Mapbox GL - 突出显示功能和 queryRenderedFeatures()，同时允许底图样式更改
Mapbox GL - highlight features and queryRenderedFeatures() while allowing basemap style change
我需要能够使用 Mapbox GL 在边界框中突出显示特征，如 this example 所示。我的地图还需要能够更改样式层，例如将基本样式从 mapbox://styles/mapbox/light-v10 更改为 mapbox://styles/mapbox/satellite-v9。这一直具有挑战性，因为 Mapbox GL 本身不支持“底图”的概念，例如传单确实如此。
我的解决方案，经过大量搜索（我相信我最终遵循了 github 问题中发布的解决方法）涉及：
使用 map.on('style.load') 而不是示例中所示的 map.on('load') （我相信 map.on('style.load') 不属于他们的 public API，但我可能是错的）和，
迭代 sources/layers 数组（请参阅下面代码中的 vectorTileLayers 变量），以便在每次加载新样式时向地图添加矢量切片图层。
这在某些方面对我来说非常有效 - 我可以将任意数量的矢量切片源添加到数组中，并且如果基本样式发生更改，它们将全部添加回地图。但是，如果将 sources/layers 添加到数组中的地图并如下所示进行迭代，我将无法按照 Mapbox 提供的示例添加查询功能。边界功能有效，但是当它被绘制和释放时，我看到 运行 宁下面的代码片段显示的错误。
这是我的实际问题的简化版本，将允许其他人 运行 和操纵代码。实际上，我正在添加我自己的矢量切片图层（存储在 vectorTileLayers 数组中，这没有问题。当我尝试添加另一个具有相同源和不同样式的图层时，如示例所示，我我无法真正查询所需的图层。任何帮助将不胜感激。仅供参考 - 可切换图层按钮未显示在此代码段中，但这对解决问题并不重要。
mapboxgl.accessToken = 'pk.eyJ1IjoiamFtZXljc21pdGgiLCJhIjoiY2p4NTRzdTczMDA1dzRhbXBzdmFpZXV6eCJ9.-k7Um-xmYy4xhNDN6kDvpg';
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/light-v10',
center: [-98, 38.88],
minZoom: 2,
zoom: 3
});
var vectorTileLayers = [{
source: {
type: 'vector',
url: 'mapbox://mapbox.82pkq93d'
},
layer: {
id: 'counties',
type: 'fill',
source: 'counties',
'source-layer': 'original',
paint: {
'fill-outline-color': 'rgba(0,0,0,0.1)',
'fill-color': 'rgba(0,0,0,0.1)'
},
}
},
{
source: {
type: 'vector',
url: 'mapbox://mapbox.82pkq93d'
},
layer: {
id: 'counties-highlighted',
type: 'fill',
source: 'counties',
'source-layer': 'original',
paint: {
'fill-outline-color': '#484896',
'fill-color': '#6e599f',
'fill-opacity': 0.75
},
filter: ['in', 'FIPS', '']
}
}
]
map.on('style.load', function() {
for (var i = 0; i < vectorTileLayers.length; i++) {
var tileLayer = vectorTileLayers[i];
map.addSource(tileLayer.layer.source, tileLayer.source);
map.addLayer(tileLayer.layer);
}
var layerList = document.getElementById('basemapmenu');
var inputs = layerList.getElementsByTagName('input');
function switchLayer(layer) {
var layerId = layer.target.id;
map.setStyle('mapbox://styles/mapbox/' + layerId);
}
for (var i = 0; i < inputs.length; i++) {
inputs[i].onclick = switchLayer;
}
});
// Disable default box zooming.
map.boxZoom.disable();
// Create a popup, but don't add it to the map yet.
var popup = new mapboxgl.Popup({
closeButton: false
});
var canvas = map.getCanvasContainer();
var start;
var current;
var box;
canvas.addEventListener('mousedown', mouseDown, true);
// Return the xy coordinates of the mouse position
function mousePos(e) {
var rect = canvas.getBoundingClientRect();
return new mapboxgl.Point(
e.clientX - rect.left - canvas.clientLeft,
e.clientY - rect.top - canvas.clientTop
);
}
function mouseDown(e) {
// Continue the rest of the function if the shiftkey is pressed.
