-1

我有这个代码：

<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false">          
</script>
<script type="text/javascript">
var directionDisplay;
var map;


function initialize() {
directionsDisplay = new google.maps.DirectionsRenderer();
var copenhagen = new google.maps.LatLng(55.6771, 12.5704);
var myOptions = {
    zoom:12,
    mapTypeId: google.maps.MapTypeId.ROADMAP,
    center: copenhagen
}

map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
directionsDisplay.setMap(map);
}


var directionsService = new google.maps.DirectionsService();

function calcRoute() {
var start = document.getElementById("start").value;
var end = document.getElementById("end").value;
var distanceInput = document.getElementById("distance");

var request = {
    origin:start,
    destination:end,
    travelMode: google.maps.DirectionsTravelMode.DRIVING
};

directionsService.route(request, function(response, status) {
    if (status == google.maps.DirectionsStatus.OK) {
        directionsDisplay.setDirections(response);
        distanceInput.value = response.routes[0].legs[0].distance.value / 1000;
    }
});
}
</script>

<title>Distance Calculator</title>

<style type="text/css">

        body {
            font-family:Helvetica, Arial;
        }
        #map_canvas {
            height: 50%;
        }
</style>
</head>
<body>

<body onload="initialize()">
<p>Enter your current location and desired destination to get the distance</p>
    <div>
        <p>
            <label for="start">Start: </label>
            <input type="text" name="start" id="start" />
<br>
            <label for="end">End:  </label>
            <input type="text" name="end" id="end" />

            <input type="submit" value="Calculate Route" onclick="calcRoute()" />
        </p>
        <p>
<script>

                 var cost=distance*2-(distance*2*0.20)

                 document.write("Cost: ");
                 document.write(cost + "<br>");


</script>
    </p>
    </div>
    <div id="map_canvas"></div>
</body>
</html>

问题中的代码是这样的：

<script>

                 var cost=distance*2-(distance*2*0.20)

                 document.write("Cost: ");
                 document.write(cost + "<br>");


</script>

此代码要求用户提供起始地址和目标地址，并使用 Google Maps API 计算两点之间的距离。然后，我添加了功能，使用他们的区域统一费率公式（距离以公里为单位）*2-20% 计算出租车行驶该距离所需的费用。

我的问题在于“距离”变量是在 API 代码中定义的，所以当我在计算成本时引用它时，它似乎并没有延续......就像它甚至不存在一样。我知道这与它在与尝试使用它的下标不同的下标中定义有关。任何和所有的建议表示赞赏！

4

1 回答 1

2

我想这就是你要找的。希望能帮助到你。

<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false">          
</script>
<script type="text/javascript">
var directionDisplay;
var map;


function initialize() {
directionsDisplay = new google.maps.DirectionsRenderer();
var copenhagen = new google.maps.LatLng(55.6771, 12.5704);
var myOptions = {
    zoom:12,
    mapTypeId: google.maps.MapTypeId.ROADMAP,
    center: copenhagen
}

map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
directionsDisplay.setMap(map);
}


var directionsService = new google.maps.DirectionsService();

function calcRoute() {
var start = document.getElementById("start").value;
var end = document.getElementById("end").value;
var distanceInput = document.getElementById("distance");

var request = {
    origin:start,
    destination:end,
    travelMode: google.maps.DirectionsTravelMode.DRIVING
};

directionsService.route(request, function(response, status) {
    if (status == google.maps.DirectionsStatus.OK) {
        directionsDisplay.setDirections(response);
        distanceInput.value = response.routes[0].legs[0].distance.value / 1000;

        var cost=distanceInput.value*2-(distanceInput.value*2*0.20)
        var costDiv = document.getElementById("cost");
        costDiv.style.display = "";
        costDiv.innerHTML = "Cost: "+cost + "<br>";
    }
});
}
</script>

<title>Distance Calculator</title>

<style type="text/css">

        body {
            font-family:Helvetica, Arial;
        }
        #map_canvas {
            height: 50%;
        }
</style>
</head>
<body>

<body onload="initialize()">
<p>Enter your current location and desired destination to get the distance</p>
    <div>
        <p>
            <label for="start">Start: </label>
            <input type="text" name="start" id="start" />
<br>
            <label for="end">End:  </label>
            <input type="text" name="end" id="end" />
            <input type="hidden" name="distance" id="distance" >
            <input type="submit" value="Calculate Route" onclick="calcRoute()" />
            <div style="display:none;" id="cost"></div>
        </p>
        <p>

    </p>
    </div>
    <div id="map_canvas"></div>
</body>
</html>

编辑：这是获得最小距离和与之相关的成本的方法。首先，您必须向 Google Maps API provideRouteAlternatives = true 发出请求，否则您将只能获得一条路线作为响应。其次，我确实认为谷歌正在返回按距离升序排序的路线 - 对此并不完全确定，但您可以假设第一条路线是距离最短的路线。无论如何，这是做你想做的事情的一种方法。

<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false">          
</script>
<script type="text/javascript">
var directionDisplay;
var map;


function initialize() {
directionsDisplay = new google.maps.DirectionsRenderer();
var copenhagen = new google.maps.LatLng(55.6771, 12.5704);
var myOptions = {
    zoom:12,
    mapTypeId: google.maps.MapTypeId.ROADMAP,
    center: copenhagen
}

map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
directionsDisplay.setMap(map);
}


var directionsService = new google.maps.DirectionsService();

function calcRoute() {
var start = document.getElementById("start").value;
var end = document.getElementById("end").value;
var distanceInput = document.getElementById("distance");

var request = {
    origin:start,
    destination:end,
    travelMode: google.maps.DirectionsTravelMode.DRIVING,
    provideRouteAlternatives: true
};

directionsService.route(request, function(response, status) {
    if (status == google.maps.DirectionsStatus.OK) {
        if(response.routes[0] != undefined && response.routes[0].legs[0] != undefined) {
            /* Take the min distance route */
            / * Assume the first distance is the shortest */
            var lowestDistance = response.routes[0].legs[0].distance.value;
            for(var i =0; i<response.routes.length;i=i+1) {
            console.log(response.routes[i].legs[0].distance.value);
                if(lowestDistance <= response.routes[i].legs[0].distance.value) {
                    lowestDistance = response.routes[i].legs[0].distance.value;
                    directionsDisplay.setDirections(response);
                    distanceInput.value = response.routes[i].legs[0].distance.value / 1000;

                    var cost=distanceInput.value*2-(distanceInput.value*2*0.20)
                    var costDiv = document.getElementById("cost");
                    costDiv.style.display = "";
                    costDiv.innerHTML = "Cost: "+cost + "<br>";
                }
            }
        }
    }
});
}
</script>

<title>Distance Calculator</title>

<style type="text/css">

        body {
            font-family:Helvetica, Arial;
        }
        #map_canvas {
            height: 50%;
        }
</style>
</head>
<body>

<body onload="initialize()">
<p>Enter your current location and desired destination to get the distance</p>
    <div>
        <p>
            <label for="start">Start: </label>
            <input type="text" name="start" id="start" />
<br>
            <label for="end">End:  </label>
            <input type="text" name="end" id="end" />
            <input type="hidden" name="distance" id="distance" >
            <input type="submit" value="Calculate Route" onclick="calcRoute()" />
            <div style="display:none;" id="cost"></div>
        </p>
        <p>

    </p>
    </div>
    <div id="map_canvas"></div>
</body>
</html>
于 2013-02-02T22:32:36.670 回答