Как классы C # работают со знаками доллара в JSON?

Другой способ:

Интерфейс:

-(NSString *) stringByStrippingHTML:(NSString*)inputString;

Реализация

(NSString *) stringByStrippingHTML:(NSString*)inputString
{ 
NSAttributedString *attrString = [[NSAttributedString alloc] initWithData:[inputString dataUsingEncoding:NSUTF8StringEncoding] options:@{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,NSCharacterEncodingDocumentAttribute: @(NSUTF8StringEncoding)} documentAttributes:nil error:nil];
NSString *str= [attrString string]; 

//you can add here replacements as your needs:
    [str stringByReplacingOccurrencesOfString:@"[" withString:@""];
    [str stringByReplacingOccurrencesOfString:@"]" withString:@""];
    [str stringByReplacingOccurrencesOfString:@"\n" withString:@""];

    return str;
}

Реализация

cell.exampleClass.text = [self stringByStrippingHTML:[exampleJSONParsingArray valueForKey: @"key"]];

или просто

NSString *myClearStr = [self stringByStrippingHTML:rudeStr];