Function

SecTransformGetAttribute(_:_:)

Gets the current value of a transform attribute.

Declaration

func SecTransformGetAttribute(_ transformRef: SecTransform, _ key: CFString) -> CFTypeRef?

Parameters

transformRef

The transform whose attribute value will be retrieved.

key

The name of the attribute to retrieve. See Transform Attributes for a list of valid keys.

Return Value

The value of an attribute. If this attribute is being set as the output of another transform and SecTransformExecute(_:_:) has not been called on the transform or if the attribute does not exists then NULL will be returned.

Discussion

This may be called after SecTransformExecute(_:_:).

See Also