A Boolean value that indicates whether the window's constraint-based content determines its size.
- iOS 13.0+
- Mac Catalyst 13.0+
- tvOS 13.0+
The default value of this property is
false, which causes the window to maintain a fixed size. Setting this property to
true allows the system to perform constraints-based window sizing, which updates the window's size to match the space needed by its content. Window-size changes occur only when the app runs on macOS.