我正在尝试在 Google 地图上实现一些寻求的自定义方向服务。我有一堆预制路径，我根据两个下拉框中的选择隐藏和显示。到目前为止效果很好。但是，我想在路径的开始和结束处添加标记，我该怎么做呢？
这是一个工作示例http://jsfiddle.net/PwFDM/
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html {
height: 100%
}
body {
height: 100%;
margin: 0;
padding: 0
}
#map_canvas {
height: 100%
}
</style>
<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?key=AIzaSyD9W-wEHa5KzvcntFzGgyTwWtx4wvrs0os&sensor=true">
</script>
</head>
<body>
<div><strong>Start: </strong>
<select id="start">
<option>Building 1</option>
<option>Building 2</option>
<option>Building 3</option>
<option>Building 4</option>
<option>Building 5</option>
<option>Building 6</option>
<option>Building 7</option>
<option>Building 8</option>
</select> <strong>End:</strong>
<select id="end">
<option>Building 1</option>
<option>Building 2</option>
<option>Building 3</option>
<option>Building 4</option>
<option>Building 5</option>
<option>Building 6</option>
<option>Building 7</option>
<option>Building 8</option>
</select>
<input type="button" onclick="drawDirections();" value="GO" />
</div>
<div id="map" style="width: 100%; height: 100%"></div>
<script type="text/javascript">
var mapOptions = {
mapTypeId: google.maps.MapTypeId.ROADMAP,
center: new google.maps.LatLng(51.507684, 0.063686),
zoom: 17
};
var map = new google.maps.Map(document.getElementById("map"), mapOptions);
// Predefine all the paths
var paths = [];
paths['1_to_2'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.508445, 0.063944),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507457, 0.064019)],
strokeColor: '#FF0000'
});
paths['1_to_3'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.508445, 0.063944),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507494, 0.063399)],
strokeColor: '#FF0000'
});
paths['1_to_4'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.508445, 0.063944),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507709, 0.063301)],
strokeColor: '#FF0000'
});
paths['1_to_5'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.508445, 0.063944),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.50747, 0.062659),
new google.maps.LatLng(51.507501, 0.062467)],
strokeColor: '#FF0000'
});
paths['1_to_6'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.508445, 0.063944),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.507275, 0.062455)],
strokeColor: '#FF0000'
});
paths['1_to_7'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.508445, 0.063944),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.507275, 0.062455)],
strokeColor: '#FF0000'
});
paths['1_to_8'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.508445, 0.063944),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507248, 0.065797),
new google.maps.LatLng(51.507449, 0.065805),
new google.maps.LatLng(51.507442, 0.066004)],
strokeColor: '#FF0000'
});
//---------------------------------------------------------
paths['2_to_3'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507457, 0.064019),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507494, 0.063399)],
strokeColor: '#FF0000'
});
paths['2_to_4'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507457, 0.064019),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507709, 0.063301)],
strokeColor: '#FF0000'
});
paths['2_to_5'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507457, 0.064019),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.50747, 0.062659),
new google.maps.LatLng(51.507501, 0.062467)],
strokeColor: '#FF0000'
});
paths['2_to_6'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507457, 0.064019),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.507275, 0.062455)],
strokeColor: '#FF0000'
});
paths['2_to_7'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507457, 0.064019),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.507275, 0.062455)],
strokeColor: '#FF0000'
});
paths['2_to_8'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507457, 0.064019),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507248, 0.065797),
new google.maps.LatLng(51.507449, 0.065805),
new google.maps.LatLng(51.507442, 0.066004)],
strokeColor: '#FF0000'
});
//---------------------------------------------------------
paths['3_to_4'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507494, 0.063399),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507709, 0.063301)],
strokeColor: '#FF0000'
});
paths['3_to_5'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507494, 0.063399),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.50747, 0.062659),
new google.maps.LatLng(51.507501, 0.062467)],
strokeColor: '#FF0000'
});
paths['3_to_6'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507494, 0.063399),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.507275, 0.062455)],
strokeColor: '#FF0000'
});
paths['3_to_7'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507494, 0.063399),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.507275, 0.062455)],
strokeColor: '#FF0000'
});
paths['3_to_8'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507494, 0.063399),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507248, 0.065797),
new google.maps.LatLng(51.507449, 0.065805),
new google.maps.LatLng(51.507442, 0.066004)],
strokeColor: '#FF0000'
});
//-------------------------------------------------------------
paths['4_to_5'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507709, 0.063301),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.50747, 0.062659),
new google.maps.LatLng(51.507501, 0.062467)],
strokeColor: '#FF0000'
});
paths['4_to_6'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507709, 0.063301),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.507275, 0.062455)],
strokeColor: '#FF0000'
});
paths['4_to_7'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507709, 0.063301),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.507275, 0.062455)],
strokeColor: '#FF0000'
});
paths['4_to_8'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507709, 0.063301),
new google.maps.LatLng(51.507474, 0.063877),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507248, 0.065797),
new google.maps.LatLng(51.507449, 0.065805),
new google.maps.LatLng(51.507442, 0.066004)],
strokeColor: '#FF0000'
});
//---------------------------------------------------------------
paths['5_to_6'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507501, 0.062467),
new google.maps.LatLng(51.50747, 0.062659),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.507275, 0.062455)],
strokeColor: '#FF0000'
});
paths['5_to_7'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507501, 0.062467),
new google.maps.LatLng(51.50747, 0.062659),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.507275, 0.062455)],
strokeColor: '#FF0000'
});
paths['5_to_8'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507501, 0.062467),
new google.maps.LatLng(51.50747, 0.062659),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507248, 0.065797),
new google.maps.LatLng(51.507449, 0.065805),
new google.maps.LatLng(51.507442, 0.066004)],
strokeColor: '#FF0000'
});
//----------------------------------------------------
paths['6_to_7'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507275, 0.062455),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.507275, 0.062455)],
strokeColor: '#FF0000'
});
paths['6_to_8'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507275, 0.062455),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507248, 0.065797),
new google.maps.LatLng(51.507449, 0.065805),
new google.maps.LatLng(51.507442, 0.066004)],
strokeColor: '#FF0000'
});
//--------------------------------------------------------
paths['7_to_8'] = new google.maps.Polyline({
path: [
new google.maps.LatLng(51.507275, 0.062455),
new google.maps.LatLng(51.507293, 0.062681),
new google.maps.LatLng(51.507287, 0.063839),
new google.maps.LatLng(51.507248, 0.065797),
new google.maps.LatLng(51.507449, 0.065805),
new google.maps.LatLng(51.507442, 0.066004)],
strokeColor: '#FF0000'
});
function drawDirections() {
var start = 1 + document.getElementById('start').selectedIndex;
var end = 1 + document.getElementById('end').selectedIndex;
var i;
if (start === end) {
alert('Please choose different buildings');
} else {
// Hide all polylines
for (i in paths) {
paths[i].setOptions({
map: null
});
}
// Show the route
if (typeof paths['' + start + '_to_' + end] !== 'undefined') {
paths['' + start + '_to_' + end].setOptions({
map: map
});
} else if (typeof paths['' + end + '_to_' + start] !== 'undefined') {
paths['' + end + '_to_' + start].setOptions({
map: map
});
}
var laLatLng = new google.maps.LatLng(51.507684, 0.063686);
map.panTo(laLatLng);
map.setZoom(17);
//panTo(latLng:LatLng)
}
}
</script>
</body>
</html>