IOS NSString Remove other characters (space carriage return)

There are times when you need to process strings. Now let's summarize the process of deleting special characters from a string .

1.stringByTrimmingCharactersInSet This method can only handle the special characters in the two parts before and after the string. But there's nothing in the middle of the string .

NSString *str =@ "123:: daf\n-N";

NSString * str2 = [strstringbytrimmingcharactersinset:[nscharactersetwhitespaceandnewlinecharacterset]];// Whitespaceandnewlinecharacterset remove both ends of the space and carriage return, some other parameters can be self-examination

NSLog (@ "str2:%@", str2);

NSString *str1 =@ e:e \ GE::::::;

NSString *STR3 = [str1stringbytrimmingcharactersinset:[nscharactersetcharactersetwithcharactersinstring:@ ":"]];// Remove the colon at both ends

NSLog (@ "str3:%@", STR3);

2. Remove all special characters or characters that are not special in the string

The following code is to delete all the spaces in the string, carriage returns:

NSString *str = @ "123:: daf\n";

nsmutablestring *mutstr = [NSMUTABLESTRINGSTRINGWITHSTRING:STR];

Nsrange range = {0,str.length};

[Mutstr replaceoccurrencesofstring:@ "" withstring:@ "" options:NSLiteralSearchrange:range];

Nsrange range2 = {0,mutstr.length};

[Mutstr replaceoccurrencesofstring:@ "\ withstring:@" "options:NSLiteralSearchrange:range2];

NSLog (@ "%@", mutstr);