How can I persist my SwiftUI navigation state across app launches

Asked on 09/06/2024

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To persist your SwiftUI navigation state across app launches, you can leverage the capabilities of SwiftData, which is designed to handle persistence, modeling, and migration of your app's data. SwiftData allows you to define your app's model layer and persist it across launches, making it easier to maintain the state of your app, including navigation state.

Here's a brief overview of how you can use SwiftData for persistence:

  1. Define Your Models: Use SwiftData to define your app's models. You can decorate each model with the @Model macro to make it part of the SwiftData framework.

  2. Model Container: Use the modelContainer modifier on your WindowGroup to inform the view hierarchy about your models. This setup allows your views to query and update the model data seamlessly.

  3. Persisting State: By using SwiftData, you can persist the state of your models, which can include navigation-related data. This persistence ensures that when your app is relaunched, it can restore the navigation state based on the saved model data.

For more detailed guidance, you might want to explore the session titled "What’s new in SwiftData" from WWDC 2024, which covers how to adopt SwiftData in your app. You can start with the chapter on adopting SwiftData:

This session will provide you with insights into how to integrate SwiftData into your app and leverage it for persisting navigation state and other data.

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