我已经彻底搜索了MapBox支持和Stack Overflow,以获得有关如何使用最新MapBox API(1.6.1截至目前)创建独占层切换器的答案。在这种情况下,独占意味着一次只能看到/激活一层。出于设计原因,我不想使用Leaflet Layers Control。
在一点帮助下,我想出了这个几乎可行的例子:
http://bl.ocks.org/sarahkhank/0e5d81998d2d0876856c
出于某种原因,添加和删除gridControl会中断循环。如果你使用这个结构来添加/删除没有gridLayer或gridControl的tileLayer,它可以正常工作。但是当你添加网格元素时,数组中的最后一个元素不会显示出来并且会影响循环的其余部分。 (在这种情况下'远'。)
有谁知道为什么会这样?这种类型的层切换器经常被问及MapBox的支持,所以我相信很多人都会很高兴看到这种情况变得生动。谢谢你的帮助!!
在我的bl.ocks链接断开的情况下,在底部发布完整代码。
<html>
<head>
<title>DC Zoning Map</title>
<script src="http://code.jquery.com/jquery-1.10.2.min.js"></script>
<script src='http://api.tiles.mapbox.com/mapbox.js/v1.6.1/mapbox.js'></script>
<link href='http://api.tiles.mapbox.com/mapbox.js/v1.6.1/mapbox.css' rel='stylesheet' />
</head>
<body>
<style>
#zoning-map-container {
position:relative;
float: right;
display: inline;
}
#map_zoning {
position: relative;
float: left;
clear: both;
width:45%;
min-width: 500px;
height: 500px;
right:20px;
margin-top: 10px;
margin-right: 10px;
border: 1px solid #bbb;
}
#map-ui-zoning {
position:relative;
float: left;
list-style:none;
margin:0;padding:0;
left: -20px;
}
#map-ui-zoning a {
font-family: 'Carrois Gothic', sans-serif;
font-size: 12px;
font-weight: 400;
background:#FFF;
color:#5698D0;
float: left;
margin:0;
border:1px solid #BBB;
border-width: 1px 1px 1px 0;
max-width:100px;
padding:8px;
text-decoration:none;
}
#map-ui-zoning li {
display: inline;
}
#map-ui-zoning a:hover { background:#ECF5FA; }
#map-ui-zoning li:last-child a {
border-bottom-width:1px;
-webkit-border-radius:0 3px 3px 0;
border-radius:0 3px 3px 0;
}
#map-ui-zoning li:first-child a {
border-left-width: 1px;
-webkit-border-radius:3px 0 0 3px;
border-radius:3px 0 0 3px;
}
#map-ui-zoning a.active {
background:#5698D0;
border-color:#5698D0;
border-top-color:#BBB;
color:#FFF;
}
.map-tooltip .zone {
font-size: 10px;
line-height: 13px;
font-weight: bold;
}
.map-tooltip .desc {
font-size: 10px;
line-height: 13px;
padding-bottom: 3px;
}
.map-tooltip .focus {
font-size: 13px;
line-height: 16px;
font-weight: bold;
}
.map-tooltip .info {
font-size: 11px;
line-height: 16px;
}
</style>
<div id='zoning-map-container'>
<ul id='map-ui-zoning'>
<li><a href="#" data-name="stories" class="active">Maximum Stories</a></li>
<li><a href="#" data-name="height">Maximum Height</a></li>
<li><a href="#" data-name="far">Maximum FAR</a></li>
</ul>
<div id='map_zoning'></div>
</div>
<script type='text/javascript'>
var map = L.mapbox.map('map_zoning');
var stamenLayer = L.tileLayer('https://stamen-tiles-{s}.a.ssl.fastly.net/toner-lite/{z}/{x}/{y}.png', {
attribution: 'Map tiles by <a href="http://stamen.com">Stamen Design</a>, under <a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a>. Data by <a href="http://openstreetmap.org">OpenStreetMap</a>, under <a href="http://creativecommons.org/licenses/by-sa/3.0">CC BY SA</a>.'
}).addTo(map);
map.setView([38.908, -77.029], 11);
var ui = document.getElementById('map-ui-zoning');
var stories = L.mapbox.tileLayer('sarah.28n6ogvi');
var storiesGrid = L.mapbox.gridLayer('sarah.28n6ogvi');
var storiesGridControl = L.mapbox.gridControl(storiesGrid, {follow: false});
var height = L.mapbox.tileLayer('sarah.ofjsv2t9');
var heightGrid = L.mapbox.gridLayer('sarah.ofjsv2t9');
var heightGridControl = L.mapbox.gridControl(heightGrid, {follow: false});
var far = L.mapbox.tileLayer('sarah.2w9x80k9');
var farGrid = L.mapbox.gridLayer('sarah.2w9x80k9');
var farGridControl = L.mapbox.gridControl(farGrid, {follow: false});
var layers = [{
'name': 'stories',
'layer': stories,
'gridLayer': storiesGrid,
'gridControl': storiesGridControl
},
{
'name': 'height',
'layer': height,
'gridLayer': heightGrid,
'gridControl': heightGridControl
},
{
'name': 'far',
'layer': far,
'gridLayer': farGrid,
'gridControl': farGridControl
}
];
$(document).ready(function(layer){
map.addLayer(stories);
map.addLayer(storiesGrid);
map.addControl(storiesGridControl);
});
$('#map-ui-zoning li a').on('click', function() {
$('#map-ui-zoning li a').removeClass('active');
var $el = $(this);
layers.forEach(function(layer) {
if ($el.data('name') !== layer['name']){
map.removeLayer(layer['layer']);
map.removeLayer(layer['gridLayer']);
map.removeControl(layer['gridControl']);
}
else {
map.addLayer(layer['layer']);
map.addLayer(layer['gridLayer']);
map.addControl(layer['gridControl']);
$el.addClass('active');
}
});
});
</script>
答案 0 :(得分:0)
我认为当你调用map.removeControl(layer ['gridControl'])或更常见的map.removeLayer时你不测试图层是否已经添加到地图中,否则mapboxjs会尝试删除一个元素不存在,这是你的代码被破坏的地方。
if ($el.data('name') !== layer['name'])
需要成为
if ($el.data('name') !== layer['name'] && map.hasLayer(layer))
当然你需要相应地改变你的其他声明。