if (!(e.shiftKey && e.button === 0)) return;
// Disable default drag zooming when the shift key is held down.
map.dragPan.disable();
// Call functions for the following events
document.addEventListener('mousemove', onMouseMove);
document.addEventListener('mouseup', onMouseUp);
document.addEventListener('keydown', onKeyDown);
// Capture the first xy coordinates
start = mousePos(e);
}
function onMouseMove(e) {
// Capture the ongoing xy coordinates
current = mousePos(e);
// Append the box element if it doesnt exist
if (!box) {
box = document.createElement('div');
box.classList.add('boxdraw');
canvas.appendChild(box);
}
var minX = Math.min(start.x, current.x),
maxX = Math.max(start.x, current.x),
minY = Math.min(start.y, current.y),
maxY = Math.max(start.y, current.y);
// Adjust width and xy position of the box element ongoing
var pos = 'translate(' + minX + 'px,' + minY + 'px)';
box.style.transform = pos;
box.style.WebkitTransform = pos;
box.style.width = maxX - minX + 'px';
box.style.height = maxY - minY + 'px';
}
function onMouseUp(e) {
// Capture xy coordinates
finish([start, mousePos(e)]);
}
function onKeyDown(e) {
// If the ESC key is pressed
if (e.keyCode === 27) finish();
}
function finish(bbox) {
// Remove these events now that finish has been called.
document.removeEventListener('mousemove', onMouseMove);
document.removeEventListener('keydown', onKeyDown);
document.removeEventListener('mouseup', onMouseUp);
if (box) {
box.parentNode.removeChild(box);
box = null;
}
// If bbox exists. use this value as the argument for `queryRenderedFeatures`
if (bbox) {
var features = map.queryRenderedFeatures(bbox, {
layers: ['counties']
});
if (features.length >= 1000) {
return window.alert('Select a smaller number of features');
}
// Run through the selected features and set a filter
// to match features with unique FIPS codes to activate
// the `counties-highlighted` layer.
var filter = features.reduce(
function(memo, feature) {
memo.push(feature.properties.FIPS);
return memo;
},
['in', 'FIPS']
);
map.setFilter('counties-highlighted', filter);
}
map.dragPan.enable();
}
map.on('mousemove', function(e) {
var features = map.queryRenderedFeatures(e.point, {
layers: ['counties-highlighted']
});
// Change the cursor style as a UI indicator.
map.getCanvas().style.cursor = features.length ? 'pointer' : '';
if (!features.length) {
popup.remove();
return;
}
var feature = features[0];
popup
.setLngLat(e.lngLat)
.setText(feature.properties.COUNTY)
.addTo(map);
});
body {
margin: 0;
padding: 0;
}
#map {
position: absolute;
top: 0;
bottom: 0;
width: 100%;
}
#basemapmenu {
position: absolute;
display: inline-block;
background-color: transparent;
bottom: 0;
left: 0;
margin-left: 10px;
margin-bottom: 40px;
}
.boxdraw {
background: rgba(56, 135, 190, 0.1);
border: 2px solid #3887be;
position: absolute;
top: 0;
left: 0;
width: 0;
height: 0;
}
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet"/>
<link href="https://api.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.css" rel="stylesheet"/>
