Discussion on related regularity and verification in iOS application

1. Verification regularity of mobile phone number

Regular expression:

^((13[0-9])|(15[^4,\\D])|(18[0,0-9]))\\d{8}$

Detailed explanation

Explanation:

•^...$:
^: Start

$: End

In the middle is the string to be processed

(13 [0-9]): The number starting with 13 and the next digit is between 0 and 9
13: Start with 13

[0-9]: Partition syntax, 13 followed by a number between 0-9

Or (or), or operation is performed on the two matching conditions before and after

• (15 [^ 4\\ D]): Beginning with 15, the next digit is 0-9 except 4
15: Start with 15

[^ 4\\ D]: All numbers from 0 to 9 except 4

^: Non-^ 4 here is any character except 4

\ D:\ D is not a number `\ ` is an escape character

• (18 [0, 2, 5-9]): A number that begins with 18 and the next 1 bit is 0 or 2 or between 5-9

•\ d {8}: 8 digits from 0 to 9
\ d: Numbers between 0 and 9

{8}: Match 8 times

Use of regular expressions:

+ (BOOL)isMobileNumber:(NSString *)mobileNumber

{

  // Mobile phone number to 13 ,  15 , 18 At the beginning, 8 A  \d  Numeric character 

  NSString *phoneRegex = @"^((13[0-9])|(15[^4,\\D])|(18[0,0-9]))\\d{8}$";

  NSPredicate *phoneTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",phoneRegex];

  return [phoneTest evaluateWithObject:mobileNumber]; 

}

2. ID card verification

/**

 *  ID number 

 * @param NSString  ID number string 

 * @return  Whether it is an ID number 

 * d{14} 14 Bit number 

 */

+ (BOOL) validateIdentityCard: (NSString *)identityCard

{

   BOOL flag;

  if (identityCard.length <= 0) {

    flag = NO;

    return flag;

  }

  NSString *regex2 = @"^(\\d{14}|\\d{17})(\\d|[xX])$";

  NSPredicate *identityCardPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex2];

  return [identityCardPredicate evaluateWithObject:identityCard];

}

/**

 *  Accurately verify the ID number 

 * @param IdentityNum  ID number  

 * @return  Is it an ID number 

 */

+(BOOL)isValidWithIdentityNum:(NSString *)IdentityNum{

  // Preregular matching 

  //......

  

  // Calculate the last 1 Bit remainder 

  NSArray *arrExp = [NSArray arrayWithObjects:@"7", @"9", @"10", @"5", @"8", @"4", @"2", @"1", @"6", @"3", @"7", @"9", @"10", @"5", @"8", @"4", @"2", nil];

  NSArray *arrVaild = [NSArray arrayWithObjects:@"1", @"0", @"X", @"9", @"8", @"7", @"6", @"5", @"4", @"3", @"2", nil];

  

  long sum = 0;

  for (int i = 0; i < (IdentityNum.length -1); i++) {

    NSString * str = [IdentityNum substringWithRange:NSMakeRange(i, 1)];

    sum += [str intValue] * [arrExp[i] intValue];

  }

  

  int idx = (sum % 11);

  if ([arrVaild[idx] isEqualToString:[IdentityNum substringWithRange:NSMakeRange(IdentityNum.length - 1, 1)]]) {

    return YES;

  }else{

    return NO;

  }

  return YES;

}

3. Mailbox Verification

/**

 *  Verify mailbox 

 *

 * @param email  Mailbox string 

 *

 * @return  Mailbox or not 

 *

 * [A-Z0-9a-z]  Denote  A-Z  And  0-9  And  a-z  Arbitrary 1 A 

 * {2,4}     Denote   Character bits greater than 2 A, less than 4 A 

 */

+ (BOOL) validateEmail:(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];

}

4. User name verification

/**

 *  User name authentication 

 *

 * @param NSString  User name string 

 *

 * @return  User name or not 

 * {6,20} 6 To 20 Bit 

 */

+ (BOOL) validateUserName:(NSString *)name

{

  NSString *userNameRegex = @"^[A-Za-z0-9]{6,20}+$";

  NSPredicate *userNamePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",userNameRegex];

  BOOL B = [userNamePredicate evaluateWithObject:name];

  return B;

}

5. Password authentication

/**

 *  Password authentication 

 *

 * @param NSString  Password string 

 *

 * @return  Password or not 

 * {6,20} 6 To 20 Bit 

 */

+ (BOOL) validatePassword:(NSString *)passWord

{

  NSString *passWordRegex = @"^[a-zA-Z0-9]{6,20}+$";

  NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",passWordRegex];

  return [passWordPredicate evaluateWithObject:passWord];

}

6. Verify the nickname

/**

 *  Validate nicknames 

 *

 * @param NSString  Nickname string 

 *

 * @return  Nickname or not 

 * {4,8} 4 To 8 Bit 

 */

+ (BOOL) validateNickname:(NSString *)nickname

{

  NSString *nicknameRegex = @"^[\u4e00-\u9fa5]{4,8}$";

  NSPredicate *passWordPredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",nicknameRegex];

  return [passWordPredicate evaluateWithObject:nickname];

}

6, 4-bit verification code verification

/**

 * 4 Bit verification code 

 *

 * @param verifyCode  Verification code 

 *

 * @return  Is it a verification code 

 */

+ (BOOL) validateVerifyCode:(NSString *)verifyCode

{

  BOOL flag;

  if (verifyCode.length <= 0) {

    flag = NO;

    return flag;

  }

  NSString *regex2 = @"^(\\d{4})$";

  NSPredicate *verifyCodePredicate = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",regex2];

  return [verifyCodePredicate evaluateWithObject:verifyCode];

}