Objective-c – Remove all but numbers from NSString

nsstringobjective c

I have an NSString (phone number) with some parenthesis and hyphens as some phone numbers are formatted. How would I remove all characters except numbers from the string?

Best Answer

Old question, but how about:

  NSString *newString = [[origString componentsSeparatedByCharactersInSet:
                [[NSCharacterSet decimalDigitCharacterSet] invertedSet]] 
                componentsJoinedByString:@""];

It explodes the source string on the set of non-digits, then reassembles them using an empty string separator. Not as efficient as picking through characters, but much more compact in code.

Related Solutions

Ios – Remove HTML Tags from an NSString on the iPhone

A quick and "dirty" (removes everything between < and >) solution, works with iOS >= 3.2:

-(NSString *) stringByStrippingHTML {
  NSRange r;
  NSString *s = [[self copy] autorelease];
  while ((r = [s rangeOfString:@"<[^>]+>" options:NSRegularExpressionSearch]).location != NSNotFound)
    s = [s stringByReplacingCharactersInRange:r withString:@""];
  return s;
}

I have this declared as a category os NSString.

Objective-c – How to add percent sign to NSString

The code for percent sign in NSString format is %%. This is also true for NSLog() and printf() formats.

Best Answer

Related Solutions

Ios – Remove HTML Tags from an NSString on the iPhone

Objective-c – How to add percent sign to NSString

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