replace characters in a string

Question

i have a sting in which i want to replace all characters(except special characters) by X.. i mean if i have a string str= mac,iphone & ipad are products of apple

theis should be converted to

str= XXX,XXXXXX & XXXX XXX XXXXXXXX XX XXXXX

i know this can be done by finding all special characters and note their position and then replace all other characters except these special characters but there are so many special characters should i check them one by one ? or is there any other method to identify them

please help

Answer 1

[Nsstring stringByReplacingOccurrencesOfString:@"" withString:@"X"];

from this you can replace string according to my knowledge

Answer 2

I'd use a regular expression. Check out the documentation for NSRegularExpression

Answer 3

NSString *str=@"mac,iphone & ipad";

for(int i=0;i<[str length];i++)
{
    int str1=(int)[str characterAtIndex:i];
    NSString *temp=[NSString stringWithFormat:@"%C",str1];

    if(str1 >96 && str1 <123  || str1 >64 && str1 <91)

        str = [str stringByReplacingOccurrencesOfString:temp withString:@"X"];
}

Hope this helps...This will replace all characters either in upper/lower case

Answer 4

NSString *s = @"foo/bar:baz.foo"; NSCharacterSet *doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"/:."]; s = [[s componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @""]; NSLog(@"%@", s);

Try this it is more useful when the above answered ways don't replaces the charachters.

Please vote me up if it helps you. I am new to iphone development.

Answer 5

• (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string { if(TextFound) { NSCharacterSet *doNotWant = [NSCharacterSet characterSetWithCharactersInString:@"/
  "]; string = [[string componentsSeparatedByCharactersInSet: doNotWant] componentsJoinedByString: @""];

      TextStr = [TextStr stringByAppendingString:string];
  }
  

  }

As i did it in my parsing, it was showing linebreak character in the text.I tried the way stringbyrplacingoccurance of string ,but nothing happened ,so finally it worked.

hope it will help you