Context swift data

SwiftData is a framework introduced in iOS 17 that simplifies building your app's model layer and persisting it across launches. It provides features like persistence, modeling, schema migration, graph management, and synchronization with CloudKit. SwiftData allows you to define your schema using a lightweight API, utilizing modern Swift language features like macros.

Key features of SwiftData include:

1. Modeling and Persistence: You can easily model your app's data and persist it using SwiftData. The framework supports schema migration and synchronization with CloudKit.

2. Custom Data Stores: SwiftData allows you to use custom data stores, enabling you to store data using alternative backends like SQLite, remote web services, or JSON files. This flexibility is achieved through the new Datastore protocol, which supports any persistence backend.

3. Schema Customization: You can customize your model container and schema using new macros like the #Unique macro to avoid duplicate models and the #Index macro to optimize queries.

4. History API: SwiftData provides access to the history of changes in a datastore, making it easy to track local changes that need to be synced to a remote service.

5. Integration with SwiftUI: SwiftData integrates seamlessly with SwiftUI, allowing you to populate views using queries that fetch models from the model container.

For more detailed information, you can refer to the sessions "What’s new in SwiftData" and "Create a custom data store with SwiftData" from WWDC 2024.