百度地图之多点步行路径连线问题

原文：http://www.cnblogs.com/wujy/p/3897501.html#undefined

一:通过结合下面两个百度实例来实现我们所要求的功能;

1:两点间步行实例:http://developer.baidu.com/map/jsdemo.htm#i6_1 

2:折线实例:http://developer.baidu.com/map/jsdemo.htm#c1_5

二:多点步行路径连线实例（完整的代码如下，都有相应说明,实例定义三个点）

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左边是使用步行接口显示的三点连线地图,两点间都会标识起点跟终点,所以要是有多点地图上就会出现很为起点、终点的标志；右边这张是通过修改以后的地图；

编辑修改于2014-08-12

上面实例中会存在一个问题,因为如果我们存在有多点情况下会进行for循环把每两个点的路线画出来,并得到这种路线的坐标集合;不过因为获取坐标集合百度地图API是通过回调函数实现;这边不得不面对一个FOR循环里包含回调方法,导致获得坐标集合顺序会出现问题;会出现如下图那样,有些点之间错乱,图在多出一些直接;

结合上面出现的问题对相应代码进行调整:

起点:途经点(以"|"进行分隔):终点:

结果显示:

步行路径图:

修改后的路径图:

主要是这里要注意(在回调过程中直接把直线画出来,不用再去获取两点间的坐标集合再去画线):

var pts = walking.getResults().getPlan(0).getRoute(0).getPath();
maps.addOverlay(new BMap.Polyline(pts, { strokeColor: "green", strokeWeight: 2, strokeOpacity: 1 }));

效果图如下：

 上面修改后的图片可以对文字跟气泡进行再处理效果如下：

主要修改JS代码如下：

                    $.each(abc, function (item, value) {var firstPoint = new BMap.Point(value.lan, value.yan);//var startIcon = new BMap.Icon("ic_map_location.png", new BMap.Size(45, 45));//var m1 = new BMap.Marker(firstPoint, { icon: startIcon, offset: new BMap.Size(-8, -15) });var m1 = new BMap.Marker(firstPoint);maps.addOverlay(m1);var lab1 = new BMap.Label(item + 1, { position: firstPoint, offset: new BMap.Size(-10, -25) });lab1.setStyle({color: "#fff",fontSize: "16px",backgroundColor: "0.05",border: "0",fontWeight: "bold"});maps.addOverlay(lab1);});

编辑修改于2014-08-18

针对上面第二种是没有把线路坐标集合保存到数据库中,这样会出现每次页面加载都去百度那边进行获得坐标集合,针对这种情况进行修改,虽然FOR回调函数会出现错乱的问题,但这边可以加个标识让它显示出每一段集合是所属顺序,然后再进行合并出正确集合点;

Handler3代码如下:

using Newtonsoft.Json;
namespace WebApplication1
{/// 
/// Handler3 的摘要说明/// 
public class Handler3 : IHttpHandler{public void ProcessRequest(HttpContext context){string start = context.Request["SpointArray"];string PointIndex = context.Request["PointIndex"];List list = JsonConvert.DeserializeObject>(start);List newList = new List();foreach (var item in list){bool result = newList.Where(o => o.lng == item.lng && o.lat == item.lat).Count()== 0;if (result){newList.Add(item);}}FileText.WriteString(start + "|" + PointIndex);string newResult = "";foreach (var item in newList){//保存到数据库中,顺序标识也要保存起来PointIndexnewResult += "new ResultList(){lng=" + item.lng + ",lat=" + item.lat + "},";}FileText.WriteString("修改后的结节:" + newResult);context.Response.Write("Hello World");}public bool IsReusable{get{return false;}}}public class ResultList{public double lng { get; set; }public double lat { get; set; }}
}

显示代码如下:

