Swift XML 파싱

공공데이터 포털의 경우 XML 데이터 포맷이 많아서 기록을 남깁니다. :)

예제 오픈 API: https://www.data.go.kr/tcs/dss/selectApiDataDetailView.do?publicDataPk=15101914#/layer-api-guide 

한국관광공사_관광사진 정보_GW

 

 

*** +해야 할 것들 ***

Info.plist 에서 App Transport Security Settings -> Allow Arbitrary Loads 를 'YES' 로 해주셔야합니다. :)

API_KEY 숨기는 방법 -> https://trashblog.tistory.com/112

 

예제코드

//
//  TourImageAPI.swift
//  TourApp
//
//  Created by Byeon jinha on 2023/05/02.
//

import Foundation

class TourImageAPI: NSObject, ObservableObject {
    
    static let shared = TourImageAPI()

    @Published var items: [TourImage] = []
    private var currentElement: String = ""
    private var currentItem: TourImage?
    private let auth = Bundle.main.infoDictionary?["API_KEY_E"] as? String

    func getMyIP(pageNum: Int) {
        // Generate URL and query parameters
        let urlString =   "https://apis.data.go.kr/B551011/PhotoGalleryService1/galleryList1?numOfRows=5&pageNo=\(pageNum)&MobileOS=iOS&MobileApp=TourApp&serviceKey=\(auth!)"
        let urlComponents = URLComponents(string: urlString)
        let url = urlComponents?.url
        var request = URLRequest(url: url!)
        request.addValue("application/xml", forHTTPHeaderField: "Accept")

        // request data asynchronously using URLSession
        let task = URLSession.shared.dataTask(with: request) { data, response, error in
            guard let data = data else {
                print("Error: No data")
                return
            }
            // Parse XML data
            let parser = XMLParser(data: data)
            parser.delegate = self
            if parser.parse() {
                print("Parsing succeeded")
            } else {
                print("Parsing failed")
            }
        }
        task.resume()
    }
}

extension TourImageAPI: XMLParserDelegate {
    func parserDidStartDocument(_ parser: XMLParser) {
        print("Parsing started")
    }
    
    func parserDidEndDocument(_ parser: XMLParser) {
        print("Parsing ended")
    }
    
    func parser(_ parser: XMLParser, foundCharacters string: String) {
        switch currentElement {
        case "galContentId":
            currentItem?.galContentId = string
        case "galContentTypeId":
            currentItem?.galContentTypeId = string
        case "galTitle":
            currentItem?.galTitle = string
        case "galWebImageUrl":
            currentItem?.galWebImageUrl = string
        case "galCreatedtime":
            currentItem?.galCreatedtime = string
        case "galModifiedtime":
            currentItem?.galModifiedtime = string
        case "galPhotographyMonth":
            currentItem?.galPhotographyMonth = string
        case "galPhotographyLocation":
            currentItem?.galPhotographyLocation = string
        case "galPhotographer":
            currentItem?.galPhotographer = string
        case "galSearchKeyword":
            currentItem?.galSearchKeyword = string
        default:
            break
        }
    }
    
    func parser(_ parser: XMLParser, didStartElement elementName: String, namespaceURI: String?, qualifiedName qName: String?, attributes attributeDict: [String : String] = [:]) {
        currentElement = elementName
        if elementName == "item" {
            currentItem = TourImage()
        }
    }
    
    func parser(_ parser: XMLParser, didEndElement elementName: String, namespaceURI: String?, qualifiedName qName: String?) {
        if elementName == "item" {
            if let currentItem = currentItem {
                DispatchQueue.main.async { [self] in
                    items.append(currentItem)
                }
            }
            currentItem = nil
        }
        currentElement = ""
    }
}

class TourImage: Identifiable {
    var galContentId: String?
    var galContentTypeId: String?
    var galTitle: String?
    var galWebImageUrl: String?
    var galCreatedtime: String?
    var galModifiedtime: String?
    var galPhotographyMonth: String?
    var galPhotographyLocation: String?
    var galPhotographer: String?
    var galSearchKeyword: String?
    
    init() {}
}