Add graphics with symbols

View on GitHub
Sample viewer app

Use a symbol style to display a graphic on a graphics overlay.

Image for Add graphics with symbols

Use case

Allows you to customize a graphic by assigning a unique symbol. For example, you may wish to display individual graphics for different landmarks across a region, and to style each one with a unique symbol.

How to use the sample

Pan and zoom around the map. Observe the graphics on the map.

How it works

  1. Create an AGSGraphicsOverlay and add it to the AGSMapView.
  2. Create an AGSSymbol such as AGSSimpleMarkerSymbol, AGSSimpleLineSymbol or AGSSimpleFillSymbol.
  3. Create an AGSGraphic, specifying an AGSGeometry and an AGSSymbol.
  4. Add the AGSGraphic to the AGSGraphicsOverlay.

Relevant API

  • AGSGeometry
  • AGSGraphic
  • AGSGraphicsOverlay
  • AGSSimpleFillSymbol
  • AGSSimpleLineSymbol
  • AGSSimpleMarkerSymbol

Additional information

To set a symbol style across a number of graphics (e.g. showing trees as graphics sharing a symbol in a park), see the "Add graphics with renderer" sample.

Tags

display, fill, graphics, line, marker, overlay, point, symbol

Sample Code

GraphicsWithSymbolsViewController.swift
                                                                                                                                                                                                                              
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
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
// 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

class GraphicsWithSymbolsViewController: UIViewController {
    @IBOutlet private var mapView: AGSMapView!

    private var graphicsOverlay: AGSGraphicsOverlay!

    override func viewDidLoad() {
        super.viewDidLoad()

        // add the source code button item to the right of navigation bar
        (self.navigationItem.rightBarButtonItem as! SourceCodeBarButtonItem).filenames = ["GraphicsWithSymbolsViewController"]

        // assign the map to the map view
        mapView.map = AGSMap(basemapStyle: .arcGISOceans)
        mapView.setViewpoint(AGSViewpoint(latitude: 56.075844, longitude: -2.681572, scale: 288895.277144))

        let graphicsOverlay = AGSGraphicsOverlay()
        mapView.graphicsOverlays.add(graphicsOverlay)

        // add some buoy positions to the graphics overlay
        addBuoyPoints(to: graphicsOverlay)
        // add boat trip polyline to graphics overlay
        addBoatTrip(to: graphicsOverlay)
        // add nesting ground polygon to graphics overlay
        addNestingGround(to: graphicsOverlay)
        // add text symbols and points to graphics overlay
        addText(to: graphicsOverlay)
    }

    private func addBuoyPoints(to graphicsOverlay: AGSGraphicsOverlay) {
        // define the buoy locations
        let buoy1Loc = AGSPoint(x: -2.712642647560347, y: 56.062812566811544, spatialReference: .wgs84())
        let buoy2Loc = AGSPoint(x: -2.6908416959572303, y: 56.06444173689877, spatialReference: .wgs84())
        let buoy3Loc = AGSPoint(x: -2.6697273884990937, y: 56.064250073402874, spatialReference: .wgs84())
        let buoy4Loc = AGSPoint(x: -2.6395150461199726, y: 56.06127916736989, spatialReference: .wgs84())

        // create a marker symbol
        let buoyMarker = AGSSimpleMarkerSymbol(style: .circle, color: .red, size: 10)

        // create graphics
        let buoyGraphic1 = AGSGraphic(geometry: buoy1Loc, symbol: buoyMarker, attributes: nil)
        let buoyGraphic2 = AGSGraphic(geometry: buoy2Loc, symbol: buoyMarker, attributes: nil)
        let buoyGraphic3 = AGSGraphic(geometry: buoy3Loc, symbol: buoyMarker, attributes: nil)
        let buoyGraphic4 = AGSGraphic(geometry: buoy4Loc, symbol: buoyMarker, attributes: nil)

        // add the graphics to the graphics overlay
        graphicsOverlay.graphics.addObjects(from: [buoyGraphic1, buoyGraphic2, buoyGraphic3, buoyGraphic4])
    }

    private func addText(to graphicsOverlay: AGSGraphicsOverlay) {
        let bassLocation = AGSPoint(x: -2.640631, y: 56.078083, spatialReference: .wgs84())
        let craigleithLocation = AGSPoint(x: -2.720324, y: 56.073569, spatialReference: .wgs84())

        // create text symbols
        let bassRockSymbol = AGSTextSymbol(text: "Bass Rock", color: UIColor(red: 0, green: 0, blue: 230 / 255.0, alpha: 1), size: 10, horizontalAlignment: AGSHorizontalAlignment.left, verticalAlignment: AGSVerticalAlignment.bottom)

        let craigleithSymbol = AGSTextSymbol(text: "Craigleith", color: UIColor(red: 0, green: 0, blue: 230 / 255.0, alpha: 1), size: 10, horizontalAlignment: AGSHorizontalAlignment.right, verticalAlignment: AGSVerticalAlignment.top)

