Question

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>

Answer 1

您只需要添加自动刷新Jscript即可。

<script language="javascript">
setTimeout(function(){
window.location.reload(1);
}, 5000);
</script>

Answer 2

您可以使用名为location.reload（true）的方法并将其设置为计时器，甚至在periodialExecuter函数中使用此方法中的重新加载，就像这样....

[ProtoContract]
public class CultureInfoSurrogate
{
    [ProtoMember(1)]
    public int CultureId { get; set; }

    public static implicit operator CultureInfoSurrogate(CultureInfo culture)
    {
        if (culture == null) return null;
        var obj = new CultureInfoSurrogate();
        obj.CultureId = culture.LCID;
        return obj;
    }

    public static implicit operator CultureInfo(CultureInfoSurrogate surrogate)
    {
        if (surrogate == null) return null;
        return new CultureInfo(surrogate.CultureId);
    }
}

这将每十秒钟重新加载一次页面......好像您自己加载浏览器一样

Javascript Google Maps API - 自动刷新/重新加载简单地图

2 个答案: