本文介绍使用ArcGIS API for JS 4.7在二维和三维模式下加载FeatureLayer，实现点击要素弹出信息及高亮显示的方法。针对二维模式下高亮接口未生效的问题，提供了自定义高亮解决方案。
转载：ArcGIS API for JS4.7加载FeatureLayer，点击弹出信息并高亮显示
我加载的是ArcGIS Server本地发布的FeatureService，ArcGIS API for JS4.7记载FeatureLayer时，在二维需要通过代码启用WebGL渲染，在三维模式下，则不需要。不启用WebGL，则无法显示进行高亮显示。我在二维模式下，高亮接口是没有生效，因此，二维模式下，自己写了一个高亮，三维还是用的自带的高亮。
二维模式代码：
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>要素服务
</title>
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<link type="text/css" rel="stylesheet" href="http://localhost/arcgis/esri/css/main.css"/>
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<link type="text/css" rel="stylesheet" href="css/index.css"/>
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<script>
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//高亮显示只能在WebGL渲染时才能生效，该功能目前处于beta阶段
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var dojoConfig = {
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has: {
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"esri-featurelayer-webgl":
1
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}
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}
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</script>
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<script src="http://localhost/arcgis/">
</script>
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</head>
-
<body>
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<div id="viewDiv">
</div>
-
-
<script>
-
require([
"esri/Map",
"esri/views/MapView",
"esri/config",
"esri/layers/FeatureLayer",
"dojo/domReady"],
function (Map, MapView, esriConfig, FeatureLayer) {
-
esriConfig.request.corsEnabledServers.push(
"localhost:6443");
//设置地图服务器已允许跨域
-
esriConfig.request.corsEnabledServers.push(
"localhost:63342");
-
var map =
new
Map({
-
// basemap: "streets"//ESRI提供的底 图
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basemap:
"dark-gray"
-
});
-
//二维视图，并初始化视图位置
-
var view =
new MapView({
-
container:
"viewDiv",
-
map: map,
-
extent: {
-
xmin:
111.27418783887504,
-
ymin:
27.65361115167269,
-
xmax:
119.18589568326072,
-
ymax:
30.663629324047992,
-
spatialReference:
4326
-
}
-
});
-
//乡镇级属性模版
-
var popupTemplate = {
-
title:
"乡镇数据",
-
content: [{
-
type:
"fields",
-
fieldInfos: [{
-
fieldName:
"name",
-
label:
"行政单位名称",
-
format: {
-
places:
0,
-
digitSeparator:
true
-
}
-
}, {
-
fieldName:
"code",
-
label:
"行政单位代码",
-
format: {
-
places:
0,
-
digitSeparator:
true
-
}
-
}, {
-
fieldName:
"supercode",
-
label:
"上级行政单位代码",
-
format: {
-
places:
0,
-
digitSeparator:
true
-
}
-
}, {
-
fieldName:
"level",
-
label:
"行政单位等级",
-
format: {
-
places:
0,
-
digitSeparator:
true
-
}
-
}]
-
}]
-
};
-
var town =
new FeatureLayer({
-
url:
"https://localhost:6443/arcgis/rest/services/jiangxi/FeatureServer/0",
-
outFields: [
"*"],
-
popupTemplate: popupTemplate
-
});
//乡镇级数据
-
popupTemplate.title =
"县级数据";
-
var county =
new FeatureLayer({
-
url:
"https://localhost:6443/arcgis/rest/services/jiangxi/FeatureServer/1",
-
outFields: [
"*"],
-
popupTemplate: popupTemplate
-
});
//县级数据
-
popupTemplate.title =
"市级数据";
-
var city =
new FeatureLayer({
-
url:
"https://localhost:6443/arcgis/rest/services/jiangxi/FeatureServer/2",
-
outFields: [
"*"],
-
popupTemplate: popupTemplate
-
});
//市级数据
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popupTemplate.title =
"省级数据";
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var province =
new FeatureLayer({
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url:
