Use of Regular Expressions in [IOS] IOS

Use of Regular Expressions in IOS

In iOS, nspredicate can be used to process regular expressions. The related information is as follows:

Nspredicate:
Http://developer.apple.com/documentation/Cocoa/Conceptual/Predicates/predicates.html

Predicate format strings:
Http://developer.apple.com/documentation/Cocoa/Conceptual/Predicates/Articles/pSyntax.html

ICU regular expression rules:
Http://www.icu-project.org/userguide/regexp.html

In iOS, we use the string comparison function of nspredicate for regular expression processing. The comparison keyword is:MATCHES

Next, we will list a regular expression that matches 6-15 strings consisting of letters/numbers to see how nspredicate works:

    NSString * regex        = @"(^[A-Za-z0-9]{6,15}$)";    NSPredicate * pred      = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regex];    BOOL isMatch            = [pred evaluateWithObject:@"123456ABCde"];