Sent right before the layout manager invalidates layout due to the text container changing geometry.
- iOS 7.0+
- macOS 10.11+
- Mac Catalyst 13.0+Beta
- tvOS 9.0+
The layout manager invalidating layout.
The text container that changed geometry.
The size of the text container before it changed geometry.
The delegate can react to the geometry change and perform adjustments such as recreate an exclusion path.