调⽤百度地图API实现路线的轨迹回放功能其实很简单，只要搞懂以下⼏点即可： 1.需要⽤Polyline⽅法先绘制好路线图
3.关键⼀步，通过结合定时器，使⽤Marker创建的标注点实例的setPosition改变标注点位置，实现播放功能
代码分享，直接复制即可使⽤
[html]
1. <!DOCTYPE html>
2. <html>
3. <head>
4. <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
5. <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
6. <title>Track</title>
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7. <style type="text/css">
8. html{height:100%}
9. body{height:100%;margin:0px;padding:0px}
10. #controller{width:100%; border-bottom:3px outset; height:30px; filter:alpha(Opacity=100); -moz-opacity:1; opacity:1; z-
index:10000; background-color:lightblue;}
11. #container{height:100%}
12. </style>
13. <script type="text/javascript" src="api.map.baidu/api?v=1.5&ak=D2b4558ebed15e52558c6a766c35ee73"></script>
14. <script type="text/javascript">
15. //获取所有点的坐标
16. var points = [
17. new BMap.Point(114.00100, 22.550000), new BMap.Point(114.00130, 22.550000),
18. new BMap.Point(114.00160, 22.550000), new BMap.Point(114.00200, 22.550000),
19. new BMap.Point(114.00300, 22.550500), new BMap.Point(114.00400, 22.550000),
20. new BMap.Point(114.00500, 22.550000), new BMap.Point(114.00505, 22.549800),
21. new BMap.Point(114.00510, 22.550000), new BMap.Point(114.00515, 22.550000),
22. new BMap.Point(114.00525, 22.550400), new BMap.Point(114.00537, 22.549500)
23. ];
24.
25. var map; //百度地图对象
26. var car; //汽车图标
27. var label; //信息标签
28. var centerPoint;
30. var timer; //定时器
31. var index = 0; //记录播放到第⼏个point
32.
33. var followChk, playBtn, pauseBtn, resetBtn; //⼏个控制按钮台湾旅游签证暂停
34.
35. function init() {
36. followChk = ElementById("follow");
37. playBtn = ElementById("play");
38. pauseBtn = ElementById("pause");
39. resetBtn = ElementById("reset");
40.西部影视城旅游景点介绍
41. //初始化地图，选取第⼀个点为起始点
42. map = new BMap.Map("container");
43. AndZoom(points[0], 15);
44. ableScrollWheelZoom();
45. map.addControl(new BMap.NavigationControl());
46. map.addControl(new BMap.ScaleControl());
47. map.addControl(new BMap.OverviewMapControl({isOpen: true}));
48.
49. //通过DrivingRoute获取⼀条路线的point
50. var driving = new BMap.DrivingRoute(map);
51. driving.search(new BMap.Point(114.00100, 22.550000), new BMap.Point(113.95100, 22.550000));
52. driving.setSearchCompleteCallback(function() {
53. //得到路线上的所有point
54. points = Results().getPlan(0).getRoute(0).getPath();
55. //画⾯移动到起点和终点的中间
56. centerPoint = new BMap.Point((points[0].lng + points[points.length - 1].lng) / 2, (points[0].lat + points[points.length - 1].lat) / 2);
57. map.panTo(centerPoint);
58. //连接所有点
59. map.addOverlay(new BMap.Polyline(points, {strokeColor: "black", strokeWeight: 5, strokeOpacity: 1}));
60.
61. //显⽰⼩车⼦
62. label = new BMap.Label("", {offset: new BMap.Size(-20, -20)});
63. car = new BMap.Marker(points[0]);
64. car.setLabel(label);
65. map.addOverlay(car);
66.
67. //点亮操作按钮
68. playBtn.disabled = false;
69. resetBtn.disabled = false;
70. });
71. }
72.
73. function play() {
74. playBtn.disabled = true;
75. pauseBtn.disabled = false;
76.
77. var point = points[index];
78. if(index > 0) {
79. map.addOverlay(new BMap.Polyline([points[index - 1], point], {strokeColor: "red", strokeWeight: 1, strokeOpacity: 1}));
80. }
81. label.setContent("经度: " + point.lng + "<br>纬度: " + point.lat);
82. car.setPosition(point);
83. index++;
84. if(followChk.checked) {
85. map.panTo(point);
86. }
87. if(index < points.length) {
88. timer = window.setTimeout("play(" + index + ")", 200);
89. } else {
90. playBtn.disabled = true;
91. pauseBtn.disabled = true;
92. map.panTo(point);
93. }
94. }
95.
96. function pause() {
97. playBtn.disabled = false;
98. pauseBtn.disabled = true;
99.
100. if(timer) {
101. window.clearTimeout(timer);
102. }
103. }
104.
105. function reset() {
106. followChk.checked = false;
107. playBtn.disabled = false;
108. pauseBtn.disabled = true;
109.
110. if(timer) {
111. window.clearTimeout(timer);
112. }
113. index = 0;
114. car.setPosition(points[0]);
115. map.panTo(centerPoint);
116. }
117. </script>肇庆旅游
118. </head>
119.
120. <body onload="init();">
121. <div id="controller" align="center">
122. <input id="follow" type="checkbox"><span >画⾯跟随</span></input> 123. <input id="play" type="button" value="播放" onclick="play();" disabled />
124. <input id="pause" type="button" value="暂停" onclick="pause();" disabled />
125. <input id="reset" type="button" value="重置" onclick="reset()" disabled />
126. </div>
127. <div id="container"></div>
128. </body>
129. </html>
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