将UIColor转换为RGB值

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//将UIColor转换为RGB值- (NSMutableArray *) changeUIColorToRGB:(UIColor *)color{    NSMutableArray *RGBStrValueArr = [[NSMutableArray alloc] init];    NSString *RGBStr = nil;    //获得RGB值描述    NSString *RGBValue = [NSString stringWithFormat:@"%@",color];    //将RGB值描述分隔成字符串    NSArray *RGBArr = [RGBValue componentsSeparatedByString:@" "];    //获取红色值    int r = [[RGBArr objectAtIndex:1] intValue] * 255;    RGBStr = [NSString stringWithFormat:@"%d",r];    [RGBStrValueArr addObject:RGBStr];    //获取绿色值    int g = [[RGBArr objectAtIndex:2] intValue] * 255;    RGBStr = [NSString stringWithFormat:@"%d",g];    [RGBStrValueArr addObject:RGBStr];    //获取蓝色值    int b = [[RGBArr objectAtIndex:3] intValue] * 255;    RGBStr = [NSString stringWithFormat:@"%d",b];    [RGBStrValueArr addObject:RGBStr];    //返回保存RGB值的数组    return [RGBStrValueArr autorelease];}

//16进制颜色(html颜色值)字符串转为UIColor+(UIColor *) hexStringToColor: (NSString *) stringToConvert{     NSString *cString = [[stringToConvert stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];     // String should be 6 or 8 characters        if ([cString length] < 6) return [UIColor blackColor];     // strip 0X if it appears     if ([cString hasPrefix:@"0X"]) cString = [cString substringFromIndex:2];     if ([cString hasPrefix:@"#"]) cString = [cString substringFromIndex:1];     if ([cString length] != 6) return [UIColor blackColor];        // Separate into r, g, b substrings        NSRange range;     range.location = 0;     range.length = 2;     NSString *rString = [cString substringWithRange:range];     range.location = 2;     NSString *gString = [cString substringWithRange:range];     range.location = 4;     NSString *bString = [cString substringWithRange:range];     // Scan values     unsigned int r, g, b;        [[NSScanner scannerWithString:rString] scanHexInt:&r];     [[NSScanner scannerWithString:gString] scanHexInt:&g];     [[NSScanner scannerWithString:bString] scanHexInt:&b];        return [UIColor colorWithRed:((float) r / 255.0f)                                 green:((float) g / 255.0f)                                   blue:((float) b / 255.0f)                                 alpha:1.0f];}

- (NSMutableArray *) changeUIColorToRGB:(UIColor *)color{    size_t  n = CGColorGetNumberOfComponents(color.CGColor);    const CGFloat *rgba = CGColorGetComponents(color.CGColor);    NSMutableArray *resultArr = [NSMutableArray arrayWithCapacity:n];    for (int i=0; i<n; i++)     {        [resultArr addObject:[NSNumber numberWithFloat:rgba]];    }    return resultArr;}

【OBJC类扩展之Hex值颜色转换】UIColor+Hex#import <UIKit/UIKit.h>@interface UIColor (Hex)+ (UIColor *)colorWithHex:(long)hexColor;+ (UIColor *)colorWithHex:(long)hexColor alpha:(float)opacity;@end#import "UIColor+Hex.h"@implementation UIColor (Hex)+ (UIColor*) colorWithHex:(long)hexColor;{    return [UIColor colorWithHex:hexColor alpha:1.];    }+ (UIColor *)colorWithHex:(long)hexColor alpha:(float)opacity{    float red = ((float)((hexColor & 0xFF0000) >> 16))/255.0;    float green = ((float)((hexColor & 0xFF00) >> 8))/255.0;    float blue = ((float)(hexColor & 0xFF))/255.0;    return [UIColor colorWithRed:red green:green blue:blue alpha:opacity];  }   @end

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