Understanding SwiftUI Observation

In Chapter 2, we discussed SwiftData, an essential framework for our data management. However, for data management to be effective, we need something on the other side that can observe changes and display them for the user.

SwiftUI contains tools that allow us to observe these changes effectively and bind them to actions and UI updates. However, these tools have become complex and confusing over the years.

Now, we’re about to explore how observation has become significantly more straightforward, all while delving into the heart of SwiftUI’s data flow.

In this chapter, we will cover the following topics:

• Go over the SwiftUI observation system and discuss its problems
• Add the @Observable macro and learn how it works
• Discuss observing properties, including computed variables
• Work with environment variables and adapt them to the new framework
• Talk about the new @Bindable property wrapper
• Learn how to migrate...