Webからtext取得

Alamofire を使う

swift

AF.request(urlString).responseString(encoding: .utf8) { response in
  ..
}

キャッシュなしの場合

swift

let req = URLRequest(
 url: URL(string: urlString)!,
 cachePolicy: .reloadIgnoringLocalAndRemoteCacheData
)
AF.request(req).responseString(encoding: .utf8) { response in
  ..
}