Trevor Whittingham • 1/14/2026

Stream Foundation Models Responses Into SwiftUI

This article explains how to stream responses from Apple's Foundation Models framework into SwiftUI, avoiding UI freezes by using the streaming API that returns an AsyncSequence of response snapshots. It covers defining a @Generable struct with property order for streaming, using DraftReply.PartiallyGenerated for incremental rendering, and building a production-ready view model with availability checks, cancellation, and error handling. The approach enables real-time display of structured output fields as they arrive, improving user experience in AI-powered apps.

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#Swift #Foundation Models #Swiftui