The next step is to add an IBSegueAction to the segue that will load the SwiftUI view into the hosting controller when the button is clicked. Within Xcode, select the Editor -> Assistant menu option to display the Assistant Editor panel. When the Assistant Editor panel appears, make sure that it is displaying the content of the ViewController.swift file. By default, the Assistant Editor will be in Automatic mode, whereby it automatically attempts to display the correct source file based on the currently selected item in Interface Builder. If the correct file is not displayed, the toolbar along the top of the editor panel can be used to select the correct file.
If the ViewController.swift file is not loaded, begin by clicking on the Automatic entry in the editor toolbar as highlighted in Figure 34-7:
From the resulting menu (Figure 34-8), select the ViewController.swift file to load it into the editor:
Next, Ctrl-click on the...