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.

Related docs：

• https://developer.apple.com/xcode/swiftdata/
• https://developer.apple.com/documentation/swiftdata

Preserving #

Model #

@Model

import SwiftData

@Model
class Trip {
    var name: String
    var destination: String
    var startDate: Date
    var endDate: Date
    var accommodation: Accommodation?
}

Customize persistence behavior #

@Attribute

@Attribute(.unique) var name: String

@Relationship

@Relationship(.cascade) var accommodation: Accommodation?

@Transient

temporary data that doesn’t need saving.

@Transient var destinationWeather = Weather.current()

Configure Container #

ModelContainer

ModelConfiguration

Save Model for later use #

ModelContext

import SwiftUI
import SwiftData

struct ContentView: View {
    @Environment(\.modelContext) private var context
}

Query to display #

@Query

FetchDescriptor

Syncing #

Building #

Adding #

Adopting #