Latest Contributions by ShiminCai

Hi All, The line json constructed from points worked. It only took 3 seconds to draw lines for 22000 points. Here is the function in case anybody else needs it: @IBAction func convertTrackPointToLine(sender: UIBarButtonItem)     {         if self.trackPointLineOn         {             self.trackPointLineOn = false             self.trackPointToLineButton.tintColor = nil             self.mapView.removeMapLayerWithName(TRACKPOINTLINELAYERNAME)             self.trackPointLineGraphicLayer = nil         }         else         {             let query = AGSQuery()             query.outFields = ["TrackID", "TrackPointNo", "Description", "Contractor", "Operation", "OperationDetail"]             query.orderByFields = ["TrackID ASC", "TrackPointNo ASC"]             query.geometry = self.mapView.visibleArea()             query.spatialRelationship = AGSSpatialRelationship.Intersects             query.returnGeometry = true                         let trackPointsFeatureTable = self.trackPointsLayer.table             trackPointsFeatureTable.queryResultsWithParameters(query)             {                 (features: [AnyObject]!, error: NSError!) -> Void in                 if error != nil                 {                     logAppStatus("Error querying the TrackPoints layer: " + "\(error)", newLine: "\n")                     FCNSWUtils.showAlertWithTitle("Query Error", andMessage: "Error querying the TrackPoints layer: " + "\(error).")                 }                 else                 {                     let featureSet = AGSFeatureSet(features: features)                                         let lineJsonPart1 = "{\"paths\":[["                     var lineJsonPart2 = ""                     let lineJsonPart3 = "]],\"spatialReference\":{\"wkid\":3308}}"                                         var count = 0                     for feature: AGSGDBFeature in featureSet.features as! [AGSGDBFeature]                     {                         let point : AGSPoint = feature.geometry as! AGSPoint                         let pointJsonValue = point.encodeToJSON() as NSDictionary                         let x: Double = pointJsonValue.valueForKey("x") as! Double                         let y: Double = pointJsonValue.valueForKey("y") as! Double                         let pointXY = "[\(x),\(y)]"                         if count == 0                         {                             lineJsonPart2 += pointXY                         }                         else                         {                             lineJsonPart2 += "," + pointXY                         }                                                 count++                     }                                         let lineJson = lineJsonPart1 + lineJsonPart2 + lineJsonPart3                     let lineJsonValue = (lineJson as NSString).ags_JSONValue() as! NSDictionary                     let lineGeometry = AGSPolyline(JSON: lineJsonValue as [NSObject : AnyObject], spatialReference: self.mapView.spatialReference)                                         self.trackPointLineGraphicLayer = AGSGraphicsLayer.graphicsLayer() as! AGSGraphicsLayer                     self.mapView.addMapLayer(self.trackPointLineGraphicLayer, withName: TRACKPOINTLINELAYERNAME)                                         let blueSimpleLineSymbol = AGSSimpleLineSymbol.init(color: UIColor.blueColor())                     let blueSimpleLineGraphic = AGSGraphic.graphicWithGeometry(lineGeometry, symbol: blueSimpleLineSymbol, attributes: nil) as! AGSGraphic                     self.trackPointLineGraphicLayer.addGraphic(blueSimpleLineGraphic)                                         self.trackPointLineOn = true                     self.trackPointToLineButton.tintColor = UIColor.cyanColor()                 }             }         }     } Cheers, Shimin ... View more