        // define a graphic from the geometry and symbol
        let bassRockGraphic = AGSGraphic(geometry: bassLocation, symbol: bassRockSymbol, attributes: nil)
        let  craigleithGraphic = AGSGraphic(geometry: craigleithLocation, symbol: craigleithSymbol, attributes: nil)

        // add the text to the graphics overlay
        graphicsOverlay.graphics.add(bassRockGraphic)
        graphicsOverlay.graphics.add(craigleithGraphic)
    }

    private func addBoatTrip(to graphicsOverlay: AGSGraphicsOverlay) {
        // boat trip geometry
        let boatRoute = boatTripGeometry

        // define a line symbol
        let lineSymbol = AGSSimpleLineSymbol(
            style: .dash,
            color: UIColor(red: 0.5, green: 0, blue: 0.5, alpha: 1),
            width: 4)

        // create the graphic
        let boatTripGraphic = AGSGraphic(geometry: boatRoute, symbol: lineSymbol, attributes: nil)

        // add to the graphics overlay
        graphicsOverlay.graphics.add(boatTripGraphic)
    }

    private func addNestingGround(to graphicsOverlay: AGSGraphicsOverlay) {
        // nesting ground geometry
        let nestingGround = nestingGroundGeometry

        // define the fill symbol and outline
        let outlineSymbol = AGSSimpleLineSymbol(
            style: .dash,
            color: UIColor(red: 0, green: 0, blue: 0.5, alpha: 1),
            width: 1)
        let fillSymbol = AGSSimpleFillSymbol(
            style: .diagonalCross,
            color: UIColor(red: 0, green: 80 / 255.0, blue: 0, alpha: 1),
            outline: outlineSymbol)

        // nesting graphic
        let nestingGraphic = AGSGraphic(geometry: nestingGround, symbol: fillSymbol, attributes: nil)

        // add to graphics overlay
        graphicsOverlay.graphics.add(nestingGraphic)
    }

    private let boatTripGeometry: AGSPolyline = {
        // create a polyline
        let boatRoute = AGSPolylineBuilder(spatialReference: .wgs84())

        // add positions to the point collection
        boatRoute.addPointWith(x: -2.7184791227926772, y: 56.06147084563517)
        boatRoute.addPointWith(x: -2.7196807500463924, y: 56.06147084563517)
        boatRoute.addPointWith(x: -2.722084004553823, y: 56.062141712059706)
        boatRoute.addPointWith(x: -2.726375530459948, y: 56.06386674355254)
        boatRoute.addPointWith(x: -2.726890513568683, y: 56.0660708381432)
        boatRoute.addPointWith(x: -2.7270621746049275, y: 56.06779569383808)
        boatRoute.addPointWith(x: -2.7255172252787228, y: 56.068753913653914)
        boatRoute.addPointWith(x: -2.723113970771293, y: 56.069424653352335)
        boatRoute.addPointWith(x: -2.719165766937657, y: 56.07028701581465)
        boatRoute.addPointWith(x: -2.713672613777817, y: 56.070574465681325)
        boatRoute.addPointWith(x: -2.7093810878716917, y: 56.07095772883556)
        boatRoute.addPointWith(x: -2.7044029178205866, y: 56.07153261642126)
        boatRoute.addPointWith(x: -2.698223120515766, y: 56.072394931722265)
        boatRoute.addPointWith(x: -2.6923866452834355, y: 56.07325722773041)
        boatRoute.addPointWith(x: -2.68672183108735, y: 56.07335303720707)
        boatRoute.addPointWith(x: -2.6812286779275096, y: 56.07354465544585)
        boatRoute.addPointWith(x: -2.6764221689126497, y: 56.074215311778964)
        boatRoute.addPointWith(x: -2.6698990495353394, y: 56.07488595644139)
        boatRoute.addPointWith(x: -2.6647492184479886, y: 56.075748196715914)
        boatRoute.addPointWith(x: -2.659427726324393, y: 56.076131408423215)
        boatRoute.addPointWith(x: -2.654792878345778, y: 56.07622721075461)
        boatRoute.addPointWith(x: -2.651359657620878, y: 56.076514616319784)
        boatRoute.addPointWith(x: -2.6477547758597324, y: 56.07708942101955)
        boatRoute.addPointWith(x: -2.6450081992798125, y: 56.07814320736718)
        boatRoute.addPointWith(x: -2.6432915889173625, y: 56.08025069360931)
        boatRoute.addPointWith(x: -2.638656740938747, y: 56.08044227755186)
        boatRoute.addPointWith(x: -2.636940130576297, y: 56.078813783674946)
        boatRoute.addPointWith(x: -2.636425147467562, y: 56.07728102068079)
        boatRoute.addPointWith(x: -2.637798435757522, y: 56.076610417698504)
        boatRoute.addPointWith(x: -2.638656740938747, y: 56.07507756705851)
        boatRoute.addPointWith(x: -2.641231656482422, y: 56.07479015077557)
        boatRoute.addPointWith(x: -2.6427766058086277, y: 56.075748196715914)
        boatRoute.addPointWith(x: -2.6456948434247924, y: 56.07546078543464)
        boatRoute.addPointWith(x: -2.647239792750997, y: 56.074598538729404)
        boatRoute.addPointWith(x: -2.6492997251859376, y: 56.072682365868616)
        boatRoute.addPointWith(x: -2.6530762679833284, y: 56.0718200569986)
        boatRoute.addPointWith(x: -2.655479522490758, y: 56.070861913404286)
        boatRoute.addPointWith(x: -2.6587410821794135, y: 56.07047864929729)
        boatRoute.addPointWith(x: -2.6633759301580286, y: 56.07028701581465)
        boatRoute.addPointWith(x: -2.666637489846684, y: 56.07009538137926)
        boatRoute.addPointWith(x: -2.670070710571584, y: 56.06990374599109)
        boatRoute.addPointWith(x: -2.6741905754414645, y: 56.069137194910745)
        boatRoute.addPointWith(x: -2.678310440311345, y: 56.06808316228391)
        boatRoute.addPointWith(x: -2.682086983108735, y: 56.06789151689155)
        boatRoute.addPointWith(x: -2.6868934921235956, y: 56.06760404701653)
        boatRoute.addPointWith(x: -2.6911850180297208, y: 56.06722075051504)
        boatRoute.addPointWith(x: -2.695133221863356, y: 56.06702910083509)
        boatRoute.addPointWith(x: -2.698223120515766, y: 56.066837450202335)
        boatRoute.addPointWith(x: -2.7016563412406667, y: 56.06645414607839)
        boatRoute.addPointWith(x: -2.7061195281830366, y: 56.0660708381432)
        boatRoute.addPointWith(x: -2.7100677320166717, y: 56.065591697864576)
        boatRoute.addPointWith(x: -2.713329291705327, y: 56.06520838135397)
        boatRoute.addPointWith(x: -2.7167625124302273, y: 56.06453756828941)
        boatRoute.addPointWith(x: -2.718307461756433, y: 56.06348340989081)
        boatRoute.addPointWith(x: -2.719165766937657, y: 56.062812566811544)
        boatRoute.addPointWith(x: -2.7198524110826376, y: 56.06204587471371)
        boatRoute.addPointWith(x: -2.719165766937657, y: 56.06166252294756)
        boatRoute.addPointWith(x: -2.718307461756433, y: 56.06147084563517)

        return boatRoute.toGeometry()
    }()

    private let nestingGroundGeometry: AGSPolygon = {
        // create a polygon
        let nestingGround = AGSPolygonBuilder(spatialReference: .wgs84())

        // add points to the point collection
        nestingGround.addPointWith(x: -2.643077012566659, y: 56.077125346044475)
        nestingGround.addPointWith(x: -2.6428195210159444, y: 56.07717324600376)
        nestingGround.addPointWith(x: -2.6425405718360033, y: 56.07774804087097)
        nestingGround.addPointWith(x: -2.6427122328698127, y: 56.077927662508635)
        nestingGround.addPointWith(x: -2.642454741319098, y: 56.07829887790651)
        nestingGround.addPointWith(x: -2.641853927700763, y: 56.078526395253725)
        nestingGround.addPointWith(x: -2.6409741649024867, y: 56.078801809192434)
        nestingGround.addPointWith(x: -2.6399871139580795, y: 56.07881378366685)
        nestingGround.addPointWith(x: -2.6394077579689705, y: 56.07908919555142)
        nestingGround.addPointWith(x: -2.638764029092183, y: 56.07917301616904)
        nestingGround.addPointWith(x: -2.638485079912242, y: 56.07896945149566)
        nestingGround.addPointWith(x: -2.638570910429147, y: 56.078203080726844)
        nestingGround.addPointWith(x: -2.63878548672141, y: 56.077568418396)
        nestingGround.addPointWith(x: -2.6391931816767085, y: 56.077197195961084)
        nestingGround.addPointWith(x: -2.6399441986996273, y: 56.07675411934114)
        nestingGround.addPointWith(x: -2.6406523004640934, y: 56.076730169108444)
        nestingGround.addPointWith(x: -2.6406737580933193, y: 56.07632301287509)
        nestingGround.addPointWith(x: -2.6401802326211157, y: 56.075999679860494)
        nestingGround.addPointWith(x: -2.6402446055087943, y: 56.075844000034046)
        nestingGround.addPointWith(x: -2.640416266542604, y: 56.07578412301025)
        nestingGround.addPointWith(x: -2.6408883343855822, y: 56.075808073830935)
        nestingGround.addPointWith(x: -2.6417680971838577, y: 56.076239186057734)
        nestingGround.addPointWith(x: -2.642197249768383, y: 56.076251161328514)
        nestingGround.addPointWith(x: -2.6428409786451708, y: 56.07661041772168)
        nestingGround.addPointWith(x: -2.643077012566659, y: 56.077125346044475)

        return nestingGround.toGeometry()
    }()
}

Your browser is no longer supported. Please upgrade your browser for the best experience. See our browser deprecation post for more details.