我是ESRI ArcGIS API for Javascript的新手,我正在尝试以编程方式生成要素图层,然后为其添加标签图层。功能层似乎有效,但标签层不提供输出(也没有错误)。有人能告诉我我做错了吗?
jsfiddle:http://jsfiddle.net/9X46z/
相关的javascript:
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);
答案 0 :(得分:2)
这是一个更新版本,只有一处更改:http://jsfiddle.net/2WccC/1/
var m = new esri.Graphic(new esri.geometry.Point(-77, 40), pushpin);
到
var m = new esri.Graphic(esri.geometry.geographicToWebMercator(new esri.geometry.Point(-77, 40)), pushpin);
答案 1 :(得分:1)
尝试在创建地图时将Map的showLabels选项设置为true 这默认是假的。 map = new Map(“mapDiv”,{showLabels:true});