<script src="https://api.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.js"></script>
<div id="map"></div>
<div id='basemapmenu'>
<input id='light-v10' class='btn btn-outline-primary' type='button' name='rtoggle' value='Light' checked='checked'>
<input id='dark-v10' class='btn btn-outline-primary' type='button' name='rtoggle' value='Dark'>
<input id='satellite-v9' class='btn btn-outline-primary' type='button' name='rtoggle' value='Satellite'>
</div>
我运行你在本地编码发现问题了！
您正在尝试添加相同的源两次，并且 mapbox 给您错误，如果您检查您的控制台：
问题：地图上只能有一个源，一个ID
Error: There is already a source with this ID
第一次循环执行成功后。在第二次迭代中，它未能两次添加相同的源代码，代码在此处中断并且不再继续。因此不添加第二层（因此此后没有功能！）
修复：（添加了一个小检查以在已添加的情况下不添加相同的来源）
map.on('style.load', function () {
for (var i = 0; i < vectorTileLayers.length; i++) {
var tileLayer = vectorTileLayers[i];
if (!map.getSource(tileLayer.layer.source,)) //FIX
map.addSource(tileLayer.layer.source, tileLayer.source);
map.addLayer(tileLayer.layer);
}
var layerList = document.getElementById('basemapmenu');
var inputs = layerList.getElementsByTagName('input');
function switchLayer(layer) {
var layerId = layer.target.id;
map.setStyle('mapbox://styles/mapbox/' + layerId);
}
for (var i = 0; i < inputs.length; i++) {
inputs[i].onclick = switchLayer;
}
});
我可以看到代码运行良好：
希望这能解决问题。
我将接受多莉的上述回答，因为它准确地回答了我原来的问题。不幸的是，它并没有完全解决我的实际问题。经过一些额外的摆弄之后，我想 post 一个功能齐全的版本以供参考，以防人们遇到这个寻找在 Mapbox GL 中添加可切换“底图”图层的解决方案，有或没有像这样的用户交互选项。
在底图图层之间切换后，上述解决方案不起作用。矢量切片图层未正确重新加载。下面的解决方案似乎可以解决问题。它使用 map.on('styledata' ...) 而不是 map.on('style.load' ...)，这似乎允许通过更传统的方法加载层，首先调用 map.addSource()，然后调用 map.addLayer()。您可以加载单个源，然后加载任意数量的指向该源的层。所以在我的“真实世界”示例中，我加载了 3 个源，并从这些源加载了 5 个层。
（仅供参考 - 由于某种原因，stack overflow 中的 built-in 代码片段工具未呈现底图按钮。如果您将代码准确复制到 JS fiddle 或 codepen 中，它将起作用）
我希望这对未来的人有所帮助 - 似乎很多人在管理顶部带有自定义图层的 Mapbox 样式时遇到了问题。我当然有。
mapboxgl.accessToken =
"pk.eyJ1IjoiamFtZXljc21pdGgiLCJhIjoiY2p4NTRzdTczMDA1dzRhbXBzdmFpZXV6eCJ9.-k7Um-xmYy4xhNDN6kDvpg";
var map = new mapboxgl.Map({
container: "map",
style: "mapbox://styles/mapbox/light-v10",
center: [-98, 38.88],
minZoom: 2,
zoom: 3
});
map.on("styledata", function() {
map.addSource("counties", {
type: "vector",
url: "mapbox://mapbox.82pkq93d"
});
map.addLayer({
id: "counties",
type: "fill",
source: "counties",
"source-layer": "original",
paint: {
"fill-outline-color": "rgba(0,0,0,0.1)",
"fill-color": "rgba(0,0,0,0.1)"
}
});
map.addLayer({
id: "counties-highlighted",
type: "fill",
source: "counties",
"source-layer": "original",
paint: {
"fill-outline-color": "#484896",
"fill-color": "#6e599f",
"fill-opacity": 0.75
},
filter: ["in", "FIPS", ""]
});
var layerList = document.getElementById("basemapmenu");
var inputs = layerList.getElementsByTagName("input");
function switchLayer(layer) {
var layerId = layer.target.id;
map.setStyle("mapbox://styles/mapbox/" + layerId);
}
for (var i = 0; i < inputs.length; i++) {
inputs[i].onclick = switchLayer;
}
});
// Disable default box zooming.
map.boxZoom.disable();
// Create a popup, but don't add it to the map yet.
