【Swift】MapKitを使用して場所のサジェストを受け取る

はじめに

MKLocalSearchCompleterを使用して場所の検索をローカルで行うことができるっぽいので試してみました。

サンプルアプリ

実装

import SwiftUI

struct ContentView: View {
    @StateObject private var viewState = ViewState()
    var body: some View {
        NavigationStack {
            List(viewState.localSearchCompletions, id: \.self) { localSearchCompletion in
                Text(localSearchCompletion.title)
            }
            .searchable(text: $viewState.searchText)
        }
    }
}

import MapKit
import Combine

public final class ViewState: NSObject, ObservableObject {
    @Published var searchText = ""
    
    @Published var localSearchCompletions: [MKLocalSearchCompletion] = []
    
    private let localSearchCompleter = MKLocalSearchCompleter()
    
    private var cancellable = Set<AnyCancellable>()
    
    public override init() {
        super.init()
        localSearchCompleter.delegate = self
        $searchText.sink {
            self.localSearchCompleter.queryFragment = $0
        }
        .store(in: &cancellable)
    }
}

extension ViewState: MKLocalSearchCompleterDelegate {
    public func completerDidUpdateResults(_ completer: MKLocalSearchCompleter) {
        self.localSearchCompletions = completer.results
    }
}

おわり

通信しなくていいのはめっちゃいいですね！