RE: multiple componentsSeparatedByString

FROM : Koen van der Drift
DATE : Sat Nov 23 18:34:03 2002

>2. Use an NSScanner, which can look for sets of characters.  You can define
>your own set of characters to scan for.  Scanner code is quite ugly and
>verbose compared to componentsSeparatedByString:, but it gets the job done.
>

I am trying this now, but run in some problems. Here's a snippet:

    NSMutableArray    *anArray;
    NSScanner        *scanner;
    NSCharacterSet    *stopSet;
    NSString        *result;

    anArray = [[NSMutableArray alloc] init];
    scanner = [NSScanner scannerWithString:s];
    stopSet = [NSCharacterSet characterSetWithCharactersInString:@"ABC];

    while (! [scanner isAtEnd])
    {
        if ([scanner scanCharactersFromSet:stopSet intoString:&result])
        {
            [anArray addObject:result];
        }
    }


So what I want to do is scan the string s, and everytime either the
character 'A' or 'B' or 'C' is found take the part of s (including either A
or B or C), and store it in result.

So if the input is: QWERTYASDFGZXCVBNM

I would like to get the following strings in anArray:

QWERTYA
SDFGZXC
VB
NM

However, the code above just stays in an infinite loop. If I use

[scanner scanUpToCharactersFromSet:stopSet intoString:&result], I only get
the first string, minus the 'A', and then the loop is infinite again.


How can I fix this?


thanks,

- Koen.
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