var popup = new mapboxgl.Popup({
closeButton: false
});
var canvas = map.getCanvasContainer();
var start;
var current;
var box;
canvas.addEventListener("mousedown", mouseDown, true);
// Return the xy coordinates of the mouse position
function mousePos(e) {
var rect = canvas.getBoundingClientRect();
return new mapboxgl.Point(
e.clientX - rect.left - canvas.clientLeft,
e.clientY - rect.top - canvas.clientTop
);
}
function mouseDown(e) {
// Continue the rest of the function if the shiftkey is pressed.
if (!(e.shiftKey && e.button === 0)) return;
// Disable default drag zooming when the shift key is held down.
map.dragPan.disable();
// Call functions for the following events
document.addEventListener("mousemove", onMouseMove);
document.addEventListener("mouseup", onMouseUp);
document.addEventListener("keydown", onKeyDown);
// Capture the first xy coordinates
start = mousePos(e);
}
function onMouseMove(e) {
// Capture the ongoing xy coordinates
current = mousePos(e);
// Append the box element if it doesnt exist
if (!box) {
box = document.createElement("div");
box.classList.add("boxdraw");
canvas.appendChild(box);
}
var minX = Math.min(start.x, current.x),
maxX = Math.max(start.x, current.x),
minY = Math.min(start.y, current.y),
maxY = Math.max(start.y, current.y);
// Adjust width and xy position of the box element ongoing
var pos = "translate(" + minX + "px," + minY + "px)";
box.style.transform = pos;
box.style.WebkitTransform = pos;
box.style.width = maxX - minX + "px";
box.style.height = maxY - minY + "px";
}
function onMouseUp(e) {
// Capture xy coordinates
finish([start, mousePos(e)]);
}
function onKeyDown(e) {
// If the ESC key is pressed
if (e.keyCode === 27) finish();
}
function finish(bbox) {
// Remove these events now that finish has been called.
document.removeEventListener("mousemove", onMouseMove);
document.removeEventListener("keydown", onKeyDown);
document.removeEventListener("mouseup", onMouseUp);
if (box) {
box.parentNode.removeChild(box);
box = null;
}
// If bbox exists. use this value as the argument for `queryRenderedFeatures`
if (bbox) {
var features = map.queryRenderedFeatures(bbox, {
layers: ["counties"]
});
if (features.length >= 1000) {
return window.alert("Select a smaller number of features");
}
// Run through the selected features and set a filter
// to match features with unique FIPS codes to activate
// the `counties-highlighted` layer.
var filter = features.reduce(
function(memo, feature) {
memo.push(feature.properties.FIPS);
return memo;
}, ["in", "FIPS"]
);
map.setFilter("counties-highlighted", filter);
}
map.dragPan.enable();
}
map.on("mousemove", function(e) {
var features = map.queryRenderedFeatures(e.point, {
layers: ["counties-highlighted"]
});
// Change the cursor style as a UI indicator.
map.getCanvas().style.cursor = features.length ? "pointer" : "";
if (!features.length) {
popup.remove();
return;
}
var feature = features[0];
popup.setLngLat(e.lngLat).setText(feature.properties.COUNTY).addTo(map);
});
body {
margin: 0;
padding: 0;
}
#map {
position: absolute;
top: 0;
bottom: 0;
width: 100%;
}
#basemapmenu {
position: absolute;
display: inline-block;
background-color: transparent;
bottom: 0;
left: 0;
margin-left: 10px;
margin-bottom: 40px;
}
.boxdraw {
background: rgba(56, 135, 190, 0.1);
border: 2px solid #3887be;
position: absolute;
top: 0;
