filter all characters out of NSString except number and '+' operand

Question

I've got a number in a string like so: @"+316-55 840 659". I want this to transform to: @"+31655840659".

Right now, I'm using this:

[[number componentsSeparatedByCharactersInSet:
                           [[NSCharacterSet decimalDigitCharacterSet] invertedSet]]
                          componentsJoinedByString:@""];

Is there a way to modify [NSCharacterSet decimalDigitCharacterSet] so that it allows the + as well?

See the following answer: http://stackoverflow.com/a/9430111/1226963 — rmaddy, Sep 25 '14 at 15:02

Ricardo Sanchez-Saez · Accepted Answer · 2014-09-26T11:05:46.363

1

You can either do:

[NSCharacterSet characterSetWithCharactersInString:@"0123456789+"]

or:

[[[NSCharacterSet decimalCharacterSet] mutableCopy] addCharactersInString:@"+"]

edited Sep 26 '14 at 11:05

answered Sep 25 '14 at 14:57

Ricardo Sanchez-Saez

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filter all characters out of NSString except number and '+' operand

1 Answers1