我正在尝试对地名进行地理编码,但是当我运行该功能时,我得到了
我的控制台中的“空字符串”
下面是我的代码为什么会发生这种情况?
function getLatLong(address)
{
var geocoder = new google.maps.Geocoder();
var result = "";
geocoder.geocode( { 'address': address, 'region': 'uk' }, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
result = results[0].geometry.location;
} else {
result = "Unable to find address: " + status;
}
});
console.log(result);
}
更新
好的,所以我的值已经到了控制台,现在当我尝试将元素的值推入函数时,我将未定义为返回,下面是完整的代码,
function getLatLong(address)
{
var geocoder = new google.maps.Geocoder();
var result = "";
geocoder.geocode( { 'address': address, 'region': 'uk' }, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
result = results[0].geometry.location;
return result;
} else {
result = "Unable to find address: " + status;
alert(result);
}
});
}
//getLatLong("YORK");
function loadScript(postcode){
alert(postcode);
var script = document.createElement("script");
script.type = "text/javascript";
script.src = "http://maps.google.com/maps/api/js?sensor=false&callback=initialize?"+postcode;
document.body.appendChild(script);
}
/* load map on visitors location */
function initialize(postcode){
var myLatlng = new google.maps.LatLng(getLatLong(postcode));
var myOptions = {
center: myLatlng,
zoom:13,
disableDefaultUI: true,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(document.getElementById('map'), myOptions);
google.maps.event.trigger(map, 'resize');
map.setZoom(map.getZoom());
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
icon:'http://google-maps-icons.googlecode.com/files/home.png',
});
}
它被称为这样,
$(function(){
$("dd a, dt a").live("click", function(){
var self = $(this);
$("#overlay").fadeIn('slow');
var targetProcent = 85;
var targetWidth = $(window).width() * (targetProcent / 100);
var targetHeight = $(window).height() * (targetProcent / 100);
var targetX = ($(window).width() - targetWidth) / 2;
var targetY = ($(window).height() - targetHeight) / 2 + $(document).scrollTop();
$('#lightbox').height(700);
$('#lightbox').width(targetWidth);
$('#lightbox').load(self.attr("href"));
loadScript($("#postcode").val());
//usePointFromPostcode(document.getElementById('postcode').value, placeMarkerAtPoint)
$('#lightbox').css({
"position": "absolute",
"top": targetY+"px",
"left": targetX+"px"
}).fadeIn('slow');
return false;
});
});
$(“#postcode”)。val()与使用load()
时加载的元素有关答案 0 :(得分:4)
进行异步调用,然后打印到控制台。呼叫尚未返回
溶液:
将console.log移动到回调
修改强>
回调是您作为参数传递给地理编码的匿名函数,其签名为function(results, status)
您应该将console.log
调用放在该函数的END
为您的修改编辑:
你的脚本网址看起来错了:
"http://maps.google.com/maps/api/js?sensor=false&callback=initialize?"+postcode
我很确定坚持使用?邮政编码不会做任何事情。如果有的话,网址应该只包含一个?在查询参数开始之前。
您似乎想将邮政编码传递给initialize
函数,最简单的方法是通过全局变量。
在loadScript
函数中设置全局变量,并在initialize
函数中读取它