Handler4代码如下(要按标识顺序读出坐标点集合):

using Newtonsoft.Json;namespace WebApplication1
{/// 
/// Handler4 的摘要说明/// 
public class Handler4 : IHttpHandler{public void ProcessRequest(HttpContext context){List newList = new List(){//从数据库获得顺序集合new ResultList(){lng=118.07572,lat=24.456086},new ResultList(){lng=118.075747,lat=24.455756},new ResultList(){lng=118.075728,lat=24.455776},new ResultList(){lng=118.075698,lat=24.455776},new ResultList(){lng=118.075628,lat=24.455775},new ResultList(){lng=118.075419,lat=24.455712},new ResultList(){lng=118.075269,lat=24.455641},new ResultList(){lng=118.075388,lat=24.455422},new ResultList(){lng=118.075518,lat=24.455114},new ResultList(){lng=118.075528,lat=24.455094},new ResultList(){lng=118.075648,lat=24.454865},new ResultList(){lng=118.075768,lat=24.454656},new ResultList(){lng=118.075848,lat=24.454497},new ResultList(){lng=118.075858,lat=24.454427},new ResultList(){lng=118.075848,lat=24.454357},new ResultList(){lng=118.075818,lat=24.454226},new ResultList(){lng=118.075788,lat=24.454246},new ResultList(){lng=118.075768,lat=24.454256},new 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ResultList(){lng=118.08082,lat=24.451554},new ResultList(){lng=118.080711,lat=24.451464},new ResultList(){lng=118.08067,lat=24.451434},new ResultList(){lng=118.080611,lat=24.451393},new ResultList(){lng=118.080521,lat=24.451383},new ResultList(){lng=118.080451,lat=24.451413},new ResultList(){lng=118.080381,lat=24.451453},new ResultList(){lng=118.080321,lat=24.451522},new ResultList(){lng=118.080171,lat=24.451721},new ResultList(){lng=118.079792,lat=24.452339},new ResultList(){lng=118.079761,lat=24.452378},new ResultList(){lng=118.079722,lat=24.452418},new ResultList(){lng=118.079692,lat=24.452439}};string strSerializeJSON = JsonConvert.SerializeObject(newList);context.Response.Write(strSerializeJSON);}public bool IsReusable{get{return false;}}}
}

效果图:

另：给标记点增加点击事件并弹窗（注要用到的openInfoWindow，其中enableMessage:false是把窗口上的小手机关闭）；

$.each(abc, function (item, value) {var firstPoint = new BMap.Point(value.lan, value.yan);//var startIcon = new BMap.Icon("ic_map_location.png", new BMap.Size(45, 45));//var m1 = new BMap.Marker(firstPoint, { icon: startIcon, offset: new BMap.Size(-8, -15) });var m1 = new BMap.Marker(firstPoint);var infoWindow = new BMap.InfoWindow("当前第"+(item+1)+"景点：厦门海底世界", { enableMessage: false, width: 30, height: 20 });m1.addEventListener("click", function (){this.openInfoWindow(infoWindow);});maps.addOverlay(m1);var lab1 = new BMap.Label(item + 1, { position: firstPoint, offset: new BMap.Size(-10, -25) });lab1.setStyle({color: "#fff",fontSize: "16px",backgroundColor: "0.05",border: "0",fontWeight: "bold"});maps.addOverlay(lab1);});

编辑修改于2014-08-27

针对弹出提示窗在For里面要使用JS的闭包功能，否则会出现所有提示全部变成最后一个，代码如下：

 for (var i = 0; i < result.length; i++) {var firstPoint = new BMap.Point(result[i].PointLng, result[i].PointLat);var m1 = new BMap.Marker(firstPoint);var winfowText = "[途经点]:" + result[i].PointLable;var labText = result[i].PointOrder;if (result[i].PointType == "0" || result[i].PointType == "1") {if (result[0].PointLng == result[result.length - 1].PointLng && result[0].PointLat == result[result.length - 1].PointLat) {labText = "并";winfowText = "[起点|终点]:" + result[0].PointLable;}else {if (result[i].PointType == "0") {labText = "起";winfowText = "[起点]:" + result[i].PointLable;}else {labText = "终";winfowText = "[终点]:" + result[i].PointLable;}}}(function (x) {  var infoWindow = new BMap.InfoWindow(winfowText, { enableMessage: false, width: 30, height: 20 });m1.addEventListener("click", function () {this.openInfoWindow(infoWindow);});})(i);maps.addOverlay(m1);var lab1 = new BMap.Label(labText, { position: firstPoint, offset: new BMap.Size(-10, -25) });lab1.setStyle({color: "#fff",fontSize: "16px",backgroundColor: "0.05",border: "0",fontWeight: "bold"});maps.addOverlay(lab1);}

转载于:https://www.cnblogs.com/milkytea/p/6723494.html

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