Question

这是我面临的非常奇怪的问题。在我的html页面中有2个文本框与谷歌地图连接。问题是按钮点击它计算完美的结果但是如果我尝试在文本框上运行相同的功能而不是显示错误的结果。这是我的页面的链接。第二个文本框更改时是否无法获得结果？

代码

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title></title>
    <style type="text/css">
        body
        {
            font-family: Arial;
            font-size: 10pt;
        }
    </style>
</head>
<body onload="GetRoute();">
    <script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false&libraries=places"></script>
    <script type="text/javascript">
        var source, destination;
        var directionsDisplay;
        var directionsService = new google.maps.DirectionsService();
        google.maps.event.addDomListener(window, 'load', function () {
            new google.maps.places.SearchBox(document.getElementById('txtSource'));
            new google.maps.places.SearchBox(document.getElementById('txtDestination'));
            directionsDisplay = new google.maps.DirectionsRenderer({ 'draggable': true });
        });

        function GetRoute() {
            var mumbai = new google.maps.LatLng(18.9750, 72.8258);
            var mapOptions = {
                zoom: 7,
                center: mumbai
            };
            map = new google.maps.Map(document.getElementById('dvMap'), mapOptions);
            directionsDisplay.setMap(map);
            directionsDisplay.setPanel(document.getElementById('dvPanel'));

            //*********DIRECTIONS AND ROUTE**********************//
            source = document.getElementById("txtSource").value;
            destination = document.getElementById("txtDestination").value;

            var request = {
                origin: source,
                destination: destination,
                travelMode: google.maps.TravelMode.DRIVING
            };
            directionsService.route(request, function (response, status) {
                if (status == google.maps.DirectionsStatus.OK) {
                    directionsDisplay.setDirections(response);
                }
            });

            //*********DISTANCE AND DURATION**********************//
            var service = new google.maps.DistanceMatrixService();
            service.getDistanceMatrix({
                origins: [source],
                destinations: [destination],
                travelMode: google.maps.TravelMode.DRIVING,
                unitSystem: google.maps.UnitSystem.METRIC,
                avoidHighways: false,
                avoidTolls: false
            }, function (response, status) {
                if (status == google.maps.DistanceMatrixStatus.OK && response.rows[0].elements[0].status != "ZERO_RESULTS") {
                    var distance = response.rows[0].elements[0].distance.text;
                    var duration = response.rows[0].elements[0].duration.text;
                    var dvDistance = document.getElementById("dvDistance");
                    dvDistance.innerHTML = "";
                    dvDistance.innerHTML += "Distance: " + distance + "<br />";
                    dvDistance.innerHTML += "Duration:" + duration;

                } else {
                    alert("Unable to find the distance via road.");
                }
            });
        }
    </script>
    <table border="0" cellpadding="0" cellspacing="3">
        <tr>
            <td colspan="2">
                Source:
                <input type="text" id="txtSource" style="width: 200px" />
                &nbsp; Destination:
                <input type="text" id="txtDestination"  onchange="GetRoute(this);"  style="width: 200px" />
                <br />
                <input type="button" value="Get Route" onclick="GetRoute()" />
                <hr />
            </td>
        </tr>
        <tr>
            <td colspan="2">
                <div id="dvDistance">
                </div>
            </td>
        </tr>
        <tr>
            <td>
                <div id="dvMap" style="width: 500px; height: 500px">
                </div>
            </td>
            <td>
                <div id="dvPanel" style="width: 500px; height: 500px">
                </div>
            </td>
        </tr>
    </table>
    <br />
</body>
</html>

Answer 1

因为您正在尝试在文本框值更改的同时运行脚本，因此无法获得准确的距离。只需设置定时器，延迟你的功能运行2秒钟。在这一行做出改变。

<input type="text" id="txtDestination"  onchange="setTimeout(function () {GetRoute()}, 2000);"  style="width: 200px" />

它将延迟你的功能2秒＆amp;然后跑。

希望这会对你有帮助..

Google地图计算不同距离的文本框更改＆amp;按钮单击

1 个答案: