Show callout

View on GitHub

Show a callout with the latitude and longitude of user-tapped points.

Screenshot of show callout sample

Use case

Callouts are used to display temporary detail content on a map. You can display text and arbitrary UI controls in callouts.

How to use the sample

Tap anywhere on the map. A callout showing the WGS 84 coordinates in latitude and longitude for the tapped point will appear.

How it works

  1. Define an optional LocationCalloutPlacement.
  2. Use the onSingleTapGesture(perform:) map view modifier to update the location callout placement.
  3. Use the callout(placement:content:) map view modifier with the location callout placement to display a callout.

Relevant API

  • LocationCalloutPlacement
  • MapView.callout(placement:content:)

Tags

balloon, bubble, callout, flyout, flyover, info window, popup, tap

Sample Code

ShowCalloutView.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
// Copyright 2022 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 ShowCalloutView: View {
    /// A map with a topographic basemap style.
    @State private var map = Map(basemapStyle: .arcGISTopographic)

    /// A location callout placement.
    @State private var calloutPlacement: CalloutPlacement?

    /// The tap location.
    @State private var tapLocation: Point!

    var body: some View {
        MapView(map: map)
            .onSingleTapGesture { _, mapPoint in
                tapLocation = mapPoint
                if calloutPlacement == nil {
                    // Projects the point to the WGS 84 spatial reference.
                    let location = GeometryEngine.project(mapPoint, into: .wgs84)!
                    // Shows the callout at the tapped location.
                    calloutPlacement = CalloutPlacement.location(location)
                } else {
                    // Hides the callout.
                    calloutPlacement = nil
                }
            }
            .callout(placement: $calloutPlacement.animation(.default.speed(2))) { _ in
                VStack(alignment: .leading) {
                    Text("Location")
                        .font(.headline)
                    Text(
                        CoordinateFormatter.latitudeLongitudeString(
                            from: tapLocation,
                            format: .decimalDegrees,
                            decimalPlaces: 2
                        )
                    )
                    .font(.callout)
                }
                .padding(5)
            }
    }
}

#Preview {
    ShowCalloutView()
}

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

You can no longer sign into this site. Go to your ArcGIS portal or the ArcGIS Location Platform dashboard to perform management tasks.

Your ArcGIS portal

Create, manage, and access API keys and OAuth 2.0 developer credentials, hosted layers, and data services.

Your ArcGIS Location Platform dashboard

Manage billing, monitor service usage, and access additional resources.

Learn more about these changes in the What's new in Esri Developers June 2024 blog post.

Close