An end-user performing a survey may want to add features to the map during the course of their work.
How to use the sample
Tap on a location on the map to add a feature at that location.
How it works
An AGSFeature instance is added to an AGSServiceFeatureTable. Apply edits on the ServiceGeodatabase which contains the feature table to push the edits to the server.
Create and load an AGSServiceFeatureTable with a feature service URL.
Get the AGSServiceFeatureTable from the service geodatabase.
Create an AGSFeatureLayer from the service feature table.
Create an AGSFeature with attributes and a location using the AGSServiceFeatureTable.
Add the AGSFeature to the AGSServiceFeatureTable.
Apply edits to the AGSServiceGeodatabase by calling AGSServiceFeatureTable.applyEdits(completion:), which will upload the new feature to the online service.
Relevant API
AGSFeature
AGSFeatureEditResult
AGSFeatureLayer
AGSServiceFeatureTable
AGSServiceGeodatabase
Tags
edit, feature, online service
Sample Code
AddFeaturesViewController.swift
Use dark colors for code blocksCopy
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
// Copyright 2016 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//// http://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 UIKit
import ArcGIS
classAddFeaturesViewController: UIViewController, AGSGeoViewTouchDelegate{
@IBOutletvar mapView: AGSMapView! {
didSet {
mapView.map =AGSMap(basemapStyle: .arcGISStreets)
// Set touch delegate on map view as self. mapView.touchDelegate =self }
}
/// The service geodatabase that contains damaged property features.var serviceGeodatabase: AGSServiceGeodatabase!
/// The feature table to add features to.var featureTable: AGSServiceFeatureTable!
overridefuncviewDidLoad() {
super.viewDidLoad()
// Add the source code button item to the right of navigation bar. (navigationItem.rightBarButtonItem as?SourceCodeBarButtonItem)?.filenames = ["AddFeaturesViewController"]
// Load the service geodatabase.let damageFeatureService =URL(string: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/DamageAssessment/FeatureServer")! loadServiceGeodatabase(from: damageFeatureService)
}
/// Load and set a service geodatabase from a feature service URL./// - Parameter serviceURL: The URL to the feature service.funcloadServiceGeodatabase(fromserviceURL: URL) {
let serviceGeodatabase =AGSServiceGeodatabase(url: serviceURL)
serviceGeodatabase.load { [weakself] error inguardletself=selfelse { return }
iflet error = error {
self.presentAlert(error: error)
} else {
let featureTable = serviceGeodatabase.table(withLayerID: 0)!self.featureTable = featureTable
self.serviceGeodatabase = serviceGeodatabase
// Add the feature layer to the operational layers on map.let featureLayer =AGSFeatureLayer(featureTable: featureTable)
self.mapView.map?.operationalLayers.add(featureLayer)
self.mapView.setViewpoint(AGSViewpoint(center: AGSPoint(x: 544871.19, y: 6806138.66, spatialReference: .webMercator()), scale: 2e6))
}
}
}
/// Add a feature at the tapped point./// - Parameter mapPoint: The point where user tapped.funcaddFeature(atmapPoint: AGSPoint) {
// Disable interaction with map view. mapView.isUserInteractionEnabled =false// Normalize geometry.let normalizedGeometry =AGSGeometryEngine.normalizeCentralMeridian(of: mapPoint)!// Attributes for the new feature.let featureAttributes = ["typdamage": "Minor", "primcause": "Earthquake"]
// Create a new feature.let feature = featureTable.createFeature(attributes: featureAttributes, geometry: normalizedGeometry)
// Add the feature to the feature table. featureTable.add(feature) { [weakself] (error: Error?) inguardletself=selfelse { return }
// Enable interaction with map view.self.mapView.isUserInteractionEnabled =trueiflet error = error {
self.presentAlert(message: "Error while adding feature: \(error.localizedDescription)")
} else {
// Applied edits on success.self.applyEdits()
}
}
}
/// Apply local edits to the geodatabase.funcapplyEdits() {
guard serviceGeodatabase.hasLocalEdits() else { return }
serviceGeodatabase.applyEdits { [weakself] _, error iniflet error = error {
self?.presentAlert(message: "Error while applying edits: \(error.localizedDescription)")
}
}
}
// MARK: - AGSGeoViewTouchDelegatefuncgeoView(_geoView: AGSGeoView, didTapAtScreenPointscreenPoint: CGPoint, mapPoint: AGSPoint) {
// Add a feature at the tapped location. addFeature(at: mapPoint)
}
}