我正在尝试制作 map 加载标记 - 从 xml 文件中提取。目前它完美地做到了这一点。不过，我还希望 map 根据超链接传递的月份重新加载新标记。
当通过超链接更改“global_month”变量时，将触发 ajax 请求，并且应根据稍后传递给“if”语句的日期用新数据重新填充“data_array”。但是，它重用了“data_array”内容，并且不会用新数据填充它。
我尝试通过“change_date_range”函数中的“global_month = []”重置“global_month”，但是 - 数组似乎没有重新填充。我花了 3 个小时试图找出我哪里出错了，但找不到。有人可以帮忙吗？还有更有效的方法吗？
非常感谢您抽出时间!
///////////////////////////////////////////////
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<script src="jquery-1.7.1.min.js" type="text/javascript"></script>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script>
$(document).ready(function()
{
$.ajax({
type: "GET",
url: "driving_test_centers.xml",
dataType: "xml",
success: parseXml
});
});
var global_month = 6;
function refetch()
{
$.ajax({
type: "GET",
url: "driving_test_centers.xml",
dataType: "xml",
success: parseXml
});
};
var data_array = [];
var empty_holder;
var empty_month;
var info_date;
var address1;
var address2;
var town;
var county;
var postcode;
var lat;
var lon;
var male_pass_percentage1;
var male_pass_percentage;
var female_pass_percentage1;
var female_pass_percentage;
var the_new_date;
var infowindow;
var xml_contents;
function parseXml(xml)
{
$(xml).find("test_center").each(function() // look for all of the test centers
{
center_name = $(this).attr('name');
address1 = $(this).find('address1').text();
address2 = $(this).find('address2').text();
town = $(this).find('town').text();
county = $(this).find('county').text();
postcode = $(this).find('postcode').text();
lat = $(this).find('lat').text();
lon = $(this).find('lon').text();
$(this).find("date_info").each(function()
{
info_date = $(this).attr('date');
empty_month = $(this).find('month').text();
male_pass_percentage = $(this).find('male');
male_pass_percentage = male_pass_percentage.find('pass_percentage').text();
female_pass_percentage = $(this).find('female');
female_pass_percentage = female_pass_percentage.find('pass_percentage').text();
if(empty_month == global_month){
data_array.push([lat,lon,center_name,info_date,male_pass_percentage,female_pass_percentage]);
}
});
});
}
function change_date_range(the_new_date){
global_month = the_new_date;
refetch();
init();
};
</script>
<script>
function init() {
var options = {
zoom: 5,
center: new google.maps.LatLng(55.3781, -3.4360),
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var places;
places = null;
var map = new google.maps.Map(document.getElementById('map'), options);
var bounds = new google.maps.LatLngBounds();
var places = data_array;
var temp_location;
for (var i = 0; i < places.length; i++) {
temp_location = new google.maps.LatLng(places[i][0], places[i][1])
// Adding the markers
var marker = new google.maps.Marker({
position: temp_location,
map: map,
title: places[i][2]
});
// Wrapping the event listener inside an anonymous function
// that we immediately invoke and passes the variable i to.
(function(i, marker) {
// Creating the event listener. It now has access to the values of
// i and marker as they were during its creation
google.maps.event.addListener(marker, 'click', function() {
// Check to see if we already have an InfoWindow
if (!infowindow) {
infowindow = new google.maps.InfoWindow();
}
// Setting the content of the InfoWindow
infowindow.setContent(places[i][2] + "<br />" + global_month + "<br />" + places[i][3] + "<br /><br />Male: " + places[i][4] + "%<br />Female: " + places[i][5] + "%");
// Tying the InfoWindow to the marker
infowindow.open(map, marker);
});
})(i, marker);
// Extending the bounds object with each LatLng
bounds.extend(temp_location);
}
// Adjusting the map to new bounding box
map.fitBounds(bounds)
};
</script>
</head>
<body onload="init()">
<div id="map" style="width:800px;height:600px"></div>
<a href="javascript:change_date_range(7)">click</a>
</body>
</html>
//////////////////////////////////////////////////////////////////////////////////////////////////////
XML文件(一小部分):
http://tinypaste.com/198889bb
最佳答案
您没有清除 data_array 数组...您只是继续向其添加内容。为什么不将 data_array = []; 添加到 parseXml 函数的开头
编辑:您还应该清除已经放置的标记...使这变得简单的一个好方法是，当您添加标记时，将它们保存在一个数组中，然后您可以循环遍历它，设置的 map 属性每个都为空:
for (x=0;x<markers.length;x++) {markers[x].setMap(null);}
关于javascript - Google Map API v3 - Ajax(Javascript + Jquery)GET 问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/9754258/