17.17 Summary
When creating a new project, Xcode provides the option to use either UIKit Storyboards or SwiftUI as the basis of the user interface of the app. When in SwiftUI mode, most of the work involved in developing an app takes place in the code editor and the preview canvas. New views can be added to the user interface layout and configured either by typing into the code editor or dragging and dropping components from the Library either onto the editor or the preview canvas.
The preview canvas will usually update in real time to reflect code changes as they are typed into the code editor, though will frequently pause updates in response to larger changes. When in the paused state, clicking the Resume button will restart updates. The Attribute inspector allows the properties of a selected view to be changed and new modifiers added. Holding down the Command key while clicking on a view in the editor or canvas displays the context menu containing a range of options such as...
