我有一个很简单的JS使用navigator。geolocation。getcurrentposition jammy。
$(document).ready(function(){
$("#business-locate, #people-locate").click(function() {
navigator.geolocation.getCurrentPosition(foundLocation, noLocation);
});
navigator.geolocation.getCurrentPosition(foundLocation, noLocation);
function foundLocation(position) {
var lat = position.coords.latitude;
var lon = position.coords.longitude;
var userLocation = lat + ', ' + lon;
$("#business-current-location, #people-current-location").remove();
$("#Near-Me")
.watermark("Current Location")
.after("<input type='hidden' name='business-current-location' id='business-current-location' value='"+userLocation+"' />");
$("#people-Near-Me")
.watermark("Current Location")
.after("<input type='hidden' name='people-current-location' id='people-current-location' value='"+userLocation+"' />");
}
function noLocation() {
$("#Near-Me").watermark("Could not find location");
$("#people-Near-Me").watermark("Could not find location");
}
})//end DocReady
基本上，这里发生的事情是我们得到当前位置，如果它得到了，两个“水印”被放置在两个字段中，表示“当前位置”，两个隐藏字段被创建，并使用latong数据作为它们的值(它们在开始时被删除，这样它们就不会每次都重复)。还有两个按钮，它们有一个点击功能，做同样的事情。
不幸的是，每隔三次左右，它就会奏效。
这里有什么问题?
以下是我的解决方案，感谢一个闭包:
function geoloc(success, fail){
var is_echo = false;
if(navigator && navigator.geolocation) {
navigator.geolocation.getCurrentPosition(
function(pos) {
if (is_echo){ return; }
is_echo = true;
success(pos.coords.latitude,pos.coords.longitude);
},
function() {
if (is_echo){ return; }
is_echo = true;
fail();
}
);
} else {
fail();
}
}
function success(lat, lng){
alert(lat + " , " + lng);
}
function fail(){
alert("failed");
}
geoloc(success, fail);
传递给geolocation . getcurrentposition()的第二个参数是要处理任何地理位置错误的函数。错误处理函数本身接收一个PositionError对象，其中包含关于地理定位尝试失败原因的详细信息。我建议输出错误到控制台，如果你有任何问题:
var positionOptions = { timeout: 10000 };
navigator.geolocation.getCurrentPosition(updateLocation, errorHandler, positionOptions);
function updateLocation(position) {
// The geolocation succeeded, and the position is available
}
function errorHandler(positionError) {
if (window.console) {
console.log(positionError);
}
}
Doing this in my code revealed the message "Network location provider at 'https://www.googleapis.com/' : Returned error code 400". Turns out Google Chrome uses the Google APIs to get a location on devices that don't have GPS built in (for example, most desktop computers). Google returns an approximate latitude/longitude based on the user's IP address. However, in developer builds of Chrome (such as Chromium on Ubuntu) there is no API access key included in the browser build. This causes the API request to fail silently. See Chromium Issue 179686: Geolocation giving 403 error for details.
