GCKColor Class

AI-generated Key Takeaways

• GCKColor is a class that represents an RGBA color and inherits from NSObject, <NSCopying>, and <NSCoding>.

• You can initialize a GCKColor object using red, green, blue, and alpha values, or from a UIColor or CGColor.

• A GCKColor object can also be created from and converted to a CSS string representation in the format "#RRGGBBAA".

• The class provides convenient methods to get standard colors like black, red, green, blue, cyan, magenta, yellow, and white.

• The red, green, blue, and alpha properties of a GCKColor object represent the intensity and transparency of the color, with values ranging from 0.0 to 1.0.

Instance Methods | Class Methods | Properties

GCKColor Class Reference

Overview

A class that represents an RGBA color.

Inherits NSObject, <NSCopying>, and <NSCoding>.

Instance Method Summary
(instancetype)	- initWithRed:green:blue:alpha:
	Designated initializer. More...
(instancetype)	- initWithRed:green:blue:
	Constructs a GCKColor object with the given red, green, blue values and an alpha value of 1.0 (full opacity). More...
(instancetype)	- initWithUIColor:
	Constructs a GCKColor object from a UIColor. More...
(instancetype)	- initWithCGColor:
	Constructs a GCKColor object from a CGColor. More...
(instancetype)	- initWithCSSString:
	Constructs a GCKColor object from a CSS string representation in the form "#RRGGBBAA". More...
(NSString *)	- CSSString
	Returns a CSS string representation of the color, in the form "#RRGGBBAA". More...

Class Method Summary
(GCKColor *)	+ black
	The color black. More...
(GCKColor *)	+ red
	The color red. More...
(GCKColor *)	+ green
	The color green. More...
(GCKColor *)	+ blue
	The color blue. More...
(GCKColor *)	+ cyan
	The color cyan. More...
(GCKColor *)	+ magenta
	The color magenta. More...
(GCKColor *)	+ yellow
	The color yellow. More...
(GCKColor *)	+ white
	The color white. More...

Property Summary
CGFloat	red
	The red intensity of the color; a value in the range [0.0, 1.0]. More...
CGFloat	green
	The green intensity of the color; a value in the range [0.0, 1.0]. More...
CGFloat	blue
	The blue intensity of the color; a value in the range [0.0, 1.0]. More...
CGFloat	alpha
	The alpha (transparency) of the color; a value in the range [0.0, 1.0]. More...

Method Detail

- (instancetype) initWithRed:		(CGFloat)	red
green:		(CGFloat)	green
blue:		(CGFloat)	blue
alpha:		(CGFloat)	alpha

Designated initializer.

Constructs a GCKColor object with the given red, green, blue, and alpha values. All color components are in the range [0.0, 1.0].

- (instancetype) initWithRed:		(CGFloat)	red
green:		(CGFloat)	green
blue:		(CGFloat)	blue

Constructs a GCKColor object with the given red, green, blue values and an alpha value of 1.0 (full opacity).

All color components are in the range [0.0, 1.0].

- (instancetype) initWithUIColor:

(UIColor *)

color

Constructs a GCKColor object from a UIColor.

- (instancetype) initWithCGColor:

(CGColorRef)

color

Constructs a GCKColor object from a CGColor.

- (instancetype) initWithCSSString:

(NSString *)

CSSString

Constructs a GCKColor object from a CSS string representation in the form "#RRGGBBAA".

- (NSString *) CSSString

Returns a CSS string representation of the color, in the form "#RRGGBBAA".

+ (GCKColor *) black

The color black.

+ (GCKColor *) red

The color red.

+ (GCKColor *) green

The color green.

+ (GCKColor *) blue

The color blue.

+ (GCKColor *) cyan

The color cyan.

+ (GCKColor *) magenta

The color magenta.

+ (GCKColor *) yellow

The color yellow.

+ (GCKColor *) white

The color white.

Property Detail

- (CGFloat) red

readnonatomicassign

The red intensity of the color; a value in the range [0.0, 1.0].

- (CGFloat) green

readnonatomicassign

The green intensity of the color; a value in the range [0.0, 1.0].

- (CGFloat) blue

readnonatomicassign

The blue intensity of the color; a value in the range [0.0, 1.0].

- (CGFloat) alpha

readnonatomicassign

The alpha (transparency) of the color; a value in the range [0.0, 1.0].