16进制颜色(html颜色值)字符串转为UIColor

//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];

}