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SwiftData

SwiftData makes it easy to persist data using declarative code. You can query and filter data using regular Swift code. And it’s designed to integrate seamlessly with SwiftUI.

Create models with Swift

Model your data using regular Swift types with @Model , with no additional files or tools to manage. SwiftData can automatically infer many relationships and you can use clear declarations like @Attribute(.unique) to describe constraints. Like SwiftUI, the source of truth is in your code. 

@Model

class
 Recipe
 {
	
@Attribute
(.
unique
) 
var
 name
: 
String

	var
 summary
: 
String
?
	
var
 ingredients
: [Ingredient]
}

Automatic persistence

SwiftData builds a custom schema using your models and maps their fields efficiently to the underlying storage. Objects managed by SwiftData are fetched from the database when needed and automatically saved at the right moment, with no additional work on your part. You can also take full control using the ModelContext API.

Integrates with SwiftUI

Use @Query in your SwiftUI views to fetch data. SwiftData and SwiftUI work together to provide live updates to your views when the underlying data changes, with no need to manually refresh the results. 

@Query
 var
 recipes
: [Recipe]
var
 body
: 
some
 View
 {
	
List
(
recipes
) { recipe 
in

		NavigationLink
(recipe.
name
, 
destination
: 
RecipeView
(recipe))
	}
}

Swift-native predicates

Query and filter your data using expressions that are type-checked by the compiler so you can catch typos and mistakes during development. Predicates provide compile-time errors when your expressions can’t be mapped to the underlying storage engine. 

let
 simpleFood
 = #Predicate<
Recipe
> { recipe 
in

	recipe.
ingredients
.
count
 < 
3

}

CloudKit syncing

Your data can be stored in files using DocumentGroup and synced via iCloud Drive, or you can use CloudKit to sync data between devices.

Compatible with Core Data

SwiftData uses the proven storage architecture of Core Data, so you can use both in the same app with the same underlying storage. When you’re ready, Xcode can convert your Core Data models into classes for use with SwiftData.

Videos