import UIKit
import SafariServices

class MainViewController: UIViewController {
    @IBOutlet weak var urlTextField: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    @IBAction func startBrowser(_ sender: Any) {
        if let url = self.urlTextField.text {
        let sfViewController = SFSafariViewController(url: NSURL(string: url)! as URL)
        self.present(sfViewController, animated: true, completion: nil)
        }
        print ("Now browsing in SFSafariViewController")
    }
}