Instance Method

colorWithAlphaComponent:

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

Declaration

- (UIColor *)colorWithAlphaComponent:(CGFloat)alpha;

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

+ colorWithCIColor:

Creates a color object that encapsulates a Core Image color.

- initWithCIColor:

Creates a color object that encapsulates a Core Image color.

+ colorWithCGColor:

Creates a color object using the specified Quartz color reference.

- initWithCGColor:

Creates a color object using the specified Quartz color reference.