我一直在使用以下谷歌地图示例代码。它显示了一个在城市上空盘旋的圈子，人口越多，圈子就越大。这段代码效果很好，但是......只有在我重新加载浏览器窗口时它才会重新加载。是否有更智能的方法使其自动刷新/重新加载？非常感谢！
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Circles</title>
<style>
html, body {
height: 100%;
margin: 0;
padding: 0;
}
#map {
height: 100%;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
// This example creates circles on the map, representing populations in North
// America.
// First, create an object containing LatLng and population for each city.
var citymap = {
chicago: {
center: {lat: 41.878, lng: -87.629},
population: 2714856
},
newyork: {
center: {lat: 40.714, lng: -74.005},
population: 8405837
},
losangeles: {
center: {lat: 34.052, lng: -118.243},
population: 3857799
},
vancouver: {
center: {lat: 49.25, lng: -123.1},
population: 603502
}
};
function initMap() {
// Create the map.
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 4,
center: {lat: 37.090, lng: -95.712},
mapTypeId: 'terrain'
});
// Construct the circle for each value in citymap.
// Note: We scale the area of the circle based on the population.
for (var city in citymap) {
// Add the circle for this city to the map.
var cityCircle = new google.maps.Circle({
strokeColor: '#FF0000',
strokeOpacity: 0.8,
strokeWeight: 2,
fillColor: '#FF0000',
fillOpacity: 0.35,
map: map,
center: citymap[city].center,
radius: Math.sqrt(citymap[city].population) * 100
});
}
}
</script>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
</script>
</body>
</html>
你可以使用一个名为location.reload（true）的方法并将其设置为一个计时器，甚至在periodialExecuter函数中使用此方法中的reload，就像这样......
new PeriodicalExecuter(function(pe) {
location.reload(true);
}, 10);
这将每十秒钟重新加载一次页面...就像您自己加载浏览器一样
您只需要添加自动刷新Jscript。
<script language="javascript">
setTimeout(function(){
window.location.reload(1);
}, 5000);
</script>