本文介绍了谷歌地图API获取经纬度和替换标记?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
因此,当用户输入地址时,它添加了很好的标记,用户也可以将标记移动到新的位置并检索它的lat和lng。然而,它没有做的是:- 从地址获取lat和lng(当pin被添加到页面时)
- 如果地址改变,它会添加一个新的标记,而不是替换现有的标记。
以下是代码: p>
var map;
函数initMap(){
map = new google.maps.Map(document.getElementById('map'),{
zoom:8,
center:{lat: - 34.397,lng:150.644}
});
var geocoder = new google.maps.Geocoder();
document.getElementById('postcode')。addEventListener('keyup',function(){
geocodeAddress(geocoder,map);
});
}
函数geocodeAddress(geocoder,resultsMap){
var address = document.getElementById('address1')。value +'\xa0'+ document.getElementById('address2')。值+','+ document.getElementById('postcode')。value;
console.log(地址);
geocoder.geocode({'address':address},function(results,status){
if(status ==='OK'){
//如果标记存在,替换它
map.setCenter(results [0] .geometry.location);
var marker = new google.maps.Marker({
map:map,
position:results [0] .geometry.location,
title:address,
draggable:true,
//获取lng和lat并将其保存为2个独立变量?
} );
google.maps.event.addListener(marker,'dragend',function(marker){
var latLng = marker.latLng;
currentLatitude = latLng.lat();
currentLongitude = latLng.lng();
console.log(currentLatitude);
console.log(currentLongitude);
$(#latitude).val(currentLatitude);
$(#longitude).val(currentLongitude);
});
} else {
$('#error')。append('< div class =alert alert-danger>地址找不到请重试< / div>');
$(。alert-danger)。fadeOut(5000);
}
});
解决方案
地址(当引脚添加到页面中)时,您可以
lat = results [0] .geometry.location.lat() ;
lng = results [0] .geometry.location.lng();
用于更改标记而不是创建新标记,您可以定义globale(窗口级别)var标记并将前夕分配给此var创建标记的结果请记住setMap(null)用于隐藏旧标记
var marker;
var map;
if(marker!= null){
marker.setMap(null);
}
marker = new google.maps.Marker({
map:map,
position:results [0] .geometry.location,
title:address,
draggable:true,
//获取lng和lat并将其保存为2个独立变量?
});
So at the moment when user enter address it adds the marker which is fine, user can also move the marker to a new location and retrieve it's lat and lng. However what it doesn't do is:
- Get lat and lng from the address (when pin is added to page)
- If address changes it adds a new marker instead of replacing existing one.
Here's the code:
var map;
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
zoom: 8,
center: {lat: -34.397, lng: 150.644}
});
var geocoder = new google.maps.Geocoder();
document.getElementById('postcode').addEventListener('keyup', function() {
geocodeAddress(geocoder, map);
});
}
function geocodeAddress(geocoder, resultsMap) {
var address = document.getElementById('address1').value + '\xa0' + document.getElementById('address2').value +','+ document.getElementById('postcode').value;
console.log(address);
geocoder.geocode({'address': address}, function(results, status) {
if (status === 'OK') {
//if marker exist, replace it if not create it.
map.setCenter(results[0].geometry.location);
var marker = new google.maps.Marker({
map: map,
position: results[0].geometry.location,
title: address,
draggable:true,
//get lng and lat and save it to 2 seperate variables?
});
google.maps.event.addListener(marker, 'dragend', function(marker){
var latLng = marker.latLng;
currentLatitude = latLng.lat();
currentLongitude = latLng.lng();
console.log(currentLatitude);
console.log(currentLongitude);
$("#latitude").val(currentLatitude);
$("#longitude").val(currentLongitude);
});
} else {
$('#error').append('<div class="alert alert-danger">Address not found please try again</div>');
$(".alert-danger").fadeOut(5000);
}
});
}
解决方案
for Get lat and lng from the address (when pin is added to page) you can
lat = results[0].geometry.location.lat();
lng = results[0].geometry.location.lng();
for change the marker instead of create a new one you can define a globale (window level ) var marker and assign eve to this var the result for marker creation remember tor setMap(null) for hide the old marker
var marker;
var map;
if (marker != null) {
marker.setMap(null);
}
marker = new google.maps.Marker({
map: map,
position: results[0].geometry.location,
title: address,
draggable:true,
//get lng and lat and save it to 2 seperate variables?
});
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