"https://localhost:6443/arcgis/rest/services/jiangxi/FeatureServer/3",
-
outFields: [
"*"],
-
popupTemplate: popupTemplate
-
});
//省级数据
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map.add(town);
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map.add(county);
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map.add(city);
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map.add(province);
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//点击视窗进行碰撞检测，检测点击的目标graphic
-
view.on(
"click",
function (evt) {
-
view.hitTest(evt).then(
function (response) {
-
var result = response.results[
0];
-
if (result && result.graphic) {
-
console.log(result);
-
var graphic = result.graphic;
-
//自定义高亮
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//这里的几何图形是面状，配置graphic的symbol为fillSymbol
-
graphic.symbol = {
-
type:
"simple-fill",
-
color:
"red",
-
outline: {
-
color: [
128,
128,
128,
0.5],
-
width:
"0.5px"
-
}
-
};
-
view.graphics.removeAll();
//清除上一次点击目标
-
view.graphics.add(graphic);
//添加新的点击目标
-
}
-
})
-
});
-
})
-
</script>
-
</body>
-
</html>
二维模式效果图：
三维模式代码：
-
<!DOCTYPE html>
-
<html lang="en">
-
<head>
-
<meta charset="UTF-8">
-
<title>要素服务
</title>
-
<link type="text/css" rel="stylesheet" href="http://localhost/arcgis/esri/css/main.css"/>
-
<link type="text/css" rel="stylesheet" href="css/index.css"/>
-
<script src="http://localhost/arcgis/init.js">
</script>
-
</head>
-
<body>
-
<div id="viewDiv">
</div>
-
<script>
-
require([
"esri/Map",
"esri/views/SceneView",
"esri/config",
"esri/layers/FeatureLayer",
"dojo/domReady"],
function (Map, SceneView, esriConfig, FeatureLayer) {
-
esriConfig.request.corsEnabledServers.push(
"localhost:6443");
//设置地图服务器已允许跨域
-
esriConfig.request.corsEnabledServers.push(
"localhost:63342");
-
var map =
new
Map({
-
basemap:
"dark-gray"
-
});
-
//二维视图，并初始化视图位置
-
var view =
new SceneView({
-
container:
"viewDiv",
-
map: map,
-
extent: {
-
xmin:
111.27418783887504,
-
ymin:
27.65361115167269,
-
xmax:
119.18589568326072,
-
ymax:
30.663629324047992,
-
spatialReference:
4326
-
}
-
});
-
//乡镇级属性模版
-
var popupTemplate = {
-
title:
"乡镇数据",
-
content: [{
-
type:
"fields",
-
fieldInfos: [{
-
fieldName:
"name",
-
label:
"行政单位名称",
-
format: {
-
places:
0,
-
digitSeparator:
true
-
}
-
}, {
-
fieldName:
"code",
-
label:
"行政单位代码",
-
format: {
-
places:
0,
-
digitSeparator:
true
-
}
-
}, {
-
fieldName:
"supercode",
-
label:
"上级行政单位代码",
-
format: {
-
places:
0,
-
digitSeparator:
true
-
}
-
}, {
-
fieldName:
"level",
-
label:
"行政单位等级",
-
format: {
-
places:
0,
-
digitSeparator:
true
-
}
-
}]
-
}]
-
};
-
var town =
new FeatureLayer({
-
url:
"https://localhost:6443/arcgis/rest/services/jiangxi/FeatureServer/0",
-
outFields: [
"*"],
-
popupTemplate: popupTemplate
-
});
//乡镇级数据
-
popupTemplate.title =
"县级数据";
-
var county =
new FeatureLayer({
-
url:
"https://localhost:6443/arcgis/rest/services/jiangxi/FeatureServer/1",
-
outFields: [
"*"],
-
popupTemplate: popupTemplate
-
});
//县级数据
-
popupTemplate.title =
"市级数据";
-
var city =
new FeatureLayer({
-
url:
"https://localhost:6443/arcgis/rest/services/jiangxi/FeatureServer/2",
-
outFields: [
"*"],
-
popupTemplate: popupTemplate
-
});
//市级数据
-
popupTemplate.title =
"省级数据";
-
var province =
new FeatureLayer({
-
url:
"https://localhost:6443/arcgis/rest/services/jiangxi/FeatureServer/3",
-
outFields: [
"*"],
-
popupTemplate: popupTemplate
-
});
//省级数据
-
map.add(town);
-
map.add(county);
-
map.add(city);
-
map.add(province);
-
})
-
</script>
-
</body>
-
</html>
三维模式效果图：
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