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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
Posted by Rea Rahhal
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()
}