我有一个获得经度和纬度的代码，我很难理解如何获取当前的地理位置并自动显示它。我想获得城市，州名
下面是代码
<head>
<title>Geolocation</title>
</head>
<body>
<div class="container">
<header class="navbar">
<div class="navbar-inner">
<a class="brand" href="/">Geolocation</a>
</div>
</header>
<div id="locationDemo">
{{> location}}
</div>
</div>
</body>
<template name="location">
<div>
Lat: {{lat}}
</div>
<div>
Lon: {{lon}}
</div>
</template>
的javascript
_lat = {
current: 0,
dep: new Deps.Dependency,
get: function(){
this.dep.depend();
if(this.current === 0){
getLocation();
}
return this.current;
},
set: function(value){
this.current = value;
this.dep.changed();
Deps.flush();
return this.current;
}
};
_lon = {
current: 0,
dep: new Deps.Dependency,
get: function(){
this.dep.depend();
if(this.current === 0){
getLocation();
}
return this.current;
},
set: function(value){
this.current = value;
this.dep.changed();
Deps.flush();
return this.current;
}
};
function getLocation(){
if (navigator.geolocation)
{
navigator.geolocation.getCurrentPosition(showPosition, showError);
}
else{
console.log("Geolocation is not supported by this browser.");
}
}
function showPosition(position)
{
_lat.set(position.coords.latitude);
_lon.set(position.coords.longitude);
}
function showError(error) {
switch(error.code) {
case error.PERMISSION_DENIED:
console.log("User denied the request for Geolocation.");
break;
case error.POSITION_UNAVAILABLE:
console.log("Location information is unavailable.");
break;
case error.TIMEOUT:
console.log("The request to get user location timed out.");
break;
case error.UNKNOWN_ERROR:
console.log("An unknown error occurred.");
break;
}
}
Meteor.setInterval(function() {
navigator.geolocation.getCurrentPosition(function(position) {
Session.set('lat', position.coords.latitude);
Session.set('lon', position.coords.longitude);
});
}, 5000);
Template.location.helpers({
lat: function() { return Session.get('lat'); },
lon: function() { return Session.get('lon'); }
});
meteorpad上的代码