Introducing Swift Data Improvements

Swift Data was introduced in WWDC 2023 as part of iOS 17, and its goal was to replace the old but popular Core Data framework.

Swift Data provides a modern API based on Swift, which can help reduce friction when working with persistent stores. One of the trends we see in Apple development tools is moving away from GUI to code-based tools. A good example is SwiftUI – even though it is possible to drag and drop components to build a user interface, the primary way to do this is in code. The same goes for App Intents and Swift Package Managers. The data layer goes through the same concept – in Swift Data, we don’t have any data model editor, so we build our data model using only code.

For example, here’s how to create a data model for a Book entity:

@Model
class Book {
    var author: String
    var title: String
    var publishedDate: Date
}

At first...