HTML5地理位置 - 无法在iOS上一直运行 [英] HTML5 Geolocation - Not working all the time on iOS
问题描述
目前正在使用HTML5地理位置，并且我已在所有网络浏览器上测试过它，并且它似乎正在工作。但是，当我在iPad上测试地理位置时，它始终适用于iPad mini，但是当我将它放在较大的iPad（iPad 2）上时，该位置似乎始终无法正常工作。
我正在尝试做这个网络端，以便该解决方案可以移植到多个平台，而不仅仅是iOS。
编辑：
只是没有在iOS应用程序中工作。
有人有任何想法，为什么它不起作用吗？
互联网：尝试了Wi-Fi并尝试了热点，并尝试开启Wi-Fi而未连接任何人。
iOS版本 8.3
地点应显示在这里：
$（＃status）。html（currentLat ++ currentLng）;
代码：
<！DOCTYPE html>
< html>
< head>
< script src =js / jquery-1.11.3.min.js>< / script>
< script>
//示例
$（document）.ready（function（）{
setInterval（function（）{
getLocation（function（position）{
// do
currentLat = position.coords.latitude;
currentLng = position.coords.longitude;
$（＃status）。html（currentLat + + currentLng）;
}）;
}，1000）;
}）;
var GPSTimeout = 10; // init global var注意：我注意到10给了我最快的结果，但是用这个数字来玩你自己喜欢的
//函数来调用你想要的位置回调（位置）
函数getLocation（回调）
{
if（navigator.geolocation）
{
var clickedTime =（new Date（））。getTime ）; //获取当前时间
GPSTimeout = 10; //重置超时以防万一你多次调用它
ensurePosition（callback，clickedTime）; //调用递归函数来获取位置
}
return true;
//递归位置函数
函数ensurePosition（回调，时间戳）
{
if（GPSTimeout< 6000）//设置为点你想放弃
{
//调用地理定位函数
navigator.geolocation.getCurrentPosition（
function（position）// on success
{
//如果返回的时间戳减去被调用时设置的时间大于0，那么位置是最新的
if（position.timestamp - timestamp> = 0）
{
GPSTimeout = 10; //重置超时以防万一
回调（位置）; //调用您创建的回调函数
}
else //返回的gps是不是当前的，需要刷新
{
GPSTimeout + = GPSTimeout; //增加超时本身n * 2
确保位置（回调，时间戳）; //调用自己刷新
}
}，
function（）//错误：gps失败，所以我们会再试一次
{
GPSTimeout + = GPSTimeout; //增加超时本身n * 2
ensurePosition（callback，timestamp）; //调用自己再试一次
}，
{maximumAge：0，timeout：GPSTimeout}
）
}
}
< / script>
< / head>
< body>
< div id =wrapper>
<！ - 页面标题 - >
< h1> Geolocation< / h1>
<！ - 状态 - >
< p>寻找您的位置：< span id =status>检查...< / span>< / p>
< / body>
< / html>
我以为你应该先获得地点的许可。
在中添加并给它一个字符串。 NSLocationWhenInUseUsageDescription 或 NSLocationAlwaysUsageDescription App-Info.plist
试试上面的内容，看看是否有帮助。
简单无计时器
<！DOCTYPE html>
< html>
< head>
< script src =http://code.jquery.com/jquery-1.11.3.min.js>< / script>
< / head>
< body>
< BR>< BR>< BR>
< button onclick =getLocation（）> get Location< / button>
< script>
函数getLocation（）{
if（navigator.geolocation）{
navigator.geolocation.getCurrentPosition（alertPosition）;
} else {
alert（不支持地理定位。）;
function alertPosition（position）{
alert（Latitude：+ position.coords.latitude +
< br>经度：+ position.coords.longitude）;
}
< / script>
< / body>
< / html>
Working currently with the HTML5 Geolocation and I've tested it on all web browsers and it seems to be working. However when I test the Geolocation on the iPad, it works for the iPad mini all the time, but when I put it on the bigger iPad (iPad 2) the location doesn't seem to work all the time.
I'm trying to do this web-side so that the solution can be ported over to multiple platforms and not just iOS.
Edit:
Just tried, It works in the safari browser but it's just not working inside the iOS application.
Does anyone have any ideas why it's not working?
Internet: Tried Wi-Fi and tried hotspot, and also tried Wi-Fi turned on without connecting to anyones.
iOS version: 8.3
The location should be displayed here:
$("#status").html(currentLat + " " + currentLng);
Code:
<!DOCTYPE html>
<html>
<head>
<script src="js/jquery-1.11.3.min.js"></script>
<script>
//example
$(document).ready(function(){
setInterval(function(){
getLocation(function(position) {
//do something cool with position
currentLat = position.coords.latitude;
currentLng = position.coords.longitude;
$("#status").html(currentLat + " " + currentLng);
});
}, 1000);
});
var GPSTimeout = 10; //init global var NOTE: I noticed that 10 gives me the quickest result but play around with this number to your own liking
//function to be called where you want the location with the callback(position)
function getLocation(callback)
{
if(navigator.geolocation)
{
var clickedTime = (new Date()).getTime(); //get the current time
GPSTimeout = 10; //reset the timeout just in case you call it more then once
ensurePosition(callback, clickedTime); //call recursive function to get position
}
return true;
}
//recursive position function
function ensurePosition(callback, timestamp)
{
if(GPSTimeout < 6000)//set at what point you want to just give up
{
//call the geolocation function
navigator.geolocation.getCurrentPosition(
function(position) //on success
{
//if the timestamp that is returned minus the time that was set when called is greater then 0 the position is up to date
if(position.timestamp - timestamp >= 0)
{
GPSTimeout = 10; //reset timeout just in case
callback(position); //call the callback function you created
}
else //the gps that was returned is not current and needs to be refreshed
{
GPSTimeout += GPSTimeout; //increase the timeout by itself n*2
ensurePosition(callback, timestamp); //call itself to refresh
}
},
function() //error: gps failed so we will try again
{
GPSTimeout += GPSTimeout; //increase the timeout by itself n*2
ensurePosition(callback, timestamp);//call itself to try again
},
{maximumAge:0, timeout:GPSTimeout}
)
}
}
</script>
</head>
<body>
<div id="wrapper">
<!-- Page heading -->
<h1>Geolocation</h1>
<!-- Status -->
<p>Finding your location: <span id="status">checking...</span></p>
</body>
</html>
I thought you should get location's permission first.
Add NSLocationWhenInUseUsageDescription or NSLocationAlwaysUsageDescription in App-Info.plist and give it a string.
Try with above, and see if that helps.
simple for no timer
<!DOCTYPE html>
<html>
<head>
<script src="http://code.jquery.com/jquery-1.11.3.min.js"></script>
</head>
<body>
<BR><BR><BR><BR>
<button onclick="getLocation()">get Location</button>
<script>
function getLocation() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(alertPosition);
} else {
alert("Geolocation is not supported.");
}
}
function alertPosition(position) {
alert("Latitude: " + position.coords.latitude +
"<br>Longitude: " + position.coords.longitude);
}
</script>
</body>
</html>
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