Simple website in swift

Website.swift

//
//  ViewController.swift
//  myWebBrowser
//
//  Created by arabdevteam on 8/10/16.
//  Copyright © 2016 arabdevteam. All rights reserved.
//

import UIKit

class ViewController: UIViewController, UITextFieldDelegate, UIWebViewDelegate {

    @IBOutlet weak var textField: UITextField!
    @IBOutlet weak var myWeb: UIWebView!
    @IBOutlet weak var activityIndicator: UIActivityIndicatorView!

    override func viewDidLoad() {
        super.viewDidLoad()
        textField.delegate = self   //  UITextField Delegation
        myWeb.delegate = self   //  webView Delegation
        let url = URL(string: "https://twitter.com/arabdevteam")!
        let request = URLRequest(url: url)
        myWeb.loadRequest(request)
        textField.text = url.relativeString //  updating TextField with url string

    }

    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        let url = URL(string: "http://\(textField.text!)")  // assigning textField value to url & enable user to write url without the need to "http://"
        let request = URLRequest(url: url!)  //  making a request based on textField input text
        myWeb.loadRequest(request)  //  loading webView with the request
        textField.text = url?.relativeString    //  updating TextField with url string
        textField.resignFirstResponder()    //  keyboard dismissal upon clicking search key
        return true    //  search key as a search button
    }

    //  start animation when webView to load a request
    func webViewDidStartLoad(_ webView: UIWebView)  {
        activityIndicator.startAnimating()
    }

    //  stop animation when a webView has finished request loading
    func webViewDidFinishLoad(_ webView: UIWebView) {
        activityIndicator.stopAnimating()
    }
    //  stop animation when there is an error and webView is unable to load the request; such as no signal at all or server issue.. Note: you can figure a warning message in this function but we prefer not to use it for shortcut..
    func webView(_ webView: UIWebView, didFailLoadWithError error: NSError?)    {
        activityIndicator.stopAnimating()
    }

}