我玩距离矩阵 http://code.google.com/apis/maps/documentation/javascript/services.html#distance_matrix
获取从一个起点到多个目的地的持续时间。我有这个代码:
var duration = new Array();
var service = new google.maps.DistanceMatrixService();
service.getDistanceMatrix(
{
origins: [origin],
destinations: destination,
travelMode: google.maps.TravelMode.DRIVING,
avoidHighways: false,
avoidTolls: false
},
function(response, status)
{
if (status == google.maps.DistanceMatrixStatus.OK)
{
var destinations = response.destinationAddresses;
var results = response.rows[0].elements;
for (var j = 0; j < results.length; j++)
duration[j] = results[j].duration.value;
}
});
alert(duration[0]);
但我有警报“未定义”。当我将警报命令放在回调函数中时,我得到了我想要的警报。这是为什么???我该如何解决?
提前谢谢你!