What you learned

Hopefully you felt like these projects started to stretch you a little, not only in pushing your SwiftUI skills further but also teaching you some more advanced Swift. Plus, of course, you also have two new SwiftUI projects that you built – you can go ahead and keep customizing these all you want, put them on GitHub, or perhaps convert them into something else that better suits your tastes.

Here’s a quick recap of all the new things we covered in the last three projects:

• Why @State works with structs.
• How to use @Observable to store data in classes.
• Presenting and dismissing views using the sheet() modifier and the dismiss environment key.
• Using onDelete(perform:) to enable swipe to delete.
• Adding EditButton to navigation bar items, to let users edit list data more easily.
• Reading and writing data with UserDefaults.
• Archiving and unarchiving data with Codable, including working with data stored in a hierarchy.
• Using the Identifiable protocol to make sure all items can be identified uniquely in our user interface.
• How to use containerRelativeFrame() to make content fit the screen.
• Using ScrollView to lay out custom views in a scrollable area.
• Using Swift’s generics system to write methods that work with different kinds of data.
• Pushing new views onto the navigation stack using NavigationLink.
• Navigating programmatically, including with the type-erased NavigationPath.
• How to customize the navigation bar appearance.
• Placing toolbar items in exact locations.

I hope you’ll agree that’s a lot, and it also spans a wide range – we’ve gone from hard-core language features through to user-facing views, with a huge spread in between. Some folks will prefer the pure language stuff and others will prefer the more creative side of coding, and that’s OK – we all learn differently!

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