Contents

getRed(_:green:blue:alpha:)

Returns the components that form the color in the RGB color space.

Declaration

func getRed(_ red: UnsafeMutablePointer<CGFloat>?, green: UnsafeMutablePointer<CGFloat>?, blue: UnsafeMutablePointer<CGFloat>?, alpha: UnsafeMutablePointer<CGFloat>?) -> Bool

Parameters

  • red:

    On return, the red component of the color object. On applications linked for iOS 10 or later, an extended range sRGB color space specifies the red component and can have any value. Values between 0.0 and 1.0 are inside the sRGB color gamut. On earlier versions of iOS, the specified value is always between 0.0 and 1.0.

  • green:

    On return, the green component of the color object. On applications linked for iOS 10 or later,an extended range sRGB color space specifies the green component and can have any value. Values between 0.0 and 1.0 are inside the sRGB color gamut. On earlier versions of iOS, the specified value is always between 0.0 and 1.0.

  • blue:

    On return, the blue component of the color object. On applications linked for iOS 10 or later, an extended range sRGB color space specifies the blue component and can have any value. Values between 0.0 and 1.0 are inside the sRGB color gamut. On earlier versions of iOS, the specified value is always between 0.0 and 1.0.

  • alpha:

    On return, the opacity component of the color object, specified as a value between 0.0 and 1.0.

Return Value

true if the color could be converted, false otherwise.

Discussion

If the color is in a compatible color space, it converts into RGB format and its components return to your application. If the color isn’t in a compatible color space, the parameters don’t change.

See Also

Getting the color information