我已经按照 google api 教程一点一点地尝试从外部数据库加载我的数据库标记，但没有成功。
https://developers.google.com/maps/articles/phpsqlajax_v3
map 正在加载，但没有显示任何标记我已经使用以下版本来拉出我的标记
<?php
$dom = new DOMDocument("1.0");
$node = $dom->createElement("markers");
$parnode = $dom->appendChild($node);
require_once ('classes/DB.php');
$db = new DB();
$result = $db->query("SELECT * FROM markers");
header("Content-type: text/xml");
// Iterate through the rows, adding XML nodes for each
while ($row = $db->fetchData($result)){
// ADD TO XML DOCUMENT NODE
$node = $dom->createElement("marker");
$newnode = $parnode->appendChild($node);
$newnode->setAttribute("name",$row['name']);
$newnode->setAttribute("address", $row['address']);
$newnode->setAttribute("lat", $row['lat']);
$newnode->setAttribute("lng", $row['lng']);
$newnode->setAttribute("type", $row['type']);
}
echo $dom->saveXML();
?>
当我加载这个页面时，我在页面的源代码中得到了标记，但是当我加载页面时，我仍然看不到标记
<!DOCTYPE html >
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>PHP/MySQL & Google Maps Example</title>
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
//<![CDATA[
var customIcons = {
restaurant: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_blue.png'
},
bar: {
icon: 'http://labs.google.com/ridefinder/images/mm_20_red.png'
}
};
function load() {
var map = new google.maps.Map(document.getElementById("map"), {
center: new google.maps.LatLng(47.6145, -122.3418),
zoom: 13,
mapTypeId: 'roadmap'
});
var infoWindow = new google.maps.InfoWindow;
// Change this depending on the name of your PHP file
downloadUrl("pointer_1.php", function(data) {
var xml = data.responseXML;
var markers = xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
var name = markers[i].getAttribute("name");
var address = markers[i].getAttribute("address");
var type = markers[i].getAttribute("type");
var point = new google.maps.LatLng(
parseFloat(markers[i].getAttribute("lat")),
parseFloat(markers[i].getAttribute("lng")));
var html = "<b>" + name + "</b> <br/>" + address;
var icon = customIcons[type] || {};
var marker = new google.maps.Marker({
map: map,
position: point,
icon: icon.icon
});
bindInfoWindow(marker, map, infoWindow, html);
}
});
}
function bindInfoWindow(marker, map, infoWindow, html) {
google.maps.event.addListener(marker, 'click', function() {
infoWindow.setContent(html);
infoWindow.open(map, marker);
});
}
function downloadUrl(url, callback) {
var request = window.ActiveXObject ?
new ActiveXObject('Microsoft.XMLHTTP') :
new XMLHttpRequest;
request.onreadystatechange = function() {
if (request.readyState == 4) {
request.onreadystatechange = doNothing;
callback(request, request.status);
}
};
request.open('GET', url, true);
request.send(null);
}
function doNothing() {}
//]]>
</script>
</head>
<body oncreate="load()">
<div id="map" style="width: 500px; height: 300px"></div>
</body>
</html>
一旦看到源代码就会输出 xml
<?xml version="1.0"?>
<markers>
<marker name="Pan Africa Market"
address="1521 1st Ave, Seattle, WA" lat="47.608940"
lng="-122.340141"
type="restaurant"/>
<marker name="Buddha Thai & Bar"
address="2222 2nd Ave, Seattle, WA"
lat="47.613590" lng="-122.344391"
type="bar"/>
<marker name="The Melting Pot"
address="14 Mercer St, Seattle, WA" lat="47.624561"
lng="-122.356445"
type="restaurant"/>
<marker name="Ipanema Grill"
address="1225 1st Ave, Seattle, WA"
lat="47.606365" lng="-122.337654"
type="restaurant"/>
<marker name="Sake House"
address="2230 1st Ave, Seattle,
WA" lat="47.612823"
lng="-122.345673"
type="bar"/>
<marker name="Crab Pot"
address="1301 Alaskan Way, Seattle, WA"
lat="47.605961"
lng="-122.340363"
type="restaurant"/>
<marker name="Mama's Mexican Kitchen"
address="2234 2nd Ave, Seattle, WA"
lat="47.613976"
lng="-122.345467"
type="bar"/>
<marker name="Wingdome"
address="1416 E Olive Way, Seattle, WA"
lat="47.617214"
lng="-122.326584"
type="bar"/>
<marker name="Piroshky Piroshky"
address="1908 Pike pl, Seattle, WA"
lat="47.610126"
lng="-122.342834"
type="restaurant"/>
</markers>
知道我可能做错了什么吗？
最佳答案
也许您忘记了将标记分配给 map ，如下所示:
marker.setMap(map);
关于javascript - 从我的数据库加载谷歌地图标记，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/22560776/