UIColor 转 16进制颜色值

+ (NSString *)ToHex:(int)tmpid {

    NSString *endtmp = @"";

    NSString *nLetterValue;

    NSString *nStrat;

    int ttmpig = tmpid % 16;

    int tmp = tmpid / 16;

    switch (ttmpig) {

        case 10:

            nLetterValue = @"A"; break;

        case 11:

            nLetterValue = @"B"; break;

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        case 12:

            nLetterValue = @"C"; break;

        case 13:

            nLetterValue = @"D"; break;

        case 14:

            nLetterValue = @"E"; break;

        case 15:

            nLetterValue = @"F"; break;

        default:

            nLetterValue = [NSString stringWithFormat:@"%i", ttmpig];

    }

    switch (tmp) {

        case 10:

            nStrat = @"A";

            break;

        case 11:

            nStrat = @"B";

            break;

        case 12:

            nStrat = @"C";

            break;

        case 13:

            nStrat = @"D";

            break;

        case 14:

            nStrat = @"E";

            break;

        case 15:

            nStrat = @"F";

            break;

        default:

            nStrat = [NSString stringWithFormat:@"%i", tmp];

    }

    endtmp = [NSString stringWithFormat:@"%@%@", nStrat, nLetterValue];

    return endtmp;

}

 

 

+ (NSString *)changeUIColorToRGB:(UIColor *)color {

    const CGFloat *cs = CGColorGetComponents(color.CGColor);

    

    NSString *r = [NSString stringWithFormat:@"%@", [PublicUnit ToHex:cs[0] * 255]];

    NSString *g = [NSString stringWithFormat:@"%@", [PublicUnit ToHex:cs[1] * 255]];

    NSString *b = [NSString stringWithFormat:@"%@", [PublicUnit ToHex:cs[2] * 255]];

    

    NSString *t = [NSString stringWithFormat:@"#%@%@%@", r, g, b];

    return t;

}

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转载自374016526.iteye.com/blog/2054591