
var waypts = [];
for(var k =0;k<locations.length;k++){
if (k>=1 && k<=locations.length-2) {
waypts.push({
location:locations[k],
stopover:true});
}
if(k==0)
start=locations[k];
if(k==locations.length-1)
end=locations[k];
}
var request = {
origin: start,
destination: end,
waypoints: waypts,
optimizeWaypoints: true,
travelMode: google.maps.TravelMode.DRIVING
};
console.log(request);
directionsService.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
console.log(status);
directionsDisplay.setDirections(response);
}
});
}
google.maps.event.addDomListener(window, 'load', calcRoute);
</script>
<div id="dvMap" style="width: 500px; height: 500px">
</div>
</body>
</html>
【问题讨论】：
标签： javascript google-maps google-maps-api-3