#define ColorWithString(string) [MPUniversal colorWithString:string]

/**

 *  转换字符串为UIColor

 *

 *  @param string 字符串类型：ffffff六位,ffffffff八位,#ffffff,#ffffffff; 字符允许大小写交叉

 *

 *  @return uicolor 参数错误时，返回黑色

 */

+ (NSUInteger)valueWithCharacher:(char)c

{

    if (c >= ‘a‘ && c <= ‘f‘) return c - ‘a‘ + 10;

    if (c >= ‘A‘ && c <= ‘F‘) return c - ‘A‘ + 10;

    if (c >= ‘0‘ && c <= ‘9‘) return c - ‘0‘;

    return 0;

}

+ (UIColor *)colorWithString:(NSString *)string;

{

    if (![string isKindOfClass:[NSString class]]) {

        NSLog(@"MPUniversal col orWithString: 参数错误");

        return [UIColor blackColor];

    }

    CGFloat components[4] = {};

    components[3] = 1.0f;

//if ([cString hasPrefix:@"0X"]) cString = [cString substringFromIndex:2];//if ([cString hasPrefix:@"#"]) cString = [cString substringFromIndex:1];

    if ([string length] % 2 == 1) {

        //去#号

        string = [string substringFromIndex:1];

    }

    for (int i = 0; i < [string length]; i+=2) {

        components[i/2] = [self valueWithCharacher:[string characterAtIndex:i]] * 16 + [self valueWithCharacher:[string characterAtIndex:i+1]];

        components[i/2] = components[i/2]/255.f;

    }

    return [UIColor colorWithRed:components[0] green:components[1] blue:components[2] alpha:components[3]];

}