Function

CFNumberGetType(_:)

Returns the type used by a CFNumber object to store its value.

Declaration

func CFNumberGetType(_ number: CFNumber!) -> CFNumberType

Parameters

number

The CFNumber object to examine.

Return Value

A constant that indicates the data type of the value contained in number. See CFNumberType for a list of possible values.

Discussion

The type specified in the call to CFNumberCreate(_:_:_:) is not necessarily preserved when a new CFNumber object is created—it uses whatever internal storage type the creation function deems appropriate.

See Also

Getting Information About Numbers

func CFNumberGetByteSize(CFNumber!) -> CFIndex

Returns the number of bytes used by a CFNumber object to store its value.

func CFNumberGetValue(CFNumber!, CFNumberType, UnsafeMutableRawPointer!) -> Bool

Obtains the value of a CFNumber object cast to a specified type.

func CFNumberIsFloatType(CFNumber!) -> Bool

Determines whether a CFNumber object contains a value stored as one of the defined floating point types.

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

Learn more about using Apple's beta software