Home/ Questions/Q 6145099
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-23T18:44:50+00:00

I have a NSPredicate which looks like this … NSPredicate *predicate = [NSPredicate predicateWithFormat

  • 0

I have a NSPredicate which looks like this …

NSPredicate *predicate = [NSPredicate predicateWithFormat : @"keyword MATCHES[c] %@", theKeyword];

where
theKeyword = @"?";

The predicate crashed with the following exception …

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't do regex matching, reason: (Can't open pattern U_REGEX_RULE_SYNTAX (string D;rdz;oirnodzirngzdorngzdorngzdrjgnz@dorjn
Isdjfij
Fisdjfisj
Jsifjsijfs
Ifjifjs
Isjfidsj
Fjisjfi
, pattern ？, case 1, canon 2))'

Does anybody know why it just won’t work?
Thanks for all the help >”<

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    I’m not familiar with NSPredicate, but if ? is supposed to be a regular expression, then it’s invalid. The question mark is a quantifier, meaning “zero or one instances of the previous token” – and there is no token to repeat. What do you want your regex to do?

    If you want to match a literal question mark, then you need to escape it using backslashes (regex literal: \?, regex string: \\?)

    • 0