How to Validate Symbol Characterset in Objective c?

Question

Why is it taking range.length nil. I entered text Demo@123. In this special character is their but length will taking nil.

NSRange rang = [textField.text rangeOfCharacterFromSet:[NSCharacterSet symbolCharacterSet]];

if ( !rang.length ) {
    return NO;  // no specialCharacter
}

Check this answer - http://stackoverflow.com/questions/14557925/ios-how-to-restrict-special-characters-in-uitextfield-except-dot-and-underscores — Kampai, Dec 05 '14 at 11:37

Sulthan · Answer 1 · 2014-12-05T11:37:41.837

0

NSRange is not an object, it's a struct. Lose the * character.

NSRange rang = ...

not

NSRange *rang = ...

You should be getting a warning for this.

Okey, going through the Unicode tables, it seems that @ is not a symbol character. It is categorized as punctuation ([NSCharacterSet punctuationCharacterSet]).

edited Dec 05 '14 at 11:37

answered Dec 05 '14 at 11:05

Sulthan

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@ not consider as a symbolCharacterSet it is only reason for giving nil . – SGDev Dec 05 '14 at 11:22

How to Validate Symbol Characterset in Objective c?

1 Answers1