how do I use swift data
Generated on 3/20/2025
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To use Swift Data, you can follow these steps based on the information presented at WWDC:
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Import the Framework: Start by importing the Swift Data framework into your project.
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Define Your Models: Use the
@Modelmacro to define your data models. This macro is the core of Swift Data, allowing you to specify the schema for your app's data. -
Model Container: Use the
modelContainermodifier on your app'sWindowGroupto inform the view hierarchy about your models. This setup allows your views to query and display data from the model container. -
Custom Data Stores: Swift Data allows you to use custom data stores. You can configure your model container to use a custom backend, such as JSON files or a remote web service, by swapping out the default configuration with your custom data store.
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Querying Data: Use the
querymacro to fetch data from the model container. You can optimize queries with complex filters and the newindexmacro to improve performance. -
Track Changes: Swift Data provides a history API to track changes in your data, which is useful for syncing with remote services or updating UI elements based on data changes.
For a detailed walkthrough, you can refer to the session What’s new in SwiftData (00:00:57) which covers adopting Swift Data, customizing schemas, and more. Additionally, the session Track model changes with SwiftData history (00:00:45) provides insights into using the history API to track data changes.
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