UIKit to SwiftUI Migration Guide Specialist

Migrating Legacy UIKit to SwiftUI Without Halting Feature Delivery

How to refactor legacy Storyboards and UIKit view controllers to modern SwiftUI iteratively while maintaining continuous App Store updates.

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The Fear of Massive Code Rewrites

Attempting a total app rewrite and getting stuck in feature-parity limbo for months.

Legacy Storyboard merge conflicts breaking team Git workflows.

Mixing UIKit and SwiftUI causing navigation and layout bugs.

Loss of developer velocity.

The Progressive Migration Strategy

Using `UIHostingController` to embed new SwiftUI views seamlessly inside legacy UIKit view controllers.

Using `UIViewRepresentable` to bridge complex legacy UIKit controls into new SwiftUI screens.

Refactoring shared data layers to Swift Concurrency & Observation first.

Deleting legacy Storyboards screen by screen.

Frequently Asked Questions

Q: Can UIKit and SwiftUI coexist in the same iOS app?
Yes! Apple designed `UIHostingController` and `UIViewRepresentable` specifically for seamless interop.
Q: Should we migrate data models first or UI screens first?
Migrate business logic and data models to Swift Concurrency first, then build SwiftUI screens on top.

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