Javascript 清除引出序号google maps:未捕获引用错误:未定义标记
我创建了一个切换来清除地图上的所有标记。单击该切换时,它将调用getMapVisit() 当我单击切换时出现此错误:Javascript 清除引出序号google maps:未捕获引用错误:未定义标记,javascript,ajax,google-maps,google-maps-api-3,Javascript,Ajax,Google Maps,Google Maps Api 3,我创建了一个切换来清除地图上的所有标记。单击该切换时,它将调用getMapVisit() 当我单击切换时出现此错误: Uncaught ReferenceError: markers is not defined 在下面用星号标记的行上的javascript代码中: function load() { var map = new google.maps.Map(document.getElementById("map"), { zoom: 13,
Uncaught ReferenceError: markers is not defined
在下面用星号标记的行上的javascript代码中:
function load() {
var map = new google.maps.Map(document.getElementById("map"), {
zoom: 13,
mapTypeId: 'roadmap'
});
var infoWindow = new google.maps.InfoWindow;
// Change this depending on the name of your PHP file
downloadUrl("getMapMarkers.php", function(data) {
var bounds = new google.maps.LatLngBounds();
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 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/>" ;
var icon = customIcons[type] || {};
var marker = new google.maps.Marker({
map: map,
position: point,
icon: icon.icon,
shadow: icon.shadow
});
bindInfoWindow(marker, map, infoWindow, html);
bounds.extend(point);
}
map.fitBounds(bounds);
});
}
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 getMapVisit()
{
alert("in clear new clear al lmarkers");
//clear markers
clearOverlays();
markers = [];
return false;
}
function clearOverlays() {
setAllMap(null);
}
function setAllMap(map) {
for (var i = 0; i < markers.length; i++) { **************
markers[i].setMap(map);
}
}
function doNothing() {}
函数加载(){
var map=new google.maps.map(document.getElementById(“map”){
缩放:13,
mapTypeId:“路线图”
});
var infoWindow=new google.maps.infoWindow;
//根据PHP文件的名称更改此选项
下载URL(“getMapMarkers.php”,函数(数据){
var bounds=new google.maps.LatLngBounds();
var xml=data.responseXML;
var markers=xml.documentElement.getElementsByTagName(“标记”);
对于(var i=0;i”;
var icon=customIcons[type]| |{};
var marker=new google.maps.marker({
地图:地图,
位置:点,,
icon:icon.icon,
阴影:icon.shadow
});
bindInfoWindow(标记、地图、infoWindow、html);
扩展(点);
}
映射边界(bounds);
});
}
函数bindInfoWindow(标记、地图、infoWindow、html){
google.maps.event.addListener(标记'click',函数(){
setContent(html);
信息窗口。打开(地图、标记);
});
}
函数下载url(url,回调){
var请求=window.ActiveXObject?
新的ActiveXObject('Microsoft.XMLHTTP'):
新的XMLHttpRequest;
request.onreadystatechange=函数(){
if(request.readyState==4){
request.onreadystatechange=doNothing;
回调(请求、请求、状态);
}
};
打开('GET',url,true);
请求发送(空);
}
函数getMapVisit()
{
警报(“在清除新的清除标记中”);
//清晰标记
clearOverlays();
标记=[];
返回false;
}
函数clearOverlays(){
setAllMap(空);
}
函数setAllMap(映射){
对于(var i=0;i
显示地图和切换的我的php是:
$page->content .= '<p> <h3> Your Beer Map
<form class="form-horizontal pull-right" style="width: 400px !important; padding-right: 20px !important;">
<div class="control-group">
<div class="controls btn disabled switch switch-two">
<input id="week9" name="view" type="radio" checked>
<label for="week9" onclick="getMapDrank()">Drank Beer From</label>
<input id="month10" name="view" type="radio">
<label for="month10" onclick="getMapVisit()">Visited</label>
<span class="slide-button btn btn-warning"></span>
</div>
</div>
</form>
</h3>
</p>';
$page->content .= '<div id="map" style="width: 700px; height: 500px"></div>';
$page->content.='你的啤酒地图
喝啤酒
拜访
';
$page->content.='';
标记
是downloadUrl()回调函数中的局部变量。看起来您希望它是一个全局变量。您可以尝试在任何函数之外的最顶端添加此行:
var markers = [];
并在downloadUrl()
回调中从以下位置更改此行:
var markers = xml.documentElement.getElementsByTagName("marker");
致:
这可能不是代码中的唯一问题,但无论如何,这是一个问题。这消除了我的错误,但并没有清除所有标记。还有什么我可能错过的吗?
markers = xml.documentElement.getElementsByTagName("marker");