Hands-On Server-Side Web Development with Swift

Creating the EditEntry segue

First of all, create a new segue by Ctrl + dragging from the table view component to the Navigation Controller. Name the segue EditEntry and specify the kind of attribute to be Show:

In the MainScreenViewController class, add the following code to the prepare(for segue: sender:) function to tell EntryDetailsViewController about the EditEntry segue:

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {    if segue.identifier == "NewEntry" {         let navigationController = segue.destination as! UINavigationController         let controller = navigationController.topViewController as! EntryDetailsViewController controller.delegate ...