NSScanner to parse file

I am trying to use NSScanner to parse an ics file (that for the sake of parsing has been converted to a text file) i.e: calendar file.txt

here is the format of the text file:

BEGIN:VEVENT  
DTSTAMP:20101129T061152Z  
UID:101139897313172011030314:00  
SUMMARY:14:00 - SYSI30251 - CB100 - SEM B  
DESCRIPTION:14:00 - 15:00, SYSI30251 - Module Name<br />Group: B <b>Seminar with Lecturer in room(s) (Clif) Computing Bldg 100  
DTSTART;TZID=Europe/London:20110303T140000  
DTEND;TZID=Europe/London:20110303T150000  
SEQUENCE:2  
END:VEVENT  
BEGIN:VEVENT  
DTSTAMP:20101129T061152Z  
UID:1011558905160182011030315:00  
SUMMARY:15:00 - COMP30251 - CFL015 - LEC    
DESCRIPTION:15:00 - 16:00, COMP30251 - Project Management<br /> Lecture with Lecturer in room(s) (Clif) Centre For Learning 015  
DTSTART;TZID=Europe/Lond开发者_开发技巧on:20110303T150000  
DTEND;TZID=Europe/London:20110303T160000  
SEQUENCE:2  
END:VEVENT  

The above is a the format of the file. Below is my code:

NSString *path = [[NSBundle mainBundle] pathForResource:@"180946_icalfile" ofType:@"txt"];
    NSString *fileComponents = [[NSString alloc] initWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];
    NSArray *lines = [fileComponents componentsSeparatedByString:@"\n"];


    NSEnumerator *nse = [lines objectEnumerator];
    NSString *mod;
    while(fileComponents = [nse nextObject]) {
        NSString *stringBetweenBrackets = nil;
        NSScanner *scanner = [NSScanner scannerWithString:fileComponents];
        [scanner scanUpToString:@"," intoString:nil];
        [scanner scanString:@"" intoString:nil];
        [scanner scanUpToString:@"DTSTART" intoString:&stringBetweenBrackets];

        NSLog(@"%@", stringBetweenBrackets);

Basically I want to store all the 'DESCRIPTIONS' and store them as variables or as part of an array. Currently, the code outputs the descriptions onto the console and i would like to save them as variables. Could someone show me how this could be done?

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I can't sure that this is exactly what you want, however http://parsekit.com/ can make your work more easier. It will make source code into token array. And you can iterate each tokens to filter "DESCRIPTIONS" token, and collect following tokens to process.

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Try using the following regexp instead of using the NSScanner:

/DESCRIPTION:([^\n]+)\n/is