总结一下最近研究百度地图的一些成果，针对物流路线的自定义复杂覆盖物的写法。
获取密钥、初始化百度地图这些基本的在这里就不讲了，详细的参考百度地图官方文档。
这里会详细介绍：
- 自定义车辆图标并在当前位置上标注；
- 点击车辆图标绘制车辆的规划路线（已走过的和未走过的用不同颜色标注）和各个状态点的状态信息；
- 定义自定义覆盖物；
- 点击状态点切换显示、隐藏提示信息；
- 自动调整最佳视野
先上效果图
-
初始化显示车辆当前位置
1.jpg
-
点击车辆图标绘制车辆的规划路线（已走过的和未走过的用不同颜色标注）和各个状态点的状态信息，并自动调整视野
2.jpg
- 点击状态点切换显示、隐藏提示信息（自定义覆盖物）
3.jpg
下面是代码和分析
首先模拟两辆车的数据（两辆车的处理方式和多辆车的方式基本一致）
var car1 = [
["113.208619", "23.170208","广州","装车","2016-12-05 19:47:03"],
["112.622218","26.979794","","装车","2016-12-05 19:47:03"],
["113.006332","28.263503","长沙","当前位置","2016-12-05 19:47:03"],
["111.731111","40.842",,"呼和浩特","暂未到达目的地"]
];
var car2 = [
["120.230199","30.215376","","装车","2016-12-05 19:47:03"],
["108.945456","34.366566","西安","当前位置","2016-12-05 19:47:03"],
["87.504831","43.937895",,"乌鲁木齐","暂未到达目的地"]
];
1.自定义车辆图标并在当前位置上标注；
ps：默认倒数第二个位置为当前位置，楼主偷懒将当前位置的坐标直接拿来用了，项目中看实际情况灵活运用
初始化百度地图详见百度地图api
currentLocation(["113.006332","28.263503"]);
currentLocation(["108.945456","34.366566"]);
function currentLocation(curPosArr){
var curPt = new BMap.Point(curPosArr[0],curPosArr[1]);
var curIcon = new BMap.Icon("img/working.png",new BMap.Size(28,20));
var curMarker = new BMap.Marker(curPt,{icon:curIcon});
mp.addOverlay(curMarker);
};
2.点击车辆图标绘制车辆的规划路线（已走过的和未走过的用不同颜色标注）；
ps：这一步是最关键也是最复杂的一步；
currentLocation(["113.006332","28.263503"],car1);
currentLocation(["108.945456","34.366566"],car2);
function currentLocation(curPosArr,carArr){
var curPt = new BMap.Point(curPosArr[0],curPosArr[1]);
var curIcon = new BMap.Icon("img/working.png",new BMap.Size(28,20));
var curMarker = new BMap.Marker(curPt,{icon:curIcon});
mp.addOverlay(curMarker);
var isDraw = false; //状态：确定是否已经绘制过路线
curMarker.onclick = function(){ //给当前标注添加点击事件 ->绘制当前车辆的路线图
drawPath(carArr,isDraw); //绘制路径
isDraw = true; //切换状态为已经绘制过路径
}
};
function drawPath(carArr,isDraw){
if(isDraw){ //若绘制过路线 返回 false
return false;
};
var pointArr = [];
var ptNum = 0;
var driving = new BMap.DrivingRoute(mp); //创建驾车实例
for(var i = 0,len = carArr.length;i<len;i++){
var point = new BMap.Point(carArr[i][0],carArr[i][1]);
pointArr[i] = point;
};
var len = pointArr.length-1;
initRoute(ptNum);
function initRoute(num){
driving.search(pointArr[num],pointArr[num+1]);
driving.setSearchCompleteCallback(function(){
var plan = driving.getResults().getPlan(0);
var pts = plan.getRoute(0).getPath();
var lineCor = ptNum == (len-1) ? 'red':"#1aea0a";
var lineSty = ptNum == (len-1) ? 'dashed':"solid";
var polyline = new BMap.Polyline(pts,{strokeColor:lineCor, strokeWeight:3, strokeOpacity:0.8,strokeStyle:lineSty});
mp.addOverlay(polyline);
//查找下两个点
ptNum++;
if(ptNum < len){
initRoute(ptNum);
}
});
};
mp.setViewport(pointArr); //自动调整视野
};
3.显示各个状态点的状态
定义复杂的自定义覆盖物
function ComplexCustomOverlay(point,state,time) {
this._point = point;
this.state = state;
this.time = time;
};
ComplexCustomOverlay.prototype = new BMap.Overlay();
ComplexCustomOverlay.prototype.initialize = function(map) {
this._map = map;
var div = this._div = document.createElement("div");
$(div).addClass('state-wrap');
var str = '<div class="logistics-wrap">';
str += '<div class="logistics-state">'+this.state+'</div>';
str += '<div class="logistics-time">'+this.time+'</div>';
str += '</div>';
div.innerHTML = str;
mp.getPanes().labelPane.appendChild(div);
var he = div.offsetHeight;
this._he = he; //当前div的高度
return div;
};
ComplexCustomOverlay.prototype.draw = function() {
var map = this._map;
var pixel = map.pointToOverlayPixel(this._point);
this._div.style.left = pixel.x -24+"px";
this._div.style.top = pixel.y -this._he+5+ "px";
};
自定义复杂覆盖物结束，具体样式可以写在样式表中，然后调用（注：创建实例必须在自定义覆盖物后面调用）
var myComOverlay = new ComplexCustomOverlay(point,state,time); //创建自定义覆盖物实例
mp.addOverlay(myComOverlay);
4.自定义复杂覆盖物和各个点的位置图标加入
最后整体的代码和用到的图片如下（ps：注意目录结构，图片在img文件夹里）
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<style>
body,
html {
width: 100%;
height: 100%;
margin: 0;
font-family: "微软雅黑";
}
#mapcontainer {
width: 100%;
height: 100%;
position: relative;
}
.state-wrap{
padding-bottom: 16px;
position: absolute;
left: 0;
top: 0;
font-size: 12px;
line-height: 16px;
background:url(img/map_label.png) no-repeat left bottom;
