自适应显示多个点标记

撞见多个Marker,通过Map.setFitView自动适配地图级别和中心,使点标记同时显示在视野内。

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>自适应显示多个点标记</title>
 <link rel="stylesheet" href="https://a.amap.com/jsapi_demos/static/demo-center/css/demo-center.css"/>
 <style>
 html, body, #container {
 height: 100%;
 width: 100%;
 }
 .amap-icon img{
 width: 25px;
 height: 34px;
 }
 </style>
</head>
<body>
<div id="container"></div>
<div class="input-card">
 <h4>地图自适应</h4>
 <input id="setFitView" type="button" class="btn" value="地图自适应显示" />
</div>
<div class="info">
 <div id="centerCoord"></div>
 <div id="tips"></div>
</div>
<script type="text/javascript"
 src="https://webapi.amap.com/maps?v=2.0&key=您申请的key值"></script>
<script type="text/javascript">
 var map = new AMap.Map('container', {
 resizeEnable: true,
 center: [116.397428, 39.90923],
 zoom: 13
 });
 map.clearMap(); // 清除地图覆盖物
 var markers = [{
 icon: '//a.amap.com/jsapi_demos/static/demo-center/icons/poi-marker-1.png',
 position: [116.205467, 39.907761]
 }, {
 icon: '//a.amap.com/jsapi_demos/static/demo-center/icons/poi-marker-2.png',
 position: [116.368904, 39.913423]
 }, {
 icon: '//a.amap.com/jsapi_demos/static/demo-center/icons/poi-marker-3.png',
 position: [116.305467, 39.807761]
 }];
 // 添加一些分布不均的点到地图上,地图上添加三个点标记,作为参照
 markers.forEach(function(marker) {
 new AMap.Marker({
 map: map,
 icon: marker.icon,
 position: [marker.position[0], marker.position[1]],
 offset: new AMap.Pixel(-13, -30)
 });
 });
 var center = map.getCenter();
 var centerText = '当前中心点坐标:' + center.getLng() + ',' + center.getLat();
 document.getElementById('centerCoord').innerHTML = centerText;
 document.getElementById('tips').innerHTML = '成功添加三个点标记,其中有两个在当前地图视野外!';
 var setFitViewBtn = document.getElementById('setFitView');
 // 添加事件监听, 使地图自适应显示到合适的范围
 setFitViewBtn.onclick = function() {
 // 第一个参数为空,表明用图上所有覆盖物 setFitview
 // 第二个参数为false, 非立即执行
 // 第三个参数设置上左下右的空白
 map.setFitView(null, false, [150, 60, 100, 60]);
 var newCenter = map.getCenter();
 document.getElementById('centerCoord').innerHTML = '当前中心点坐标:' + newCenter.toString();
 document.getElementById('tips').innerHTML = '通过setFitView,地图自适应显示到合适的范围内,点标记已全部显示在视野中!';
 };
</script>
</body>
</html>
 
 

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