百度地图删除指定折线覆盖物

img

怎么删除指定的折线，现在删除不了，下面注释的地方是删除全部折线的，我想要的是删除指定的折线

看代码没问题，data查询出来了吗？console.log那句打印出内容了吗？
用下面的代码在百度官网网址下运行是没问题的，感觉题主的data没查询到内容

img

https://lbsyun.baidu.com/jsdemo.htm#dAddClearOverlay

<!DOCTYPE html>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
    <style type="text/css">
    body, html {
        width: 100%;
        height: 100%;
        margin: 0;
    }
    #allmap {
        height: 100%;
        width: 100%;
    }
    ul li {
        list-style: none;
    }
    .btn-wrap {
        z-index: 999;
        position: fixed;
        bottom: 3.5rem;
        margin-left: 3rem;
        padding: 1rem 1rem;
        border-radius: .25rem;
        background-color: #fff;
        box-shadow: 0 2px 6px 0 rgba(27, 142, 236, 0.5);
    }
    .btn {
        width: 75px;
        height: 30px;
        float: left;
        background-color: #fff;
        color: rgba(27, 142, 236, 1);
        font-size: 14px;
        border:1px solid rgba(27, 142, 236, 1);
        border-radius: 5px;
        margin: 0 5px;
        text-align: center;
        line-height: 30px;
    }
    .btn:hover {
        background-color: rgba(27, 142, 236, 0.8);
        color: #fff;
    }
</style>
    <script type="text/javascript" src="//api.map.baidu.com/api?type=webgl&v=1.0&ak=您的密钥"></script>
    <title>添加/清除覆盖物</title>
</head>
<body>
    <div id="allmap"></div>
    <ul class="btn-wrap" style="z-index: 99;">
        <li class = "light btn" onclick = "addOverlay()">添加覆盖物</li>
        <li class = "night btn" onclick = "removeOverlay()">清除覆盖物</li>
    </ul>
</body>
</html>
    <script type="text/javascript">
    var map = new BMapGL.Map('allmap');
    var point = new BMapGL.Point(116.404, 39.915);
    map.centerAndZoom(point, 15);
    arrData=[[
        new BMapGL.Point(116.399, 39.910),
        new BMapGL.Point(116.405, 39.920),
        new BMapGL.Point(116.425, 39.900)
   ],[
        new BMapGL.Point(116.399, 39.911),
        new BMapGL.Point(116.405, 39.922),
        new BMapGL.Point(116.425, 39.903)
   ]];
      lineArr=[]
for(var id=0;id<arrData.length;id++){
arr=arrData[id];
    var polyline = new BMapGL.Polyline(arr, {
        strokeColor: 'blue',
        strokeWeight: 2,
        strokeOpacity: 0.5
    });
  map.addOverlay(polyline);
  lineArr.push({id,polyline})
  
}
      console.log(lineArr)
    // 清除覆盖物
    function removeOverlay() {
      var data=lineArr.find(item=>item.id==1);//删除id为1的线
      console.log(data)
      map.removeOverlay(data.polyline)
    }
    </script>