对于用户输入他的地址的网站,我试图找到离他最近的用户可以收集订购商品的位置。
根据用户的地址,我可以将可能的取货地点缩小到 2 到 5 个之间。所以我想计算用户地址(A 点)和可能的取货地点之间的距离。
此处的演示仅使用两个地址即可正常工作。我已经尽可能多地调整代码以使用两个以上的地址。我在这里发布了我的 JS 代码,因为我似乎无法在 SO 中正确格式化它。
代码中有两个警报。第一个警报正确显示了不同的取货地点。但第二个警报始终显示最后取货地点。
谁能解释为什么?
HTML:
<p id="hello">Hello World</p>
JavaScript:
var geocoder, location1, location2, gDir;
function initialize(counter) {
if( counter == 0 ){
geocoder = new GClientGeocoder();
gDir = new GDirections();
}
GEvent.addListener(gDir, "load", function() {
var drivingDistanceMiles = gDir.getDistance().meters / 1609.344;
var drivingDistanceKilometers = gDir.getDistance().meters / 1000;
$("#results").append('<strong>Driving Distance: </strong>' + drivingDistanceKilometers + ' kilometers<br /><br />');
});
}
function getDistance(agency_add, counter) {
initialize(counter);
geocoder.getLocations(agency_add, function (response) {
if (!response || response.Status.code != 200) {
alert("Sorry, we were unable to geocode the address" + agency_add);
}
else {
location1 = {lat: response.Placemark[0].Point.coordinates[1], lon: response.Placemark[0].Point.coordinates[0], address: response.Placemark[0].address};
//alert("ONE: "+location1.address);
geocoder.getLocations(document.forms[0].address1.value, function (response) {
//alert("TWO: "+location1.address);
if (!response || response.Status.code != 200) {alert("Sorry, we were unable to geocode the second address");}
else {
location2 = {lat: response.Placemark[0].Point.coordinates[1], lon: response.Placemark[0].Point.coordinates[0], address: response.Placemark[0].address};
gDir.load('from: ' + location1.address + ' to: ' + location2.address);
}
});
}
});
}
$(document).ready(function(){
//put each agency address in an array
var agencies = [];
$(".agency_field").each(function(index) {
agencies.push($(this).val());
});
for (var i = 0; i < agencies.length; i++){
var res = getDistance(agencies[i], i);
}
});