iOS string filter character--nscharacterset

You can use the Stringbytrimmingcharactersinset function in OC to filter special symbols in a string.

First define a nscharacterset that contains the special symbols that need to be filtered,

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

Here both the full-width and half-width characters are included, and then the Stringbytrimmingcharactersinset method is called

NSString *newstring = [string stringbytrimmingcharactersinset:set];

NewString is the filtered string.

iOS string filter character--nscharacterset