有没有办法检测用户是否已经授予使用 navigator.geolocation 的权限? [英] Is there a way of detecting whether a user has already given permission to use navigator.geolocation?

问题描述

除了第一次设置cookie之外，有没有办法检测用户是否已经允许navigator.geolocation返回浏览器的纬度/经度?

Apart from setting a cookie the first time round, is there a way of detecting whether a user has already given permission for navigator.geolocation to return the lat/long of the browser?

如果有，它是什么?它在所有浏览器中都相同还是在所有浏览器中不同?

If there is, what is it and is it the same across all browsers or different across all browsers?

此主题已在其他地方部分回答

根据 GeoLocation API – Chrome/Safari – 权限管理和视觉差异，Chrome 请求可撤销的一次性权限.我还没有读完这篇文章，但似乎权限存储并不是纯 Chrome 要做的事情.

According to GeoLocation API – Chrome / Safari – Permission management and Visual Differences, Chrome asks for a revokable one-time permission. I haven't finished reading the article, but it would seem that storage of permissions is not a purely-Chrome thing to do.

推荐答案

如何使用localStorage 应该被所有html5浏览器支持(支持geoLocation)

What about using localStorage which should be supported by all html5 browsers (that support geoLocation)

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进行检查:

And then you check using the below function :

alert(checkauthorizedGeoLocation());

这是 jsfiddle 如果您需要检查

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