What's the difference between different String format of MusicItemID?

Question

vitaliyfromternopol OP

Created Aug ’22

Replies 1

Boosts 0

Participants 2

What's the difference between MusicItemID("1603171516") and MusicItemID("i.KoJeg8VCZLNZZq")?

Because when fetching [Track] of the Album when to chose

let id = MusicItemID("i.KoJeg8VCZLNZZq")

var request = MusicCatalogResourceRequest<Album>(matching: \.id, equalTo: id)
request.properties = [.tracks]
let response = try await request.response()
guard let tracks = response.items.first?.tracks else { return }
albumTracks = tracks

It returns error ⬇️

Screenshot 2022-08-15 at 18.06.11.png

Boost

Answer 1

snuff4 OP

Aug ’22

Accepted Answer

MusicItemID("1603171516") is an identifier from the Apple Music catalog, whereas the other one MusicItemID("i.KoJeg8VCZLNZZq") is an identifier from your music library. So, when you use a catalog request for a user library track, it will give an error.

You can use the Apple Music API and MusicDataRequest to overcome this:

 guard let url = URL(string: "https://api.music.apple.com/v1/me/library/albums/i.KoJeg8VCZLNZZq/tracks") else { return }

  let request = MusicDataRequest(urlRequest: .init(url: url))
  let response = try await request.response()

  let tracks = try JSONDecoder().decode(MusicItemCollection<Track>.self, from: response.data)

Or, you can use the new structure MusicLibraryRequest introduced in iOS 16:

var request = MusicLibraryRequest<Album>()

  request.filter(matching: \.id, equalTo: "i.KoJeg8VCZLNZZq")
  let response = try await request.response()

3