正如其他人所说,使用谷歌的 JavaScript API 是不可能的。但是,Google 确实允许服务器端请求最多 23 个航点。因此,使用 PHP 和 JavaScript,我能够解决问题。
您需要做的是从服务器端请求中获取“航点顺序”,然后让 JavaScript 为您提供每个位置之间的方向。
<?php
$startLocation = "40.713,-74.0135";
$endLocation = "40.75773,-73.985708";
$waypoints = array("40.748433,-73.985656|", "40.689167,-74.044444|");
$apiKey = "";
$routeData = json_decode(file_get_contents("https://maps.googleapis.com/maps/api/directions/json?origin=".$startLoc."&destination=".$endLoc."&waypoints=optimize:true|".$waypoints."&key=".$apiKey));
echo "var waypointsOrder = ". json_encode($routeData->routes[0]->waypoint_order) . ";\n";
?>
var startLocation = {lat: 40.713, lng: -74.0135};
var endLocation = {lat: 40.75773, lng: -73.985708};
//get directions from the origin to the first waypoint
var request = {
origin: startLocation,
destination: JSON.parse(places[waypointsOrder[0]][1]),
travelMode: google.maps.TravelMode.DRIVING
};
directionsService.route(request, function (result, status) {
if (status == google.maps.DirectionsStatus.OK) {
renderDirections(result, map);
}
});
//get directions from the last waypoint to the destination
var request = {
origin: JSON.parse(places[waypointsOrder[waypointsOrder.length-1]][1]),
destination: endLocation,
travelMode: google.maps.TravelMode.DRIVING
};
directionsService.route(request, function (result, status) {
if (status == google.maps.DirectionsStatus.OK) {
renderDirections(result, map);
}
});
//get directions between each waypoint
for (i = 1; i < waypointsOrder.length; i++) {
var request = {
origin: JSON.parse(places[waypointsOrder[i-1]][1]),
destination: JSON.parse(places[waypointsOrder[i]][1]),
travelMode: google.maps.TravelMode.DRIVING
};
directionsService.route(request, function (result, status) {
if (status == google.maps.DirectionsStatus.OK) {
renderDirections(result, map);
}
});
}
function renderDirections(result, map) {
var directionsDisplay = new google.maps.DirectionsRenderer ({
map: map
});
directionsDisplay.setMap(map);
directionsDisplay.setDirections(result);
}