Safariで開く

【Swift】Table View Cell、外部URLへ飛ぶ方法 - Qiita

  var url: String!

  @IBAction func tapSafari(_ sender: Any) {

    let url2 = NSURL(string: url)

    if UIApplication.shared.canOpenURL(url2 as! URL) {

      UIApplication.shared.open(url2! as URL, options: [:], completionHandler: nil)

    }

  }