正则表达式

纳税识别号校验
^((\\d{6}[0-9A-Z]{9})|([0-9A-Za-z]{2}\\d{6}[0-9A-Za-z]{10}))$
分析：
|表示：或。
([0-9A-Za-z]{15})表示：15位数字大小写字母组成的字符串。
所以原表达式可以分为：(\\d{6}[0-9A-Z]{9})或([0-9A-Za-z]{2}\\d{6}[0-9A-Za-z]{10})
(\\d{6}[0-9A-Z]{9})：由6位数字和9位数字大写字母组成的字符串。
([0-9A-Za-z]{2}\\d{6}[0-9A-Za-z]{10})：由2位数字大小写字母和6位数字和10位数字大小写字母组成的字符串。

/**
 纳税识别号校验

 @param taxpayerNumber 纳税识别号
 @return 返回结果
 */
- (BOOL)validateTaxpayerNumber:(NSString*)taxpayerNumber{
    NSString *regex = @"^((\\d{6}[0-9A-Z]{9})|([0-9A-Za-z]{2}\\d{6}[0-9A-Za-z]{10}))$";
    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];
    if (![pred evaluateWithObject: taxpayerNumber]) {
        return NO;
    }
    return YES;
}

判断邮箱，手机，QQ的格式

#pragma mark 判断邮箱，手机，QQ的格式
-(BOOL)isValidateEmail:(NSString *)email{

    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
    return [emailTest evaluateWithObject:email];
}

//验证手机号码的格式

- (BOOL)isMobileNumber:(NSString *)mobileNum
{
    /**
     * 手机号码
     * 移动：134[0-8],135,136,137,138,139,150,151,157,158,159,182,187,188
     * 联通：130,131,132,152,155,156,185,186
     * 电信：133,1349,153,180,189
     */
    NSString * MOBILE = @"^1(3[0-9]|5[0-35-9]|8[025-9])\\d{8}$";
    /**
     10         * 中国移动：China Mobile
     11         * 134[0-8],135,136,137,138,139,150,151,157,158,159,182,187,188
     12         */
    NSString * CM = @"^1(34[0-8]|(3[5-9]|5[017-9]|8[278])\\d)\\d{7}$";
    /**
     15         * 中国联通：China Unicom
     16         * 130,131,132,152,155,156,185,186
     17         */
    NSString * CU = @"^1(3[0-2]|5[256]|8[56])\\d{8}$";
    /**
     20         * 中国电信：China Telecom
     21         * 133,1349,153,180,189
     22         */
    NSString * CT = @"^1((33|53|8[09])[0-9]|349)\\d{7}$";
    /**
     25         * 大陆地区固话及小灵通
     26         * 区号：010,020,021,022,023,024,025,027,028,029
     27         * 号码：七位或八位
     28         */
    // NSString * PHS = @"^0(10|2[0-5789]|\\d{3})\\d{7,8}$";
    
    NSPredicate *regextestmobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", MOBILE];
    NSPredicate *regextestcm = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM];
    NSPredicate *regextestcu = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU];
    NSPredicate *regextestct = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT];
    
    if (([regextestmobile evaluateWithObject:mobileNum] == YES)
        || ([regextestcm evaluateWithObject:mobileNum] == YES)
        || ([regextestct evaluateWithObject:mobileNum] == YES)
        || ([regextestcu evaluateWithObject:mobileNum] == YES))
    {
        return YES;
    }
    else
    {
        return NO;
    }
}