}
.logistics-wrap{
background: #fff;
padding: 10px;
}
.logistics-state,.logistics-time{
padding-left: 25px;
height: 25px;
line-height: 25px;
width: 125px;
overflow: hidden;
text-overflow : ellipsis;
white-space: nowrap;
}
.logistics-state{
background:url(img/state_icon.png) no-repeat left center;
}
.logistics-time{
background:url(img/clock_icon.png) no-repeat left center;
}
</style>
</head>
<body>
<div id="mapcontainer"></div>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=你的密钥"></script>
<script src="//cdn.bootcss.com/jquery/1.11.0/jquery.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){
var car1 = [
["113.208619", "23.170208","广州","装车","2016-12-05 19:47:03"],
["112.622218","26.979794","","装车","2016-12-05 19:47:03"],
["113.006332","28.263503","长沙","当前位置","2016-12-05 19:47:03"],
["111.731111","40.842",,"呼和浩特","暂未到达目的地"]
];
var car2 = [
["120.230199","30.215376","","装车","2016-12-05 19:47:03"],
["108.945456","34.366566","西安","当前位置","2016-12-05 19:47:03"],
["87.504831","43.937895",,"乌鲁木齐","暂未到达目的地"]
];
var mp = new BMap.Map("mapcontainer", {enableMapClick:false});
mp.centerAndZoom(new BMap.Point(112.438233, 34.654336), 6);
mp.enableScrollWheelZoom();
currentLocation(["113.006332","28.263503"],car1);
currentLocation(["108.945456","34.366566"],car2);
//标注当前车辆坐标位置
function currentLocation(curPosArr,carArr){
var curPt = new BMap.Point(curPosArr[0],curPosArr[1]); //当前位置
var curIcon = new BMap.Icon("img/working.png",new BMap.Size(28,20));
var curMarker = new BMap.Marker(curPt,{icon:curIcon});
mp.addOverlay(curMarker);
var isDraw = false; //是否已经绘制过路线
curMarker.onclick = function(){
drawPath(carArr,isDraw);
isDraw = true;
}
};
//绘制路线
function drawPath(carArr,isDraw){
if(isDraw){ //若绘制过路线 返回 false
return false;
};
var pointArr = [];
var ptNum = 0;
var driving = new BMap.DrivingRoute(mp); //创建驾车实例
// 复杂的自定义覆盖物
function ComplexCustomOverlay(point,state,time) {
this._point = point;
this.state = state;
this.time = time;
};
ComplexCustomOverlay.prototype = new BMap.Overlay();
ComplexCustomOverlay.prototype.initialize = function(map) {
this._map = map;
var div = this._div = document.createElement("div");
$(div).addClass('state-wrap');
var str = '<div class="logistics-wrap">';
str += '<div class="logistics-state">'+this.state+'</div>';
str += '<div class="logistics-time">'+this.time+'</div>';
str += '</div>';
div.innerHTML = str;
mp.getPanes().labelPane.appendChild(div);
var he = div.offsetHeight;
this._he = he; //当前div的高度
return div;
};
ComplexCustomOverlay.prototype.draw = function() {
var map = this._map;
var pixel = map.pointToOverlayPixel(this._point);
this._div.style.left = pixel.x -24+"px";
this._div.style.top = pixel.y -this._he+5+ "px";
};
/*自定义复杂覆盖物结束*/
for(var i = 0,len = carArr.length;i<len;i++){
var point = new BMap.Point(carArr[i][0],carArr[i][1]);
pointArr[i] = point;
var myIcon = new BMap.Icon("img/location_icon.png",new BMap.Size(9,9));
var marker = new BMap.Marker(point,{icon:myIcon}); // 创建标注
mp.addOverlay(marker); // 将标注添加到地图中
//此处解决在for循环中添加事件总是执行最后一个的情况，传入参数并且立即执行
(function(point,state,time){
var myComOverlay = new ComplexCustomOverlay(point,state,time);
mp.addOverlay(myComOverlay);
marker.onclick = function(){ //给各个点添加点击事件，显示、隐藏自定义复杂物
if(myComOverlay.isVisible()){
myComOverlay.hide();
}else{
myComOverlay.show();
}
}
})(point,carArr[i][3], carArr[i][4]);
};
var len = pointArr.length-1;
initRoute(ptNum);
function initRoute(num){
driving.search(pointArr[num],pointArr[num+1]);
driving.setSearchCompleteCallback(function(){
var plan = driving.getResults().getPlan(0);
var pts = plan.getRoute(0).getPath();
var lineCor = ptNum == (len-1) ? 'red':"#1aea0a";
var lineSty = ptNum == (len-1) ? 'dashed':"solid";
var polyline = new BMap.Polyline(pts,{strokeColor:lineCor, strokeWeight:3, strokeOpacity:0.8,strokeStyle:lineSty});
mp.addOverlay(polyline);
//查找下两个点
ptNum++;
if(ptNum < len){
initRoute(ptNum);
}
});
};
mp.setViewport(pointArr); //自动调整视野
};
})
</script>
</body>
</html>
用到的图标
clock_icon.png
location_icon.png
map_label.png
state_icon.png
working.png
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