<!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,#allmap {width: 100%;height: 100%;overflow: hidden;margin:0;font-family:"微软雅黑";} </style> <script type="text/javascript" src="http://api.map.baidu.com/getscript?v=2.0&ak=E243c03006de5c71a59f896471a64199"></script> <script type="text/javascript" src="http://api.map.baidu.com/library/CurveLine/1.5/src/CurveLine.min.js"></script> <title>折线上添加方向箭头</title> </head> <body> <div id="allmap"></div> </body> </html> <script type="text/javascript"> // 百度地图API功能 var map = new BMap.Map("allmap"); // 创建Map实例 map.centerAndZoom(new BMap.Point(116.404, 39.915), 14); // 初始化地图,设置中心点坐标和地图级别 map.enableScrollWheelZoom(true); //开启鼠标滚轮缩放 var mapStyle ={ style : ‘midnight‘, }; map.setMapStyle(mapStyle); var sy = new BMap.Symbol(BMap_Symbol_SHAPE_BACKWARD_OPEN_ARROW, { scale: 0.6,//图标缩放大小 strokeColor:‘#fff‘,//设置矢量图标的线填充颜色 strokeWeight: ‘2‘,//设置线宽 }); var icons = new BMap.IconSequence(sy, ‘10‘, ‘30‘); // 创建polyline对象 var pois = [ new BMap.Point(116.350658,39.938285), new BMap.Point(116.386446,39.939281), new BMap.Point(116.389034,39.913828), new BMap.Point(116.442501,39.914603) ]; var polyline =new BMap.Polyline(pois, { enableEditing: false,//是否启用线编辑，默认为false enableClicking: true,//是否响应点击事件，默认为true icons:[icons], strokeWeight:‘8‘,//折线的宽度，以像素为单位 strokeOpacity: 0.8,//折线的透明度，取值范围0 - 1 strokeColor:"#18a45b" //折线颜色 }); var startPoint=new BMap.Point(116.432045,39.910683), middlePoint=new BMap.Point(116.395645,39.93397), endPoint=new BMap.Point(116.416917,39.888588); var points = [startPoint,middlePoint, endPoint]; var curve = new BMapLib.CurveLine(points, {strokeColor:"blue", strokeWeight:3, strokeOpacity:0.5}); //创建弧线对象 map.addOverlay(curve); //添加到地图中 curve.enableEditing(); //开启编辑功能 map.addOverlay(polyline);//增加折线 </script>
原文：https://www.cnblogs.com/mike-mei/p/12853204.html