scan string using nsscanner class

Question

I want to scan this string

"hello I am emp 1313 object of string class 123"

so in this I want to know if their are any integer value present and if present I want to display them for this I am using the NSScanner class and heres a view of my code

NSString *str = @" hello I am emp 1313 object of string class 123";

NSString *limit = @" object";
NSScanner *scanner = [NSScanner scannerWithString:str];

int i;
[scanner scanInt:&i];
NSString *output;
[scanner scanUpToString:limit intoString:&output];
NSLog(@"%d",i);

but the problem is that I am not able to do it and I want to use NSScanner class only so can you experts give me some suggesstions regarding this.....

Nick Moore · Accepted Answer · 2010-10-27 13:43:03Z

11

Give this a try:

NSString *str = @" hello i am emp 1313 object of string class 123";
NSScanner *scanner = [NSScanner scannerWithString:str];

// set it to skip non-numeric characters
[scanner setCharactersToBeSkipped:[[NSCharacterSet decimalDigitCharacterSet] invertedSet]];

int i;
while ([scanner scanInt:&i])
{
    NSLog(@"Found int: %d",i);
}

// reset the scanner to skip numeric characters
[scanner setScanLocation:0];
[scanner setCharactersToBeSkipped:[NSCharacterSet decimalDigitCharacterSet]];

NSString *resultString;
while ([scanner scanUpToCharactersFromSet:[NSCharacterSet decimalDigitCharacterSet] intoString:&resultString]) {
    NSLog(@"Found string: %@",resultString);
}

It outputs:

2010-10-27 14:40:39.137 so[2482:a0f] Found int: 1313
2010-10-27 14:40:39.140 so[2482:a0f] Found int: 123
2010-10-27 14:40:39.141 so[2482:a0f] Found string:  hello i am emp 
2010-10-27 14:40:39.141 so[2482:a0f] Found string:  object of string class

edited Oct 27, 2010 at 13:43

answered Oct 27, 2010 at 11:28

Nick Moore

15.9k6 gold badges64 silver badges85 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

Radix Over a year ago

and can u also tell me how to find strings only

Radix Over a year ago

am trying to do the same by this piece of line [scanner setCharactersToBeSkipped:[[NSCharacterSet alphanumericCharacterSet]invertedSet]];

Nick Moore Over a year ago

i've updated the answer to include scanning for strings. invertedSet basically says "all characters except these ones"

Collectives™ on Stack Overflow

scan string using nsscanner class

1 Answer 1

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related