SOLVED: Project 10, Part 1 - iTunes API returns no content! – 100 Days of SwiftUI

@theRansoms HWS+

Jan '24

My code runs and compiles but it doe snot display any content... Any pointers on where to start fault finding The fact that I do not see any content would be much appreciated.

          import SwiftUI

          struct Response: Codable {
              var results: [Result]
          }

          struct Result: Codable {
              var trackID: Int
              var trackName: String
              var collectionName: String
          }

          struct iTunesAPIView: View {
              @State private var results = [Result]()

              var body: some View {
                  List(results, id: \.trackID) { item in
                      VStack(alignment: .leading) {
                          Text(item.trackName)
                              .font(.headline)

                          Text(item.collectionName)
                      }
                  }
                  .task {
                      await loadData()
                  }
              }

              func loadData() async {
                  guard let url = URL(string: "https://itunes.apple.com/serach?term=taylor+swift$identity=song") else {
                      print("Invalid URL")
                      return
                  }

                  do {
                      let (data, _) = try await URLSession.shared.data(from: url)

                      if let decodedResponse = try? JSONDecoder().decode(Response.self, from: data)
                      {
                          results = decodedResponse.results
                      }
                  } catch {
                      print("Invalid Data")
                  }
              }
          }

2

@ygeras

Jan '24

Check you URL address it is misspelled... In project it is search not serach and entity not identity

URL(string: "https://itunes.apple.com/search?term=taylor+swift&entity=song")

3

@theRansoms HWS+

Jan '24

https://www.hackingwithswift.com/forums/100-days-of-swiftui/project-10-part-1-itunes-api-returns-no-content/25546/25547

That's what happens when you decide to start coding when you are 58!

:)

2

@theRansoms HWS+

Jan '24

Unfortunately, even after correct my two spelling mistakes, still no joy...

import SwiftUI

struct Response: Codable { var results: [Result] }

struct Result: Codable { var trackID: Int var trackName: String var collectionName: String }

struct iTunesAPIView: View { @State private var results = [Result]()

var body: some View {
    List(results, id: \.trackID) { item in
        VStack(alignment: .leading) {
            Text(item.trackName)
                .font(.headline)
            Text(item.collectionName)
        }
    }
    .task {
        await loadData()
    }
}

func loadData() async {
    guard let url = URL(string:
        "https://itunes.apple.com/search?term=taylor+swift&entity=song") else {
        print("Invalid URL")
        return
    }

    do {
        let (data, _) = try await URLSession.shared.data(from: url)

        if let decodedResponse = try? JSONDecoder().decode(Response.self, from: data) {
            results = decodedResponse.results
        }
    } catch {
        print("Invalid Data")
    }
}

}

2

@ygeras

Jan '24

You have to pay attention to data you receive from server. If you go over the lesson again you might notice that

struct Result: Codable {
              var trackId: Int // <-- trackId is spelled this way BUT not trackID
              var trackName: String
              var collectionName: String
          }

you can change it of course but then you have to help Swift to update CodingKeys to decode response. Not sure which lesson covers that. But if you want it to work from the box you HAVE to make sure your property names match those you receive from server.

OR to use CodingKeys like so

struct Result: Codable { 
    var trackID: Int
    var trackName: String
    var collectionName: String

    enum CodingKeys: String, CodingKey {
        case trackID = "trackId"
        case trackName
        case collectionName
    }
}

3

@theRansoms HWS+

Jan '24

Thank you, thank you, thank you.

You have taught me that every lower/upper case matters!

It all works now, thank you!

2

	@theRansoms HWS+ Jan '24 My code runs and compiles but it doe snot display any content... Any pointers on where to start fault finding The fact that I do not see any content would be much appreciated. import SwiftUI struct Response: Codable { var results: [Result] } struct Result: Codable { var trackID: Int var trackName: String var collectionName: String } struct iTunesAPIView: View { @State private var results = [Result]() var body: some View { List(results, id: \.trackID) { item in VStack(alignment: .leading) { Text(item.trackName) .font(.headline) Text(item.collectionName) } } .task { await loadData() } } func loadData() async { guard let url = URL(string: "https://itunes.apple.com/serach?term=taylor+swift$identity=song") else { print("Invalid URL") return } do { let (data, _) = try await URLSession.shared.data(from: url) if let decodedResponse = try? JSONDecoder().decode(Response.self, from: data) { results = decodedResponse.results } } catch { print("Invalid Data") } } } 2
	@ygeras Jan '24 Check you URL address it is misspelled... In project it is `search` not `serach` and `entity` not `identity` `URL(string: "https://itunes.apple.com/search?term=taylor+swift&entity=song")` 3
	@theRansoms HWS+ Jan '24 https://www.hackingwithswift.com/forums/100-days-of-swiftui/project-10-part-1-itunes-api-returns-no-content/25546/25547 That's what happens when you decide to start coding when you are 58! :) 2
	@theRansoms HWS+ Jan '24 Unfortunately, even after correct my two spelling mistakes, still no joy... import SwiftUI struct Response: Codable { var results: [Result] } struct Result: Codable { var trackID: Int var trackName: String var collectionName: String } struct iTunesAPIView: View { @State private var results = [Result]() var body: some View { List(results, id: \.trackID) { item in VStack(alignment: .leading) { Text(item.trackName) .font(.headline) Text(item.collectionName) } } .task { await loadData() } } func loadData() async { guard let url = URL(string: "https://itunes.apple.com/search?term=taylor+swift&entity=song") else { print("Invalid URL") return } do { let (data, _) = try await URLSession.shared.data(from: url) if let decodedResponse = try? JSONDecoder().decode(Response.self, from: data) { results = decodedResponse.results } } catch { print("Invalid Data") } } } 2
	@ygeras Jan '24 You have to pay attention to data you receive from server. If you go over the lesson again you might notice that `struct Result: Codable { var trackId: Int // <-- trackId is spelled this way BUT not trackID var trackName: String var collectionName: String }` you can change it of course but then you have to help Swift to update CodingKeys to decode response. Not sure which lesson covers that. But if you want it to work from the box you HAVE to make sure your property names match those you receive from server. OR to use CodingKeys like so `struct Result: Codable { var trackID: Int var trackName: String var collectionName: String enum CodingKeys: String, CodingKey { case trackID = "trackId" case trackName case collectionName } }` 3
	@theRansoms HWS+ Jan '24 Thank you, thank you, thank you. You have taught me that every lower/upper case matters! It all works now, thank you! 2

SOLVED: Project 10, Part 1 - iTunes API returns no content!

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