Add feature collection layer from table

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 // Copyright 2025 Esri // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // https://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License.  import ArcGIS import SwiftUI  struct AddFeatureCollectionLayerFromTableView: View {  /// A map with an ocean basemap style.  @State private var map: Map = {  let map = Map(basemapStyle: .arcGISOceans)  map.initialViewpoint = Viewpoint(  latitude: 8.849289,  longitude: -79.497238,  scale: 1e6  )  return map  }()   /// The error shown in the error alert.  @State private var error: Error?   var body: some View {  MapView(map: map)  .task {  do {  // Adds feature collection layer to the map.  async let pointsTable = pointsCollectionTable()  async let linesTable = linesCollectionTable()  async let polygonsTable = polygonsCollectionTable()  let featureCollectionTables = try await [pointsTable, linesTable, polygonsTable]  let featureCollectionLayer = FeatureCollectionLayer(  featureCollection: FeatureCollection(featureCollectionTables: featureCollectionTables)  )  map.addOperationalLayer(featureCollectionLayer)  } catch {  // Updates the error and shows an alert if any failure occurs.  self.error = error  }  }  .errorAlert(presentingError: $error)  }   /// Creates a points feature collection table.  /// - Returns: A feature collection table with points.  private func pointsCollectionTable() async throws -> FeatureCollectionTable {  // Creates a schema for points feature collection table.  let placeField = Field(  type: .text,  name: "Place",  alias: "Place name",  length: 40,  isEditable: true,  isNullable: false  )   // Initializes a feature collection table with the fields created and  // point geometry type.  let pointsCollectionTable = FeatureCollectionTable(  fields: [placeField],  geometryType: Point.self,  spatialReference: .wgs84  )  pointsCollectionTable.renderer = SimpleRenderer(  symbol: SimpleMarkerSymbol(style: .triangle, color: .red, size: 18)  )   // Creates a new point with geometry and attribute values.  let pointFeature = pointsCollectionTable.makeFeature(  attributes: ["Place": "Current location"],  geometry: Point(latitude: 8.849289, longitude: -79.497238)  )   // Adds feature to the feature collection table.  try await pointsCollectionTable.add(pointFeature)  return pointsCollectionTable  }   /// Creates a polylines feature collection table.  /// - Returns: A feature collection table with polylines.  private func linesCollectionTable() async throws -> FeatureCollectionTable {  // Creates a schema for polylines feature collection table.  let boundaryField = Field(  type: .text,  name: "Boundary",  alias: "Boundary name",  length: 40,  isEditable: true,  isNullable: false  )   // Initializes a feature collection table with the fields created and  // polyline geometry type.  let linesCollectionTable = FeatureCollectionTable(  fields: [boundaryField],  geometryType: Polyline.self,  spatialReference: .wgs84  )  linesCollectionTable.renderer = SimpleRenderer(  symbol: SimpleLineSymbol(style: .dash, color: .green, width: 3)  )   // Creates a new polyline with geometry and attribute values.  let lineFeature = linesCollectionTable.makeFeature(  attributes: ["Boundary": "AManAPlanACanalPanama"],  geometry: Polyline(  points: [  Point(latitude: 8.849289, longitude: -79.497238),  Point(latitude: 9.432302, longitude: -80.035568)  ]  )  )   // Adds feature to the feature collection table.  try await linesCollectionTable.add(lineFeature)  return linesCollectionTable  }   /// Creates a polygons feature collection table.  /// - Returns: A feature collection table with polygons.  private func polygonsCollectionTable() async throws -> FeatureCollectionTable {  // Creates a schema for polygons feature collection table.  let areaField = Field(  type: .text,  name: "Area",  alias: "Area name",  length: 40,  isEditable: true,  isNullable: false  )   // Initializes a feature collection table with the fields created and  // polygon geometry type.  let polygonsCollectionTable = FeatureCollectionTable(  fields: [areaField],  geometryType: Polygon.self,  spatialReference: .wgs84  )  let lineSymbol = SimpleLineSymbol(style: .solid, color: .blue, width: 2)  let fillSymbol = SimpleFillSymbol(style: .diagonalCross, color: .cyan, outline: lineSymbol)  polygonsCollectionTable.renderer = SimpleRenderer(symbol: fillSymbol)   // Creates a new polygon with geometry and attribute values.  let polygonFeature = polygonsCollectionTable.makeFeature(  attributes: ["Area": "Restricted area"],  geometry: Polygon(  points: [  Point(latitude: 8.849289, longitude: -79.497238),  Point(latitude: 8.638903, longitude: -79.337936),  Point(latitude: 8.895422, longitude: -79.11409)  ]  )  )   // Adds feature to the feature collection table.  try await polygonsCollectionTable.add(polygonFeature)  return polygonsCollectionTable  } }  #Preview {  AddFeatureCollectionLayerFromTableView() }