swiftui에서의 검색

계산 속성을 이용하여 나타낸다.

 

filteredStation을 계산속성으로 나타내고, 그 목록을 나타냄. 

조건절로 거른다. 

 

var filteredStations: [SubwayStation] {
        if searchText.isEmpty {
            return stations
        } else {
            let initials = KoreanTextConverter.getInitials(from: searchText)
            return stations.filter { station in
                let stationInitials = KoreanTextConverter.getInitials(from: station.name)
                return stationInitials.contains(initials)
            }
        }
    }

 

 

List(filteredStations) { station in
                Text(station.name)
            }

이 부분에서 filteredStation를 이용해 검색 결과를 나타낸다. 

//
//  ContentView.swift
//  searchapp
//
//  Created by Lyla on 2024/02/17.
//

import SwiftUI

struct ContentView: View {
    @State private var searchText = ""
    @State private var stations = [
        SubwayStation(name: "강남"),
        SubwayStation(name: "역삼"),
        SubwayStation(name: "삼성"),
        SubwayStation(name: "선릉"),
        SubwayStation(name: "잠실"),
        SubwayStation(name: "건대입구"),
        SubwayStation(name: "왕십리")
    ]
    
    var filteredStations: [SubwayStation] {
        if searchText.isEmpty {
            return stations
        } else {
            let initials = KoreanTextConverter.getInitials(from: searchText)
            return stations.filter { station in
                let stationInitials = KoreanTextConverter.getInitials(from: station.name)
                return stationInitials.contains(initials)
            }
        }
    }
    
    var body: some View {
        VStack {
            TextField("지하철 역 검색", text: $searchText)
                .textFieldStyle(RoundedBorderTextFieldStyle())
                .padding()
            
            List(filteredStations) { station in
                Text(station.name)
            }
            .listStyle(InsetGroupedListStyle())
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

struct KoreanTextConverter {
    static func getInitials(from text: String) -> String {
        let koreanText = NSMutableString(string: text) as CFMutableString
        CFStringTransform(koreanText, nil, kCFStringTransformToLatin, false)
        CFStringTransform(koreanText, nil, kCFStringTransformStripCombiningMarks, false)
        return koreanText as String
    }
}

#Preview {
    ContentView()
}