Google地图:从JSON加载标记 [英] Google Maps: load markers from JSON
问题描述
我有以下JS处理表单,将结果作为JSON返回,然后应该将json绘制为地图上的标记。尽管我确实得到了json响应,但没有绘制任何内容。我不是很熟悉Javascript,所以有人可以告诉我下面的错误是什么?
谢谢
< JSON:
[
{
lat:53.598660370500596,
lng:-113.59166319101564
}
]
Javascript
$(function(){
$('#search')。click(function(){
var projectNumber = $('#project_number')。val();
var setdistance = $('#setdistance')。val();
var companyType = $('#company_type') .val();
//语法 - $ .post('filename',{data},function(response){});
$ .post('business_location_get_map.php' ,{
project_number:projectNumber,
setdistance:setdistance,
company_type:companyType
},function(ret){
$('#result')。html ret);
});
});
});
函数initialize(){
var mapOptions = {
center:new google.maps.LatLng(53.5435640000,-113.5),
zoom:8
};
var map = new google.maps.Map(document.getElementById(map_canvas),
mapOptions);
}
google.maps.event.addDomListener(window,'load',initialize);
function plot(){
$ .getJSON('business_location_get_map.php',function(data){
var location;
$ .each(data,function (key,val){
addMarker(key.lat,key.lng);
});
});
函数addMarker(lat,lng){
marker = new google.maps.Marker({
position:new google.maps.LatLng(lat, lng),
map:地图,
图标:redImage
});
markersArray.push(marker);
}
google.maps.event.addDomListener('search','click',plot);
编辑:
我改变了
(key.lat,key.lng)
至
(val.lat,val.lng)
我仍然有同样的结果,
key.lng
至 addMarker()
,但是 key
是数组中当前元素的索引。您必须使用 val
,因为这是实际值: $。each (数据,函数(key,val){
addMarker(val.lat,val.lng);
});
有关 $。each()
: https://api.jquery.com/each/
I have the following JS which processes a form, returns the results as JSON and then should plot the json as markers on the map. Although I do get a json response, nothing is plotted. I'm not very familiar with Javascript, so could someone let me know what the error is below?
Thanks
The JSON:
[
{
"lat": "53.598660370500596",
"lng": "-113.59166319101564"
}
]
The Javascript
$(function () {
$('#search').click(function () {
var projectNumber = $('#project_number').val();
var setdistance = $('#setdistance').val();
var companyType = $('#company_type').val();
//syntax - $.post('filename', {data}, function(response){});
$.post('business_location_get_map.php', {
project_number: projectNumber,
setdistance: setdistance,
company_type: companyType
}, function (ret) {
$('#result').html(ret);
});
});
});
function initialize() {
var mapOptions = {
center: new google.maps.LatLng(53.5435640000, -113.5),
zoom: 8
};
var map = new google.maps.Map(document.getElementById("map_canvas"),
mapOptions);
}
google.maps.event.addDomListener(window, 'load', initialize);
function plot() {
$.getJSON('business_location_get_map.php', function (data) {
var location;
$.each(data, function (key, val) {
addMarker(key.lat, key.lng);
});
});
}
function addMarker(lat, lng) {
marker = new google.maps.Marker({
position: new google.maps.LatLng(lat, lng),
map: map,
icon: redImage
});
markersArray.push(marker);
}
google.maps.event.addDomListener('search', 'click', plot);
EDIT:
I've changed
(key.lat, key.lng)
to
(val.lat, val.lng)
I still have the same results,
The problem is about $.each()
You are passing key.lat
and key.lng
to addMarker()
, however key
is the index of the current element in array. You must use val
as it's the real value:
$.each(data, function (key, val) {
addMarker(val.lat, val.lng);
});
More info about the usage of $.each()
: https://api.jquery.com/each/
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