Returns the unique type identifier of an image destination opaque type.
- iOS 4.0+
- macOS 10.4+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
- Image I/O
Returns the Core Foundation type ID for an image destination.
A type identifier is an integer that identifies the opaque type to which a Core Foundation object belongs. You use type IDs in various contexts, such as when you are operating on heterogeneous collections.