更新Google地图流量图层,无需重新加载页面 [英] Update Google Maps traffic layer without page reloading
问题描述
我将Google地图嵌入到我的网页中:
< script async defer src =https:// maps .googleapis.com /地图/ API / JS键=安培;回调= initMap>< /脚本>
我使用initMap js函数来初始化映射:
函数initMap(){
var map = new google.maps.Map(document.getElementById('t-map'),{
zoom :13,
center:{
lat:39.103119,
lng:-84.512016,
},
disableDefaultUI:true,
});
var trafficLayer = new google.maps.TrafficLayer();
trafficLayer.setMap(map);
}
我希望流量层在x时间后自动更新,无需重新加载页。我怎么去做这件事?
解决方案因为目前TrafficLayer似乎会通过地图 - 将需要强制API重新加载地图图块。
实现它的一种可能方法:设置随机地图样式(这不会影响地图样式的出现)
函数initMap(){var map = new google.maps.Map(document.getElementById('t-map'), {zoom:13,center:{lat:38.9071923,lng:-77.0368707,},disableDefaultUI:true,}); var trafficLayer = new google.maps.TrafficLayer(); trafficLayer.setMap(地图); setInterval(function(){map.setOptions({styles:[{featureType:road,elementType:geometry.fill,stylers:[{saturation:Math.random()}] }}},15000 //每15秒重新加载磁贴);} google.maps.event.addDomListener(window,'load',initMap);
html,body,#t-map {height:100%;保证金:0; padding:0}
< div id =t- map>< / div>< script src =https://maps.googleapis.com/maps/api/js?v=3>< / script>
问题:根据浏览器/地图尺寸/连接的不同,被重新加载。
I have a Google Maps embedded into my page:
<script async defer src="https://maps.googleapis.com/maps/api/js?key=&callback=initMap"></script>
I use the initMap js function to initialize the map:
function initMap() {
var map = new google.maps.Map(document.getElementById('t-map'), {
zoom: 13,
center: {
lat: 39.103119,
lng: -84.512016,
},
disableDefaultUI: true,
});
var trafficLayer = new google.maps.TrafficLayer();
trafficLayer.setMap(map);
}
I want the traffic layer to update automatically after x amount of time without reloading the page. How would I go about doing this?
As it seems the TrafficLayer currently will be drawn via the map-tiles, so you would need to force the API to reload the map-tiles.
A possible way to achieve it: set a random map-style(which doesn't affect the appeareance of the tiles)
function initMap() {
var map = new google.maps.Map(document.getElementById('t-map'), {
zoom: 13,
center: {
lat: 38.9071923,
lng: -77.0368707,
},
disableDefaultUI: true,
});
var trafficLayer = new google.maps.TrafficLayer();
trafficLayer.setMap(map);
setInterval(function() {
map.setOptions({
styles: [{
"featureType": "road",
"elementType": "geometry.fill",
"stylers": [{
"saturation": Math.random()
}]
}]
})
},
15000 //reload tiles every 15 sec
);
}
google.maps.event.addDomListener(window, 'load', initMap);
html,
body,
#t-map {
height: 100%;
margin: 0;
padding: 0
}
<div id="t-map"></div>
<script src="https://maps.googleapis.com/maps/api/js?v=3"></script>
The issue: depending on the browser/map-size/connection a flickering may hapen when the tiles will be reloaded.
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