高德地图进阶开发实战案例(3):标注、信息弹窗和清除覆盖物

 var map = new AMap.Map("container", {resizeEnable: true});
    var lnglats = [
        [116.368904, 39.923423],
        [116.382122, 39.921176],
        [116.387271, 39.922501],
        [116.398258, 39.914600]
    ];
    var infoWindow = new AMap.InfoWindow({offset: new AMap.Pixel(0, -30)});
    var markers = [];//标注点信息集合
    for (var i = 0, marker; i < lnglats.length; i++) {
        var marker = new AMap.Marker({
            position: lnglats[i],
            map: map
        });
        marker.content = '我是第' + (i + 1) + '个Marker';
        marker.on('click', markerClick);
        // marker.emit('click', {target: marker});
        markers.push(marker);
    }
    function markerClick(e) {
        infoWindow.setContent(e.target.content);
        infoWindow.open(map, e.target.getPosition());
    }
    map.setFitView();
    // 创建覆盖物群组，并将 marker 传给 OverlayGroup
    var overlayGroups = new AMap.OverlayGroup(markers);
    //清除标注;
    function clearMaker() {
        map.remove(markers)
        markers = [];
    }
    //清除覆盖物;
    document.getElementById('btn').onclick = function () {
        clearMaker();
    }