iphone-common-codes-ccteam源代码 CCUIColor.m

//  
//  CCUIColor.m  
//  CCFC  
//  
//  Created by xichen on 11-12-17.  
//  Copyright 2011年 ccteam. All rights reserved.  
//
  
  
#import "CCUIColor.h"  
  
  
  
  
@implementation UIColor(cc)  
  
  
// 获取UIColor的RGBA的值  
- (void)getRGBAValue:(CGFloat *)red   
               green:(CGFloat *)green   
                blue:(CGFloat *)blue   
               alpha:(CGFloat *)alpha  
{  
        CGColorRef colorRef = [self CGColor];  
          
        const CGFloat *tmComponents = CGColorGetComponents(colorRef);  
        if(red)  
                *red = tmComponents[0];  
  
  
        if(green)  
                *green = tmComponents[1];  
      
        if(blue)  
                *blue = tmComponents[2];  
  
  
        if(alpha)  
                *alpha = tmComponents[3];  
}  
  
  
- (CGFloat)getRedValue  
{  
        CGColorRef colorRef = [self CGColor];  
          
        const CGFloat *tmComponents = CGColorGetComponents(colorRef);  
        return tmComponents[0];  
}  
  
  
- (CGFloat)getGreenValue  
{  
        CGColorRef colorRef = [self CGColor];  
          
        const CGFloat *tmComponents = CGColorGetComponents(colorRef);  
        return tmComponents[1];  
}  
  
  
- (CGFloat)getBlueValue  
{  
        CGColorRef colorRef = [self CGColor];  
          
        const CGFloat *tmComponents = CGColorGetComponents(colorRef);  
        return tmComponents[2];  
}  
  
  
- (CGFloat)getAlphaValue  
{  
        CGColorRef colorRef = [self CGColor];  
          
        const CGFloat *tmComponents = CGColorGetComponents(colorRef);  
        return tmComponents[3];  
}  
  
  
// 由RGB的值获得CGColorRef指针  
// you should release the returnValue by your hand.  
+ (CGColorRef)createCGColorRefByRGB:(CGFloat)red   
                              green:(CGFloat)green   
                               blue:(CGFloat)blue   
                              alpha:(CGFloat)alpha  
{  
        CGColorSpaceRef rgb = CGColorSpaceCreateDeviceRGB();  
        const CGFloat rgbColor[] = {(float)red / 255, (float)green / 255 , (float) blue / 255, (float) alpha / 255};  
        CGColorRef color = CGColorCreate(rgb, rgbColor);  
        CGColorSpaceRelease(rgb);  
          
        return color;  
}  
  
  
// print the RGBA info of the UIColor  
- (void)printRGBA  
{  
        CGColorRef colorRef = [self CGColor];  
        const CGFloat *tmComponents = CGColorGetComponents(colorRef);  
        NSLog(@"%@ R:%f, G:%f, B:%f, A:%f",   
                  self, tmComponents[0], tmComponents[1], tmComponents[2], tmComponents[3]);  
}  
  
  
@end 

 

可能有更新:

googlecode链接地址：http://code.google.com/p/iphone-common-codes-ccteam/source/browse/trunk/CCFC/files/CCUIColor.m
github地址: https://github.com/cxsjabc/iphone-common-codes-ccteam/tree/master/CCFC/files/CCUIColor.m