Question

在完成剩下的代码之前，我无法完成labelPoints。我知道这是某种延迟/回调问题，我不理解，也无法找到很多如何使用esri javascript api执行此操作的示例。

基本上我使用质心，我可以从地址搜索创建一个点击点，但在奇形状的多边形上，我需要使用labelPoints来确保该点实际上在多边形中。

executeQeries（）在if中正常工作，但在else中它没有正确运行，因为executeQueries（）在检索labelPoints之前发生。我尝试添加.on（＆＃34; label-points-complete＆＃34;）来激活executeQueries（），但这看起来并没有帮助。在执行其余的操作之前，只是尝试从labelPoint获取几何体。我尝试了这1000种方法却没有成功。感谢您的任何提示。

function symbolizeFoundFeatures(featureSet) {
    //If we get a result set
    if (featureSet.features.length > 0) {
    //Highlight the feature
    var polygonJson = { "rings": featureSet.features[0].geometry.rings, "spatialReference": map.spatialReference };
    var selectedGeometry = featureSet.features[0].geometry;
    searchedGraphic = map.graphics.add(new esri.Graphic(new esri.geometry.Polygon(polygonJson), 
        new esri.symbol.SimpleFillSymbol(
            esri.symbol.SimpleLineSymbol.STYLE_SOLID,
            new esri.symbol.SimpleLineSymbol(esri.symbol.SimpleLineSymbol.STYLE_SOLID,
            new esri.Color([0, 0, 0, 1]), 1),
            new esri.Color([255, 0, 0, 0.2]))
        ));

    selectedCentroid = searchedGraphic.geometry.getExtent().getCenter();
    var markerSymbol = map.graphics.add(new SimpleMarkerSymbol(SimpleMarkerSymbol.STYLE_SQUARE, 10,
        new SimpleLineSymbol(SimpleLineSymbol.STYLE_SOLID,
        new Color([255, 0, 0]), 1),
        new Color([0, 255, 0, 0.25])
    ));
    var searchedGraphicPoint = new Graphic(selectedCentroid, markerSymbol);

//the if here runs everything perfectly
    if (searchedGraphic.geometry.contains(selectedCentroid)) {
        useThisPointToInitiateClick = selectedCentroid;
        executeFromSearchedPoint = "Yes";
        executeQueries();
    }
    else 
      {geometryService.labelPoints([searchedGraphic.geometry], function (labelPoints) {
         console.log("in contains else ");
         var searchedGraphicLabelPoint = new Graphic(labelPoints[0], markerSymbol);
         map.graphics.add(searchedGraphicLabelPoint);
         useThisPointToInitiateClick = labelPoints[0];
         console.log(useThisPointToInitiateClick);
         executeFromSearchedPoint = "Yes";
         console.log("before execute queries, after adding center points");
     });
     }
     }
}

geometryService.on("label-points-complete", function (evt) {
     console.log("hi");
     console.log(executeFromSearchedPoint);
     executeQueries();
});

Answer 1

只需在labelPoints回调中调用executeQueries（）？

并删除geometryService.on("label-points-complete

else 
      {geometryService.labelPoints([searchedGraphic.geometry], function (labelPoints) {
         console.log("in contains else ");
         var searchedGraphicLabelPoint = new Graphic(labelPoints[0], markerSymbol);
         map.graphics.add(searchedGraphicLabelPoint);
         useThisPointToInitiateClick = labelPoints[0];
         console.log(useThisPointToInitiateClick);
         executeFromSearchedPoint = "Yes";
         console.log("before execute queries, after adding center points");
executeQueries();
     });
     }

在继续使用代码 - labelPoints之前，让esri javascript api中的延迟完成

1 个答案: