我首先要说的是我对JS比较陌生,所以如果这很明显,请原谅我的无知。
我正在尝试将标记添加到Google地图中。我创建了一个数组coordList,然后使用地理编码api从地址中获取滞后和长并将它们推入coordList。
我现在正在尝试使用coordList数组在地图上绘制标记,但是我似乎无法从coordList数组中获取值。当我运行console.log(typeof coordList)时 - 它告诉我它是一个对象,但是当我用console.log(coordList)查看数组时,它看起来像一个普通的数组?
var coordList = [];
var address = [];
address.push('52+Kalynda+pde,+bohle+plains,+QLD')
address.push('51+Frank+St,+Kirwan+QLD+4817');
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
zoom: 12,
center: new google.maps.LatLng(-19.259854,146.8001348),
mapTypeId: 'roadmap'
});
}
function getLatLong(address){
var index;
for (index = 0; index < address.length; ++index) {
var request = 'https://maps.googleapis.com/maps/api/geocode/json?address=' + address[index] + '&key=[MY_key]';
$.getJSON( request, function( data ) {
var lat = data.results[0].geometry.location.lat;
var lng = data.results[0].geometry.location.lng;
var coords = [];
coords.push(lat);
coords.push(lng);
//push coords into coordList
coordList.push(coords);
});
}
}
// Loop through the results array and place a marker for each
// set of coordinates.
function addMarkers(coordList) {
for (var i = 0; i < coordList.length; i++) {
var coords = coordList[i];
var latLng = new google.maps.LatLng(coords[0],coords[1]);
var marker = new google.maps.Marker({
position: latLng,
map: map
});
}
}
getLatLong(address);
addMarkers(coordList);
答案 0 :(得分:1)
你的问题是$ .getJSON()是一个异步请求,你的代码在$ .getJSON()完成之前执行addMarkers(),所以coordList为空。
您可以在$ .getJSON()回调中添加标记。例如:
var address = [];
address.push('52+Kalynda+pde,+bohle+plains,+QLD')
address.push('51+Frank+St,+Kirwan+QLD+4817');
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
zoom: 12,
center: new google.maps.LatLng(-19.259854,146.8001348),
mapTypeId: 'roadmap'
});
}
function getLatLongAndAddMarkers(address){
var index;
for (index = 0; index < address.length; ++index) {
var request = 'https://maps.googleapis.com/maps/api/geocode/json?dress=' + address[index] + '&key=[MY_key]';
$.getJSON( request, function( data ) {
var latLong = new google.maps.LatLng(data.results[0].geometry.location);
//add markers here
var marker = new google.maps.Marker({
position: latLong,
map: map
});
});
}
}
getLatLongAndAddMarkers(address);