<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
<title>批量修改图层</title>
<link rel="stylesheet" href="https://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css"/>
<script src="https://webapi.amap.com/maps?v=1.4.15&key=您申请的key值"></script>
<script src='https://a.amap.com/jsapi_demos/static/citys.js'></script>
<style>
html,
body,
#container {
margin: 0;
padding: 0;
width: 100%;
height: 100%;
}
</style>
</head>
<body>
<div id="container"></div>
<div class="input-card" style="width: auto;">
<div class="input-item">
<button class="btn" onclick="layerGroup.show()">显示图层</button>
</div>
<div class="input-item">
<button class="btn" onclick="layerGroup.hide()">隐藏图层</button>
</div>
<div class="input-item">
<button class="btn" onclick="layerGroup.setOptions({ opacity: Math.random() })">随机修改图层透明度</button>
</div>
<div class="input-item">
<button class="btn" onclick="layerGroup.reload()">重载图层</button>
</div>
</div>
<script>
var map = new AMap.Map('container', {
resizeEnable: true,
center: [116.40, 39.91],
zoom: 13
});
var trafficLayer = new AMap.TileLayer.Traffic({
zIndex: 11
});
var roadNetLayer = new AMap.TileLayer.RoadNet({
zIndex: 10
});
var layerGroup = new AMap.LayerGroup([trafficLayer, roadNetLayer]);
layerGroup.setMap(map);
</script>
</body>
</html>
