MapSelection of MapFeatures and MKMapItems

Question

dougholland OP

Created 2w

Replies 1

Boosts 0

Participants 2

I have a Map within a SwiftUI app that has the selection parameter set to an optional MapSelection<MKMapItem>.

I need to be able to select MapFeatures which works as expected as well as MKMapItems which are added to the map. The MKMapItems are not selectable.

Is it possible to make it such that the Map allows the user to select MKMapItems as well as MapFeatures?

Answered by intrepidreality in 814515022

I'm the original post author, replying from my work account.

Here is an example that allows for selection of MapFeatures and MKMapItems. It shows Apple Stores nearby and allows those search results (MKMapItems) to be selected, as well as the MapFeatures to be selected.

The key thing that I was missing before was the the need for the .tag modifier on the Marker. This example shows how to achieve selection of MapFeatures and MKMapItems.

import SwiftUI

import MapKit

struct ContentView: View {
    @State var position: MapCameraPosition = .automatic
    
    @State var selection: MapSelection<MKMapItem>?
    
    @State private var items: [MKMapItem] = []
    
    var body: some View {
        VStack {
            Map(position: $position, selection: $selection) {
                ForEach(items, id: \.self) { item in
                    Marker(item: item)
                        .tag(MapSelection(item))
                }
            }
        }.onAppear {
            Task {
                try? await search(for: "Apple Store")
            }
        }
    }
    
    func search(for query: String) async throws {
        let request = MKLocalSearch.Request()
        
        request.naturalLanguageQuery = query
        
        request.resultTypes = [.pointOfInterest, .address]
        
        Task {
            let search = MKLocalSearch(request: request)
            
            let response = try? await search.start()
            
            items = response?.mapItems ?? []
        }
    }
}

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Answer 1

intrepidreality OP

5d

Accepted Answer

I'm the original post author, replying from my work account.

Here is an example that allows for selection of MapFeatures and MKMapItems. It shows Apple Stores nearby and allows those search results (MKMapItems) to be selected, as well as the MapFeatures to be selected.

The key thing that I was missing before was the the need for the .tag modifier on the Marker. This example shows how to achieve selection of MapFeatures and MKMapItems.

import SwiftUI

import MapKit

struct ContentView: View {
    @State var position: MapCameraPosition = .automatic
    
    @State var selection: MapSelection<MKMapItem>?
    
    @State private var items: [MKMapItem] = []
    
    var body: some View {
        VStack {
            Map(position: $position, selection: $selection) {
                ForEach(items, id: \.self) { item in
                    Marker(item: item)
                        .tag(MapSelection(item))
                }
            }
        }.onAppear {
            Task {
                try? await search(for: "Apple Store")
            }
        }
    }
    
    func search(for query: String) async throws {
        let request = MKLocalSearch.Request()
        
        request.naturalLanguageQuery = query
        
        request.resultTypes = [.pointOfInterest, .address]
        
        Task {
            let search = MKLocalSearch(request: request)
            
            let response = try? await search.start()
            
            items = response?.mapItems ?? []
        }
    }
}

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