left: 0;
width: 0;
height: 0;
}
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" />
<link href="https://api.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.css" rel="stylesheet" />
<script src="https://api.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.js"></script>
<div id="map"></div>
<div id='basemapmenu'>
<input id='light-v10' class='btn btn-outline-primary' type='button' name='rtoggle' value='Light' checked='checked'>
<input id='dark-v10' class='btn btn-outline-primary' type='button' name='rtoggle' value='Dark'>
<input id='satellite-v9' class='btn btn-outline-primary' type='button' name='rtoggle' value='Satellite'>
</div>
我需要能够使用 Mapbox GL 在边界框中突出显示特征，如 this example 所示。我的地图还需要能够更改样式层，例如将基本样式从 mapbox://styles/mapbox/light-v10 更改为 mapbox://styles/mapbox/satellite-v9。这一直具有挑战性，因为 Mapbox GL 本身不支持“底图”的概念，例如传单确实如此。
我的解决方案，经过大量搜索（我相信我最终遵循了 github 问题中发布的解决方法）涉及：
使用
map.on('style.load')而不是示例中所示的map.on('load')（我相信map.on('style.load')不属于他们的 public API，但我可能是错的）和，迭代 sources/layers 数组（请参阅下面代码中的
vectorTileLayers变量），以便在每次加载新样式时向地图添加矢量切片图层。
这在某些方面对我来说非常有效 - 我可以将任意数量的矢量切片源添加到数组中，并且如果基本样式发生更改，它们将全部添加回地图。但是，如果将 sources/layers 添加到数组中的地图并如下所示进行迭代，我将无法按照 Mapbox 提供的示例添加查询功能。边界功能有效，但是当它被绘制和释放时，我看到 运行 宁下面的代码片段显示的错误。
这是我的实际问题的简化版本，将允许其他人 运行 和操纵代码。实际上，我正在添加我自己的矢量切片图层（存储在 vectorTileLayers 数组中，这没有问题。当我尝试添加另一个具有相同源和不同样式的图层时，如示例所示，我我无法真正查询所需的图层。任何帮助将不胜感激。仅供参考 - 可切换图层按钮未显示在此代码段中，但这对解决问题并不重要。
mapboxgl.accessToken = 'pk.eyJ1IjoiamFtZXljc21pdGgiLCJhIjoiY2p4NTRzdTczMDA1dzRhbXBzdmFpZXV6eCJ9.-k7Um-xmYy4xhNDN6kDvpg';
var map = new mapboxgl.Map({
container: 'map',
style: 'mapbox://styles/mapbox/light-v10',
center: [-98, 38.88],
minZoom: 2,
zoom: 3
});
var vectorTileLayers = [{
source: {
type: 'vector',
url: 'mapbox://mapbox.82pkq93d'
},
layer: {
id: 'counties',
type: 'fill',
source: 'counties',
'source-layer': 'original',
paint: {
'fill-outline-color': 'rgba(0,0,0,0.1)',
'fill-color': 'rgba(0,0,0,0.1)'
},
}
},
{
source: {
type: 'vector',
url: 'mapbox://mapbox.82pkq93d'
},
layer: {
id: 'counties-highlighted',
type: 'fill',
source: 'counties',
'source-layer': 'original',
paint: {
'fill-outline-color': '#484896',
'fill-color': '#6e599f',
'fill-opacity': 0.75
},
filter: ['in', 'FIPS', '']
}
}
]
map.on('style.load', function() {
for (var i = 0; i < vectorTileLayers.length; i++) {
var tileLayer = vectorTileLayers[i];
map.addSource(tileLayer.layer.source, tileLayer.source);
map.addLayer(tileLayer.layer);
}
var layerList = document.getElementById('basemapmenu');
var inputs = layerList.getElementsByTagName('input');
function switchLayer(layer) {
var layerId = layer.target.id;
map.setStyle('mapbox://styles/mapbox/' + layerId);
}
for (var i = 0; i < inputs.length; i++) {
inputs[i].onclick = switchLayer;
}
});
// Disable default box zooming.
map.boxZoom.disable();
// Create a popup, but don't add it to the map yet.
var popup = new mapboxgl.Popup({
closeButton: false
});
var canvas = map.getCanvasContainer();
var start;
var current;
var box;
canvas.addEventListener('mousedown', mouseDown, true);
// Return the xy coordinates of the mouse position
function mousePos(e) {
var rect = canvas.getBoundingClientRect();
return new mapboxgl.Point(
e.clientX - rect.left - canvas.clientLeft,
e.clientY - rect.top - canvas.clientTop
);
}
function mouseDown(e) {
// Continue the rest of the function if the shiftkey is pressed.
