ios-remove spaces, special symbols from strings

In iOS, you can use the Stringbytrimmingcharactersinset function to filter special symbols in strings.

1,

First you define a Nscharacterset, which contains special symbols that need to be removed.

Nscharacterset *set1 = [Nscharacterset charactersetwithcharactersinstring:@ @/:; () ¥"" ", []{}#%-*+=_\\|~ <> $€^· ' @#$%^ &* () _+ ' ""];

Because there are full-width and half-width symbols in the nsstring, some symbols include full-width and half-width

Then call Stringbytrimmingcharactersinset

NSString *trimmedstring1 = [string Stringbytrimmingcharactersinset:set1];

TrimmedString1 is the filtered string

2. Remove Space

Nscharacterset *set2 = [Nscharacterset whitespaceandnewlinecharacterset];

NSString *trimmedstring2 = [string Stringbytrimmingcharactersinset:set2];