iOS Hex 转 UIColor

+ (UIColor *)colorWithHex:(NSString *)string

{

    NSString *cleanString = [string stringByReplacingOccurrencesOfString:@"#" withString:@""];

    if([cleanString length] == 3) {

        cleanString = [NSString stringWithFormat:@"%@%@%@%@%@%@",

                       [cleanString substringWithRange:NSMakeRange(0, 1)],[cleanString substringWithRange:NSMakeRange(0, 1)],

                       [cleanString substringWithRange:NSMakeRange(1, 1)],[cleanString substringWithRange:NSMakeRange(1, 1)],

                       [cleanString substringWithRange:NSMakeRange(2, 1)],[cleanString substringWithRange:NSMakeRange(2, 1)]];

    }

    if([cleanString length] == 6) {

        cleanString = [cleanString stringByAppendingString:@"ff"];

    }

    

    unsigned int baseValue;

    [[NSScanner scannerWithString:cleanString] scanHexInt:&baseValue];

    

    float red = ((baseValue >> 24) & 0xFF)/255.0f;

    float green = ((baseValue >> 16) & 0xFF)/255.0f;

    float blue = ((baseValue >> 8) & 0xFF)/255.0f;

    

    return [UIColor colorWithRed:red green:green blue:blue alpha:1.0];

}