除了第一次设置cookie之外,还有一种方法可以检测用户是否已经授权navigator.geolocation返回浏览器的lat / long？
如果有,所有浏览器是不同的,在所有浏览器中是不同的？
这个问题已经是partially answered elsewhere
根据GeoLocation API – Chrome / Safari – Permission management and Visual Differences,Chrome要求可撤销一次性许可.我还没有阅读这篇文章,但似乎存储权限不是纯Chrome的事情.
解决方法
如何使用所有html5浏览器(支持geoLocation)支持的localStorage？
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(successFunction,errorFunction);
}
//Get latitude and longitude;
function successFunction(position) {
var lat = position.coords.latitude;
var long = position.coords.longitude;
localStorage['authorizedGeoLocation'] = 1;
}
function errorFunction(){
localStorage['authorizedGeoLocation'] = 0;
}
function checkauthorizedGeoLocation(){ // you can use this function to know if geoLocation was prevIoUsly allowed
if(typeof localStorage['authorizedGeoLocation'] == "undefined" || localStorage['authorizedGeoLocation'] == "0" )
return false;
else
return true;
}
然后您使用以下功能检查：
alert(checkauthorizedGeoLocation());
