recommended from Apple Developer Documentation:
// rename ViewController to WebViewController
…
import UIKit
import WebKit
class ViewController: UIViewController, WKUIDelegate {
Can confirm that @rolfino 's Programmatic approach works, as long as you set up everything correctly in Interface Builder with the Tab Controller and new View Controller & you also create the new Swift file for the new view controller appropriately (and change the class name in the Identity Inspector - I used a different class name than @rolfino ). I also changed the Tab Bar Item Title. However, I did not add an icon like the ones that were provided for Convert & Map from the book resources.