Constants indicating which scale variant of a symbol image to use.
- iOS 13.0+
- Mac Catalyst 13.0+
- tvOS 13.0+
- watchOS 6.0+
The definition of a symbol image includes multiple scale and weight variants. Scale variants offer a way to define the size of the image relative to layout guides in the symbol image's definition file. The system chooses the appropriate size variant based on the available space and configuration options.