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iOS Build An iTunes Search App Requesting Real Data Searching For Artists

Rea Rahhal
PLUS
Rea Rahhal
Courses Plus Student 4,732 Points

app crashes when I type an artist name

func searchForArtists(wihTerm term:String,completion: @escaping ([Artist],ItunesError?) -> Void){

    let endpoint = Itunes.search(term: term, media: .music(entity:.musicArtist,attribute:.artistTerm))

    let task = downloader.jsonTask(with: endpoint.request){ json,error in

        DispatchQueue.main.async {

            guard let json = json else{
                completion([], error)
                return//to exit current scope
            }

            guard let results = json["results"] as?  [[String:Any]] else{
                completion([],.jsonParsingFailure(message:"JSON Data does not contain results"))

                return
            }

            let artists = results.flatMap{Artist(json: $0)}//flat map is used to flatten nested arrays

            completion(artists,nil)
        }
    }
    task.resume()
}