Dynamic Type Text Scaling Bugs in SwiftUI: The Fix

SwiftUI text clipping or truncating when users scale their font size? The short answer: Dynamic Type lets users resize text, and fixed-size layouts break when they do. The fix is not to fight scaling but to design for it, removing fixed frames, allowing wrapping, and scaling spacing along with the text. Build from a free VP0 design, the free iOS design library for AI builders, with Dynamic Type in mind, and verify at the largest sizes. Designing for scaling is the whole fix. The stakes are real: about 16% of the world, 1.3 billion people, live with a significant disability.

Who this is for

This is for SwiftUI developers whose text looks fine at the default size but clips, truncates, or overflows when a user increases their text size, and who want it to scale gracefully.

Why Dynamic Type breaks layouts

Dynamic Type is an accessibility feature: users set a preferred text size, and apps should respect it. Bugs appear when a layout assumes the default size, a fixed-height row, a fixed frame around a label, an icon and text locked to one size, so when the text grows, it has nowhere to go and clips or truncates. The fix is to let things grow: use the system text styles, avoid fixed heights around text, allow wrapping, and scale related metrics with the text. The Apple typography guidance covers Dynamic Type, ScaledMetric scales values with it, and the accessibility guidance covers testing.

Symptom	Cause	Fix
Text clipped	Fixed-height container	Remove the fixed height
Truncated label	No wrapping allowed	Allow multiline
Icon and text misalign	Fixed icon size	Scale with ScaledMetric
Cramped at large sizes	Fixed spacing	Scale spacing too
Looks fine by default only	Not tested at large sizes	Test the extremes

Build it free with a VP0 design

Design for scaling from the start. Build from a VP0 reference and prompt for Dynamic Type support:

Build this SwiftUI screen from the VP0 design at [paste VP0 link] with full Dynamic Type support: use system text styles, no fixed heights around text, allow multiline wrapping, and use ScaledMetric for spacing and icon sizes that should grow with the text. Match the layout and spacing from the reference, and generate clean code.

For related layout and accessibility workflows, see does Lovable handle iPhone and iPad screen sizes, why FlutterFlow layouts break in Xcode and how to fix them, prompting Claude for strict iOS spacing with tokens, and how to make an AI app look native on iOS.

Test at the extremes

Most Dynamic Type bugs are invisible at the default size and only show at the largest accessibility settings, so that is exactly where to test. Use the accessibility text size controls or Xcode preview overrides to view each screen at the biggest sizes, and fix what breaks: remove fixed heights, allow wrapping, and scale spacing and icons with ScaledMetric. AI builders often emit fixed sizes by default, so prompt for Dynamic Type explicitly and verify the output. A layout that holds up at the largest text size is both accessible and robust, and it is a common App Store and usability expectation.

Common mistakes

The first mistake is testing only at the default text size. The second is fixed-height containers around text. The third is disallowing multiline wrapping. The fourth is fixed spacing and icon sizes that do not scale. The fifth is fighting Dynamic Type instead of designing for it.

Key takeaways

• Dynamic Type text bugs come from fixed sizes that cannot grow with the user’s setting.
• Use system text styles, remove fixed heights, and allow wrapping.
• Scale spacing and icon sizes with ScaledMetric.
• Test at the largest accessibility sizes, where the bugs live.
• Build from a free VP0 reference with Dynamic Type in mind.

Frequently asked questions

Why does my SwiftUI text clip or truncate with Dynamic Type? The layout uses fixed sizes that cannot grow when text scales. Remove fixed frames, allow wrapping, scale spacing with ScaledMetric, and test at large sizes.

How do I support Dynamic Type properly in SwiftUI? Use system text styles, avoid fixed-height containers, allow wrapping, use ScaledMetric for related metrics, and test the full range of sizes.

What is ScaledMetric? A SwiftUI property wrapper that scales a value like spacing or an icon size with the user’s Dynamic Type setting, so layout grows with the text.

How do I test Dynamic Type? Use accessibility text size settings or Xcode preview overrides to view screens at the largest sizes, where most bugs appear.