if (!(e.shiftKey && e.button === 0)) return;
// Disable default drag zooming when the shift key is held down.
map.dragPan.disable();
// Call functions for the following events
document.addEventListener('mousemove', onMouseMove);
document.addEventListener('mouseup', onMouseUp);
document.addEventListener('keydown', onKeyDown);
// Capture the first xy coordinates
start = mousePos(e);
}
function onMouseMove(e) {
// Capture the ongoing xy coordinates
current = mousePos(e);
// Append the box element if it doesnt exist
if (!box) {
box = document.createElement('div');
box.classList.add('boxdraw');
canvas.appendChild(box);
}
var minX = Math.min(start.x, current.x),
maxX = Math.max(start.x, current.x),
minY = Math.min(start.y, current.y),
maxY = Math.max(start.y, current.y);
// Adjust width and xy position of the box element ongoing
var pos = 'translate(' + minX + 'px,' + minY + 'px)';
box.style.transform = pos;
box.style.WebkitTransform = pos;
box.style.width = maxX - minX + 'px';
box.style.height = maxY - minY + 'px';
}
function onMouseUp(e) {
// Capture xy coordinates
finish([start, mousePos(e)]);
}
function onKeyDown(e) {
// If the ESC key is pressed
if (e.keyCode === 27) finish();
}
function finish(bbox) {
// Remove these events now that finish has been called.
document.removeEventListener('mousemove', onMouseMove);
document.removeEventListener('keydown', onKeyDown);
document.removeEventListener('mouseup', onMouseUp);
if (box) {
box.parentNode.removeChild(box);
box = null;
}
// If bbox exists. use this value as the argument for `queryRenderedFeatures`
if (bbox) {
var features = map.queryRenderedFeatures(bbox, {
layers: ['counties']
});
if (features.length >= 1000) {
return window.alert('Select a smaller number of features');
}
// Run through the selected features and set a filter
// to match features with unique FIPS codes to activate
// the `counties-highlighted` layer.
var filter = features.reduce(
function(memo, feature) {
memo.push(feature.properties.FIPS);
return memo;
},
['in', 'FIPS']
);
map.setFilter('counties-highlighted', filter);
}
map.dragPan.enable();
}
map.on('mousemove', function(e) {
var features = map.queryRenderedFeatures(e.point, {
layers: ['counties-highlighted']
});
// Change the cursor style as a UI indicator.
map.getCanvas().style.cursor = features.length ? 'pointer' : '';
if (!features.length) {
popup.remove();
return;
}
var feature = features[0];
popup
.setLngLat(e.lngLat)
.setText(feature.properties.COUNTY)
.addTo(map);
});
body {
margin: 0;
padding: 0;
}
#map {
position: absolute;
top: 0;
bottom: 0;
width: 100%;
}
#basemapmenu {
position: absolute;
display: inline-block;
background-color: transparent;
bottom: 0;
left: 0;
margin-left: 10px;
margin-bottom: 40px;
}
.boxdraw {
background: rgba(56, 135, 190, 0.1);
border: 2px solid #3887be;
position: absolute;
top: 0;
left: 0;
width: 0;
height: 0;
}
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet"/>
<link href="https://api.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.css" rel="stylesheet"/>
