[Dapp]

hi,

i have 3 files in a foundation tool, main.m, scanner1.h, scanner1.m:

main.m:

#import <Foundation/Foundation.h>
#import "scanner1.h"

int main (int argc, const char * argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];


NSString *returnstring;
returnstring = [[NSString alloc] _scanString:@"\\valuen\\xak2dj\\blahblah\\xyz\\val ue1\\1\\value2\\teststring" startTag:@"\\value2" endTag:@""];
NSLog(@"Result = %@", returnstring);
[pool release];
return 0;
}

scanner1.h:

#import <Foundation/Foundation.h>


@interface scanner1 : NSObject {
NSString *_scanString;
}

-(NSString *)_scanString:(NSString *)source startTag:(NSString *)startTag endTag:(NSString *)endTag;

@end

scanner1.m:

#import "scanner1.h"


@implementation scanner1

-(NSString *)_scanString:(NSString *)source startTag:(NSString *)startTag endTag:(NSString *)endTag
{
NSScanner *scanner = [NSScanner scannerWithString:source];
NSString *result;

//find start tag
if (![scanner scanUpToString:startTag intoString:nil])

//not found!
return nil;

//skip over the strat tag we found
[scanner scanString:startTag intoString:nil];

//then scan up to the end tag in the result
[scanner scanString:endTag intoString:&result];

//see if the end tag actually exists, if so return the result, if not return nil
if ([scanner scanString:endTag intoString:nil])
return result;
else
return nil;
}


@end


i just want to scan out what after value2\\ comes. (and what after \\valueX comes)but this doesn't work! anyone knows where the problem is?

[Chuckit]

You do realize that the string "\\" actually represents a single backslash, right? Because \ is the escape character.

[Dapp]

yes, \\ is \. that's what i want. i have found the problem now:

-(NSString *)_scanString:(NSString *)source startTag:(NSString *)startTag endTag:(NSString *)endTag
{
NSScanner *scanner = [NSScanner scannerWithString:source];
NSString *result;
NSString *errormsg =@"startTag not found";
NSString *errormsg1 =@"endTag not found";

[scanner scanUpToString:startTag intoString:nil];

if ([scanner scanString:startTag intoString:nil])
{
if ([scanner scanUpToString:endTag intoString:&result])
return result;
}
}

------------------
NSString *re;
scanner1 *scanner = [[scanner1 alloc] init];
re = [scanner _scanString:@"This is a Test" startTag:@"This" endTag:@"a"];
NSLog(@"Result is %@",re);

.---> Result is is ;)