Xcode 17.3 introduces AI-assisted Interface Builder and storyboard refactor tools

AI · 4 min read

Xcode 17.3 integrates an on-device AI assistant into Interface Builder that recommends layout variants, suggests accessibility label improvements, and can propose code-ready Auto Layout constraints. The assistant runs locally to preserve IP and can generate multiple design alternatives for different device families and dynamic type sizes.

A new storyboard refactor tool helps teams break large storyboards into modular components and automatically updates segues and constraints. The tool includes a preview diff mode so teams can review changes before applying them, which should reduce merge conflicts on large teams.

Apple emphasizes that AI suggestions remain optional and that generated code is fully editable; the company has added audit logs to track when and how AI-made changes are introduced. Early adopters report quicker iteration cycles paired with care to validate accessibility and performance implications of suggested layouts.