iOS颜色开发设置详解

+ (UIColor *)colorWithRed:(CGFloat)red green:(CGFloat)green blue:(CGFloat)blue alpha:(CGFloat)alpha;

+ (UIColor *)colorWithHue:(CGFloat)hue saturation:(CGFloat)saturation brightness:(CGFloat)brightness alpha:(CGFloat)alpha;

UIColor *color = [UIColor redColor];
UIColor *cl = [color colorWithAlphaComponent:0.5f];

CGFloat R  = (CGFloat) 225/255.0;
CGFloat G = (CGFloat) 66/255.0;
CGFloat B = (CGFloat) 88/255.0;
CGFloat alpha = (CGFloat) 1.0;

UIColor *myColorRGB = [ UIColor colorWithRed: R  green: G  blue: B  alpha: alpha  ];
self.tableView.backgroundColor = myColorRGB;

Creating a UIColor Object from Component Values

+ colorWithWhite:alpha:

+ colorWithHue:saturation:brightness:alpha:

+ colorWithRed:green:blue:alpha:

+ colorWithCGColor:

+ colorWithPatternImage:

+ colorWithCIColor:

– colorWithAlphaComponent:

Initializing a UIColor Object

– initWithWhite:alpha:

– initWithHue:saturation:brightness:alpha:

– initWithRed:green:blue:alpha:

– initWithCGColor:

– initWithPatternImage:

– initWithCIColor:

Creating a UIColor with Preset Component Values

+ blackColor

+ darkGrayColor

+ lightGrayColor

+ whiteColor

+ grayColor

+ redColor

+ greenColor

+ blueColor

+ cyanColor

+ yellowColor

+ magentaColor

+ orangeColor

+ purpleColor

+ brownColor

+ clearColor