Removing rows from a table view

As you have learned in Chapter 14, Getting Started with MVC and Table Views, table view row deletion is handled by the tableView(_:commit:forRowAt:) method, which is one of the methods declared in the UITableViewDataSource protocol.

You’ll implement this method in the JournalListViewController class. Follow these steps:

1. In the Project navigator, click the JournalListViewController file and add the following code to the JournalListViewController class after the existing table view data source methods:

   func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
     if editingStyle == .delete {
       journalEntries.remove(at: indexPath.row)
       tableView.reloadData()
     }
   }
   

This will allow you to swipe left to display a Delete button, and when you tap the Delete button, the corresponding JournalEntry instance will be removed from the journalEntries...