attribute(forKey:)
Returns the value of a lighting attribute.
Declaration
func attribute(forKey key: String) -> Any?Parameters
- key:
A constant specifying a lighting attribute. See Lighting Attribute Keys for available keys and their possible values.
Return Value
The value of the lighting attribute, or nil if no such attribute exists.
Discussion
A light’s type property determines its set of available attributes.
You can also get the values of lighting attributes using Key-value coding. The key path for each lighting attribute is listed in Lighting Attribute Keys.