Javascript 如何标记以编程方式生成的要素图层?
我是ESRI ArcGIS API for Javascript的新手,我正在尝试以编程方式生成要素层,然后向其中添加标签层。要素图层似乎可以工作,但标签图层没有提供任何输出(也没有错误)。有人能告诉我我做错了什么吗 jsfiddle: 相关javascript:Javascript 如何标记以编程方式生成的要素图层?,javascript,arcgis,arcgis-js-api,Javascript,Arcgis,Arcgis Js Api,我是ESRI ArcGIS API for Javascript的新手,我正在尝试以编程方式生成要素层,然后向其中添加标签层。要素图层似乎可以工作,但标签图层没有提供任何输出(也没有错误)。有人能告诉我我做错了什么吗 jsfiddle: 相关javascript: var layerDefinition = { "geometryType": "esriGeometryPoint", "fields": [ { "name": "__OBJ
var layerDefinition = {
"geometryType": "esriGeometryPoint",
"fields": [
{
"name": "__OBJECTID",
"alias": "__OBJECTID",
"type": "esriFieldTypeOID",
}, {
"name": "testfield",
"alias": "testfield",
"type": "esriFieldTypeString"
}
]
}
var featureCollection = {
layerDefinition: layerDefinition,
featureSet: null
};
var fl = new FeatureLayer(featureCollection, {
id: "featurelayer",
outFields: ["testfield"]
})
var m = new esri.Graphic(new esri.geometry.Point(-77, 40), pushpin);
m.attributes = {
"testfield": "test value"
};
fl.add(m);
map.addLayer(fl);
// create a text symbol to define the style of labels
var testLabel = new TextSymbol().setColor(new Color("#666666"));
testLabel.font.setSize("14pt");
testLabel.font.setFamily("arial");
testLabelRenderer = new SimpleRenderer(testLabel);
var labels = new LabelLayer({
id: "labels"
});
labels.addFeatureLayer(fl, testLabelRenderer, "{testfield}");
// add the label layer to the map
map.addLayer(labels);
以下是一个更新版本,但有一个更改: 到
创建地图时,请尝试将地图的showLabels选项设置为true 默认情况下为false。
map=newmap(“mapDiv”,{showLabels:true}) 这不是完整的解决方案,但却是正确和重要的。
var m = new esri.Graphic(new esri.geometry.Point(-77, 40), pushpin);
var m = new esri.Graphic(esri.geometry.geographicToWebMercator(new esri.geometry.Point(-77, 40)), pushpin);