UIColor from HEX

gistfile1.m

+ (UIColor *)colorWithHex:(NSString *)hexColor
{
    // Remove the hash if it exists
    hexColor = [hexColor stringByReplacingOccurrencesOfString:@"#" withString:@""];
    int length = (int)[hexColor length];
    bool triple = (length == 3);
    NSMutableArray *rgb = [[NSMutableArray alloc] init];
    // Make sure the string is three or six characters long
    if (triple || length == 6) {
        CFIndex i = 0;
        UniChar character = 0;
        NSString *segment = @"";
        CFStringInlineBuffer buffer;
        CFStringInitInlineBuffer((__bridge CFStringRef)hexColor, &buffer, CFRangeMake(0, length));
        while ((character = CFStringGetCharacterFromInlineBuffer(&buffer, i)) != 0 ) {
            if (triple) segment = [segment stringByAppendingFormat:@"%c%c", character, character];
            else segment = [segment stringByAppendingFormat:@"%c", character];
            if ((int)[segment length] == 2) {
                NSScanner *scanner = [[NSScanner alloc] initWithString:segment];
                unsigned number;
                while ([scanner scanHexInt:&number]) {
                    [rgb addObject:[NSNumber numberWithFloat:(float)(number / (float)255)]];
                }
                segment = @"";
            }
            i++;
        }
        // Pad the array out (for cases where we're given invalid input)
        while ([rgb count] != 3) [rgb addObject:[NSNumber numberWithFloat:0.0]];
        UIColor *resultColor = [UIColor colorWithRed:[[rgb objectAtIndex:0] floatValue] green:[[rgb objectAtIndex:1] floatValue] blue:[[rgb objectAtIndex:2] floatValue] alpha:1];
        return resultColor;
    }
    else {
        NSException* invalidHexException = [NSException exceptionWithName:@"InvalidHexException"
                                                                   reason:@"Hex color not three or six characters excluding hash"
                                                                 userInfo:nil];
        @throw invalidHexException;
    }
}