<script src="https://api.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.js"></script>
<div id="map"></div>
<div id='basemapmenu'>
<input id='light-v10' class='btn btn-outline-primary' type='button' name='rtoggle' value='Light' checked='checked'>
<input id='dark-v10' class='btn btn-outline-primary' type='button' name='rtoggle' value='Dark'>
<input id='satellite-v9' class='btn btn-outline-primary' type='button' name='rtoggle' value='Satellite'>
</div>
我运行你在本地编码发现问题了！
您正在尝试添加相同的源两次，并且 mapbox 给您错误，如果您检查您的控制台：
问题：地图上只能有一个源，一个ID
Error: There is already a source with this ID
第一次循环执行成功后。在第二次迭代中，它未能两次添加相同的源代码，代码在此处中断并且不再继续。因此不添加第二层（因此此后没有功能！）
修复：（添加了一个小检查以在已添加的情况下不添加相同的来源）
map.on('style.load', function () {
for (var i = 0; i < vectorTileLayers.length; i++) {
var tileLayer = vectorTileLayers[i];
if (!map.getSource(tileLayer.layer.source,)) //FIX
map.addSource(tileLayer.layer.source, tileLayer.source);
map.addLayer(tileLayer.layer);
}
var layerList = document.getElementById('basemapmenu');
var inputs = layerList.getElementsByTagName('input');
function switchLayer(layer) {
var layerId = layer.target.id;
map.setStyle('mapbox://styles/mapbox/' + layerId);
}
for (var i = 0; i < inputs.length; i++) {
inputs[i].onclick = switchLayer;
}
});
我可以看到代码运行良好：
希望这能解决问题。
我将接受多莉的上述回答，因为它准确地回答了我原来的问题。不幸的是，它并没有完全解决我的实际问题。经过一些额外的摆弄之后，我想 post 一个功能齐全的版本以供参考，以防人们遇到这个寻找在 Mapbox GL 中添加可切换“底图”图层的解决方案，有或没有像这样的用户交互选项。
在底图图层之间切换后，上述解决方案不起作用。矢量切片图层未正确重新加载。下面的解决方案似乎可以解决问题。它使用 map.on('styledata' ...) 而不是 map.on('style.load' ...)，这似乎允许通过更传统的方法加载层，首先调用 map.addSource()，然后调用 map.addLayer()。您可以加载单个源，然后加载任意数量的指向该源的层。所以在我的“真实世界”示例中，我加载了 3 个源，并从这些源加载了 5 个层。
（仅供参考 - 由于某种原因，stack overflow 中的 built-in 代码片段工具未呈现底图按钮。如果您将代码准确复制到 JS fiddle 或 codepen 中，它将起作用）
我希望这对未来的人有所帮助 - 似乎很多人在管理顶部带有自定义图层的 Mapbox 样式时遇到了问题。我当然有。
mapboxgl.accessToken =
"pk.eyJ1IjoiamFtZXljc21pdGgiLCJhIjoiY2p4NTRzdTczMDA1dzRhbXBzdmFpZXV6eCJ9.-k7Um-xmYy4xhNDN6kDvpg";
var map = new mapboxgl.Map({
container: "map",
style: "mapbox://styles/mapbox/light-v10",
center: [-98, 38.88],
minZoom: 2,
zoom: 3
});
map.on("styledata", function() {
map.addSource("counties", {
type: "vector",
url: "mapbox://mapbox.82pkq93d"
});
map.addLayer({
id: "counties",
type: "fill",
source: "counties",
"source-layer": "original",
paint: {
"fill-outline-color": "rgba(0,0,0,0.1)",
"fill-color": "rgba(0,0,0,0.1)"
}
});
map.addLayer({
id: "counties-highlighted",
type: "fill",
source: "counties",
"source-layer": "original",
paint: {
"fill-outline-color": "#484896",
"fill-color": "#6e599f",
"fill-opacity": 0.75
},
filter: ["in", "FIPS", ""]
});
var layerList = document.getElementById("basemapmenu");
var inputs = layerList.getElementsByTagName("input");
function switchLayer(layer) {
var layerId = layer.target.id;
map.setStyle("mapbox://styles/mapbox/" + layerId);
}
for (var i = 0; i < inputs.length; i++) {
inputs[i].onclick = switchLayer;
}
});
// Disable default box zooming.
map.boxZoom.disable();
// Create a popup, but don't add it to the map yet.
