preferredThicknessFraction
The preferred thickness of the split view item relative to the split view.
Declaration
var preferredThicknessFraction: CGFloat { get set }Discussion
This value represents the proportion of the split view that you want the split view item to occupy on a scale of 0.0 to 1.0. The system uses this value to adjust the thickness of the item in relation to other items when a user double-clicks a neighboring divider, and when the app enters full-screen mode.
The default value of this property is unspecifiedDimension, which means the item doesn’t resize when a user double-clicks the divider, and the system preserves the absolute size when the app enters full-screen mode.