图层透明度

对图层进行透明度调节。setOpacity(value)。

源代码编辑器

<!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>图层的透明度调节</title>
    <meta name="description" content="对图层进行透明度调节。setOpacity(value)">
    <link rel="stylesheet" href="https://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css"/>
    <style>
        html,
        body,
        #container {
            width: 100%;
            height: 100%;
        }
    </style>
</head>
<body>
<div id="container"></div>
<div class="input-card" style="width: auto;">
    <div>
        <label>图层透明度：</label><span id="opa-val">-</span>
        <br>
        <input id="opacity" type="range" value="0.6" min="0" max="1" step="0.01" oninput="setOpacity(this.value)" onchange="setOpacity(this.value)">
    </div>
</div>
<script src="https://cache.amap.com/lbs/static/es5.min.js"></script>
<script src="https://webapi.amap.com/maps?v=2.0&key=您申请的key值"></script>
<script>
    var map = new AMap.Map('container', {
        center: [116.40, 39.91],
        features: ['road', 'bg'],
        zoom: 13
    });

    var opacity = 0.6;

    var satellite = new AMap.TileLayer.Satellite({
        map: map,
        opacity: opacity
    });

    updateOpa(opacity);

    function updateOpa(v) {
        document.getElementById('opa-val').innerText = v;
    }

    function setOpacity(val) {
        updateOpa(val);
        satellite.setOpacity(val);
    }
</script>
</body>
</html>

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