Doubt Encoding Utf8 Swift 3

Question

I’m having a lot of problems with encoding my app. I have an online radio in the United States and I’m trying an app for it. I get the music from Lastfm.

let queryURL: String
    if useLastFM {
        queryURL = String(format: "http://ws.audioscrobbler.com/2.0/?method=track.getInfo&api_key=%@&artist=%@&track=%@&format=json", apiKey, track.artist, track.title)
    } else {

        queryURL = String(format: "https://itunes.apple.com/search?term=%@+%@&entity=song", track.artist, track.title)
    }

    let escapedURL = queryURL.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)

CENTOVA says it sends in UTF8, but I can not solve it.

When I use:

 @IBAction func testeS(_ sender: Any) {
    let musica = self.track.title
   print(musica)

}

I get Output like this for example:

Direção do vento Part César Menotti

I tried anyway, but I assume I don’t have complete mastery of SWIFT, I’m studying! Thanks to those who read/helped/collaborated with my question.

Answer 1

The encoding is passed on in transformations String <=> Data, for example:

let string = "Codificação"

// String => Data
let data = string.data(using: .utf8)
// 13 bytes <...>

// Data => String
String(data: data!, encoding: .utf8)
// "Codificação"

The method addingPercentEncoding(withAllowedCharacters:) transforms your String in valid text to URL:

string.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)
// "Codifica%C3%A7%C3%A3o"

The problem must be at the moment that the property track.title is assigned and as this text is coming in your app.