Work with location search

Amplify iOS v1 is now in Maintenance Mode until May 31st, 2024. This means that we will continue to include updates to ensure compatibility with backend services and security. No new features will be introduced in v1.

Please use the latest version (v2) of Amplify Library for Swift to get started.

If you are currently using v1, follow these instructions to upgrade to v2.

Add location search functionality on a map

First, make sure you've provisioned a search index resource and configured your app using the instructions in either Configure Location Search or Use existing Amazon Location Service resources and you have already setup displaying a map in your application.

To add a location search UI component to your AMLMapView, you will add an AMLSearchBar to your View in your desired layout. Upon searching, Geo.Places are converted to MGLPointFeatures using AmplifyMapLibre.createFeatures(places). Lastly assign those converted MGLPointFeatures to mapState.features. Alternatively, you can leverage the AMLMapCompositeView directly, which includes an AMLSearchBar among other pre-configured UI components.

1import SwiftUI
2import AmplifyMapLibreUI
3import AmplifyMapLibreAdapter
4import Amplify
5
6struct MyMapView: View {
7
8    @StateObject private var mapState = AMLMapViewState()
9    @State private var searchText = ""
10    @State private var displayState: AMLSearchBar.DisplayState = .map
11
12    var body: some View {
13        ZStack(alignment: .top) {
14            AMLMapView(mapState: mapState)
15                .edgesIgnoringSafeArea(.all)
16
17            AMLSearchBar(
18                text: $searchText,
19                displayState: $displayState,
20                onCommit: search,
21                onCancel: { mapState.features = [] }
22            )
23            .padding()
24        }
25    }
26
27    private func search() {
28        let searchArea = Geo.SearchArea.near(mapState.center)
29        let searchOptions = Geo.SearchForTextOptions(area: searchArea)
30        Amplify.Geo.search(for: searchText, options: searchOptions) { result in
31            switch result {
32            case .success(let places):
33                DispatchQueue.main.async {
34                    mapState.features = AmplifyMapLibre.createFeatures(places)
35                }
36            case .failure(let geoError):
37                print(geoError)
38            }
39        }
40    }
41}

Customize Feature Icons

You can customize the feature images displayed on the AMLMapView or AMLMapCompositeView, you can leverage the featureImage() view modifier.

1var body: some View {
2        AMLMapView(mapState: mapState)
3            .featureImage {
4                let image = UIImage(
5                    systemName: "paperplane.circle.fill",
6                    withConfiguration: UIImage.SymbolConfiguration(
7                        font: .systemFont(ofSize: 22, weight: .medium)
8                    )
9                )!
10                return image
11             }
12            .edgesIgnoringSafeArea(.all)
13    }

AMLMapView featureImage view modifier

Location-based search capabilities

Amplify Geo enables you to search for locations by text, addresses, or geo-coordinates.

Search for text

The Amplify.Geo.search(for text:) API enables you to search for places or points of interest by free-form text, such as an address, name, city, or region.

1Amplify.Geo.search(for: "coffee shops") { result in
2    switch result {
3    case .failure(let error):
4        print(error)
5    case .success(let places):
6        dump(places)
7    }
8}

You can refine your search by specifying following parameters inside Geo.SearchForTextOptions

area
- .near - to act as the search origination location.
- .within - to limit the area to search within.
countries - to limit the search results to given countries.
maxResults - to limit the maximum result set (defaults to 50).

1let coordinates = Geo.Coordinates(latitude: 47.62246, longitude: -122.336775)
2let options = Geo.SearchForTextOptions(area: .near(coordinates),
3                                       countries: [.usa, .can],
4                                       maxResults: 25)
5                                       
6Amplify.Geo.search(for: "coffee shops", options: options) { result in
7    switch result {
8    case .failure(let error):
9        print(error)
10    case .success(let places):
11        dump(places)
12    }
13}

Search for coordinates

The Amplify.Geo.search(for coordinates:) API is a reverse Geocoder that takes a coordinate point and returns information about what it finds at that point on the map.

1Amplify.Geo.search(for: coordinates) { result in
2    switch result {
3    case .failure(let error):
4        print(error)
5    case .success(let places):
6        dump(places)
7    }
8}

You can refine your search by specifying following parameters inside Geo.SearchForCoordinatesOptions

maxResults - to limit the maximum result set (defaults to 50)

1let options = Geo.SearchForCoordinatesOptions(maxResults: 25)

Work with maps

Configure a geofence collection