var popup = new mapboxgl.Popup({
closeButton: false
});
var canvas = map.getCanvasContainer();
var start;
var current;
var box;
canvas.addEventListener("mousedown", mouseDown, true);
// Return the xy coordinates of the mouse position
function mousePos(e) {
var rect = canvas.getBoundingClientRect();
return new mapboxgl.Point(
e.clientX - rect.left - canvas.clientLeft,
e.clientY - rect.top - canvas.clientTop
);
}
function mouseDown(e) {
// Continue the rest of the function if the shiftkey is pressed.
if (!(e.shiftKey && e.button === 0)) return;
// Disable default drag zooming when the shift key is held down.
map.dragPan.disable();
// Call functions for the following events
document.addEventListener("mousemove", onMouseMove);
document.addEventListener("mouseup", onMouseUp);
document.addEventListener("keydown", onKeyDown);
// Capture the first xy coordinates
start = mousePos(e);
}
function onMouseMove(e) {
// Capture the ongoing xy coordinates
current = mousePos(e);
// Append the box element if it doesnt exist
if (!box) {
box = document.createElement("div");
box.classList.add("boxdraw");
canvas.appendChild(box);
}
var minX = Math.min(start.x, current.x),
maxX = Math.max(start.x, current.x),
minY = Math.min(start.y, current.y),
maxY = Math.max(start.y, current.y);
// Adjust width and xy position of the box element ongoing
var pos = "translate(" + minX + "px," + minY + "px)";
box.style.transform = pos;
box.style.WebkitTransform = pos;
box.style.width = maxX - minX + "px";
box.style.height = maxY - minY + "px";
}
function onMouseUp(e) {
// Capture xy coordinates
finish([start, mousePos(e)]);
}
function onKeyDown(e) {
// If the ESC key is pressed
if (e.keyCode === 27) finish();
}
function finish(bbox) {
// Remove these events now that finish has been called.
document.removeEventListener("mousemove", onMouseMove);
document.removeEventListener("keydown", onKeyDown);
document.removeEventListener("mouseup", onMouseUp);
if (box) {
box.parentNode.removeChild(box);
box = null;
}
// If bbox exists. use this value as the argument for `queryRenderedFeatures`
if (bbox) {
var features = map.queryRenderedFeatures(bbox, {
layers: ["counties"]
});
if (features.length >= 1000) {
return window.alert("Select a smaller number of features");
}
// Run through the selected features and set a filter
// to match features with unique FIPS codes to activate
// the `counties-highlighted` layer.
var filter = features.reduce(
function(memo, feature) {
memo.push(feature.properties.FIPS);
return memo;
}, ["in", "FIPS"]
);
map.setFilter("counties-highlighted", filter);
}
map.dragPan.enable();
}
map.on("mousemove", function(e) {
var features = map.queryRenderedFeatures(e.point, {
layers: ["counties-highlighted"]
});
// Change the cursor style as a UI indicator.
map.getCanvas().style.cursor = features.length ? "pointer" : "";
if (!features.length) {
popup.remove();
return;
}
var feature = features[0];
popup.setLngLat(e.lngLat).setText(feature.properties.COUNTY).addTo(map);
});
body {
margin: 0;
padding: 0;
}
#map {
position: absolute;
top: 0;
bottom: 0;
width: 100%;
}
#basemapmenu {
position: absolute;
display: inline-block;
background-color: transparent;
bottom: 0;
left: 0;
margin-left: 10px;
margin-bottom: 40px;
}
.boxdraw {
background: rgba(56, 135, 190, 0.1);
border: 2px solid #3887be;
position: absolute;
top: 0;
left: 0;
width: 0;
height: 0;
}
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"></script>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" />
<link href="https://api.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.css" rel="stylesheet" />
<script src="https://api.mapbox.com/mapbox-gl-js/v1.12.0/mapbox-gl.js"></script>
<div id="map"></div>
<div id='basemapmenu'>
<input id='light-v10' class='btn btn-outline-primary' type='button' name='rtoggle' value='Light' checked='checked'>
<input id='dark-v10' class='btn btn-outline-primary' type='button' name='rtoggle' value='Dark'>
<input id='satellite-v9' class='btn btn-outline-primary' type='button' name='rtoggle' value='Satellite'>
</div>