textfieldReturn.swift

 //  creating a function to enable our textField to load the webView with new requests and this function used specifically to use search key as a search button..

    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        let url = URL(string: textField.text!)  // assigning textField value to url
        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
    }