Returns the type used by a CFNumber object to store its value.
- iOS 2.0+
- macOS 10.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
- Core Foundation
The CFNumber object to examine.
A constant that indicates the data type of the value contained in
CFNumber for a list of possible values.
The type specified in the call to
CFNumber is not necessarily preserved when a new CFNumber object is created—it uses whatever internal storage type the creation function deems appropriate.