Instance Method

withAlphaComponent(_:)

Creates a color object that has the same color space and component values as the receiver, but has the specified alpha component.

Declaration

func withAlphaComponent(_ alpha: CGFloat) -> UIColor

Parameters

alpha

The opacity value of the new color object, specified as a value from 0.0 to 1.0. Alpha values below 0.0 are interpreted as 0.0, and values above 1.0 are interpreted as 1.0

Return Value

The new UIColor object.

Discussion

A subclass with explicit opacity components should override this method to return a color with the specified alpha.

See Also

Creating a Color from Another Color Object

init(ciColor: CIColor)

Creates a color object that encapsulates a Core Image color.

init(cgColor: CGColor)

Creates a color object using the specified Quartz color reference.