这家伙在它发生时会做出一些后备。
http://jsfiddle.net/gogs/jwt9f1o3/
var apiGeolocationSuccess = function(position) {
alert("API geolocation success!\n\nlat = " + position.coords.latitude + "\nlng = " + position.coords.longitude);
};
var tryAPIGeolocation = function() {
jQuery.post( "https://www.googleapis.com/geolocation/v1/geolocate?key=AIzaSyDCa1LUe1vOczX1hO_iGYgyo8p_jYuGOPU", function(success) {
apiGeolocationSuccess({coords: {latitude: success.location.lat, longitude: success.location.lng}});
})
.fail(function(err) {
alert("API Geolocation error! \n\n"+err);
});
};
var browserGeolocationSuccess = function(position) {
alert("Browser geolocation success!\n\nlat = " + position.coords.latitude + "\nlng = " + position.coords.longitude);
};
var browserGeolocationFail = function(error) {
switch (error.code) {
case error.TIMEOUT:
alert("Browser geolocation error !\n\nTimeout.");
break;
case error.PERMISSION_DENIED:
if(error.message.indexOf("Only secure origins are allowed") == 0) {
tryAPIGeolocation();
}
break;
case error.POSITION_UNAVAILABLE:
alert("Browser geolocation error !\n\nPosition unavailable.");
break;
}
};
var tryGeolocation = function() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(
browserGeolocationSuccess,
browserGeolocationFail,
{maximumAge: 50000, timeout: 20000, enableHighAccuracy: true});
}
};
tryGeolocation();