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Xiaobian to share with you how regular expressions to verify user names, passwords, mobile phone numbers, ID card functions, I believe that most people do not know much, so share this article for your reference, I hope you can learn a lot after reading this article, let's learn about it!

Example

/ / user name + (BOOL) validateUserName: (NSString *) name {NSString * userNameRegex = @ "^ [A-Za-z0-9] {3 NSPredicate predicateWithFormat:@ 20} + $"; NSPredicate * userNamePredicate = [NSPredicate predicateWithFormat:@ "SELF MATCHES% @", userNameRegex]; BOOL B = [userNamePredicate evaluateWithObject:name]; return B;} / / password + (BOOL) validatePassword: (NSString *) passWord {NSString * passWordRegex = @ "^ [a-zA-Z0-9] {6jue 20} + $"; NSPredicate * passWordPredicate = [NSPredicate predicateWithFormat:@ "SELF MATCHES% @", passWordRegex] Return [passWordPredicate evaluateWithObject:passWord];} / / determine whether the mobile phone number format is correct + (BOOL) valiMobile: (NSString *) mobile {mobile = [mobile stringByReplacingOccurrencesOfString:@ "" withString:@ ""]; if (mobile.length! = 11) {return NO } else {/ * regular expression of mobile number segment * / NSString * CM_NUM = @ "^ ((13 [4-9])) | (15 [0-2 7-9]) | (178) | (18 [2-4 recorder 7-8]))\ d {8} | (1705)\\ d {7} $" / * * regular expression for Unicom segment * / NSString * CU_NUM = @ "^ ((13 [0-2])) | (145) | (15 [5-6]) | (17) | (18 [5pc6]))\\ d {8} | (1709)\ d {7} $" / * * regular expression of electrical signal segment * / NSString * CT_NUM = @ "^ ((133c) | (153c) | (177C)\\ d {8} $"; NSPredicate * pred1 = [NSPredicate predicateWithFormat:@ "SELF MATCHES% @", CM_NUM]; BOOL isMatch2 = [pred1 evaluateWithObject:mobile]; NSPredicate * pred2 = [NSPredicate predicateWithFormat:@ "SELF MATCHES% @", CU_NUM]; BOOL isMatch3 = [pred2 evaluateWithObject:mobile] NSPredicate * pred3 = [NSPredicate predicateWithFormat:@ "SELF MATCHES% @", CT_NUM]; BOOL isMatch4 = [pred3 evaluateWithObject:mobile]; if (isMatch2 | | isMatch3 | | isMatch4) {return YES;} else {return NO } / * method to verify whether the ID card number is correct * * @ param IDNumber passes it into the ID card number string * * @ return returns YES or NO indicating whether the ID card number conforms to the national standard * / + (BOOL) isCorrect: (NSString *) IDNumber {NSMutableArray * IDArray = [NSMutableArray array]; / / traverses the ID card string and stores it in the array if (IDNumber.length = 18) {for (int I = 0) I < 18; iTunes +) {NSRange range = NSMakeRange (I, 1); NSString * subString = [IDNumber substringWithRange:range]; [IDArray addObject:subString];}} else {for (int I = 0; I < 15; iTunes +) {NSRange range = NSMakeRange (I, 1); NSString * subString = [IDNumber substringWithRange:range]; [IDArray addObject:subString] }} / coefficient array NSArray * coefficientArray = [NSArray arrayWithObjects:@ "7", @ "9", @ "10", @ "5", @ "8", @ "4", @ "2", @ "1", @ "6", @ "3", @ "7", @ "9", @ "10", @ "5", @ "8", @ "4", @ "2", nil] / / the remainder array NSArray * remainderArray = [NSArray arrayWithObjects:@ "1", @ "0", @ "X", @ "9", @ "8", @ "7", @ "6", @ "5", @ "4", @ "3", @ "2", nil]; / / the sum of each ID number multiplied by the corresponding coefficient and int sum = 0 If (IDNumber.length = = 18) {for (int I = 0; I < 17; iArray +) {int coefficient = [coincidentArray [I] intValue]; int ID = [ID Array [I] intValue]; sum + = coefficient * ID;}} else {for (int I = 0; I < 14; iArray +) {int coefficient = [coexistent Array [I] intValue]; int ID = [ID Array [I] intValue]; sum + = coefficient * ID }} / / the number NSString * str = remainderArray [(sum% 11)] corresponding to the remainder divided by 11; / / the last digit of the ID card number NSString * string; if (IDNumber.length = = 18) {string = [IDNumber substringFromIndex:17];} else {string = [IDNumber substringFromIndex:14] } / / if this number is the same as the last digit of the ID card, it conforms to the national standard. Return YES if ([str isEqualToString:string]) {return YES;} else {return NO;}} above is all the contents of the article "how to verify the user name, password, mobile phone number and ID card function of regular expressions". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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