Instance Method

copy(alpha:)

Creates a copy of an existing color, substituting a new alpha value.

Declaration

func copy(alpha: CGFloat) -> CGColor?

Parameters

color: The color to copy.
alpha: A value that specifies the desired opacity of the copy. Values outside the range [0,1] are clamped to 0 or 1.

Return Value

A copy of the specified color, using the specified alpha value. You are responsible for releasing this object using CGColorRelease.

See Also

Creating Colors

func copy() -> CGColor?

Creates a copy of an existing color.

init(genericCMYKCyan: CGFloat, magenta: CGFloat, yellow: CGFloat, black: CGFloat, alpha: CGFloat)

Creates a color in the Generic CMYK color space.

init(gray: CGFloat, alpha: CGFloat)

Creates a color in the Generic gray color space.

init(genericGrayGamma2_2Gray: CGFloat, alpha: CGFloat)

Creates a color in the Generic gray color space with a gamma ramp of 2.2.

init(red: CGFloat, green: CGFloat, blue: CGFloat, alpha: CGFloat)

Creates a color in the Generic RGB color space.

init(srgbRed: CGFloat, green: CGFloat, blue: CGFloat, alpha: CGFloat)

Creates a color in the sRGB color space.

init?(colorSpace: CGColorSpace, components: UnsafePointer<CGFloat>)

Creates a color using a list of intensity values (including alpha) and an associated color space.

init?(patternSpace: CGColorSpace, pattern: CGPattern, components: UnsafePointer<CGFloat>)

Creates a color using a list of intensity values (including alpha), a pattern color space, and a pattern.