NSScanner behavior
[fields scanCharactersFromSet:fieldCharSet intoString:nil];

Name,Location,Number,Units
A,AA,4,mm
B,BB,3.5,km
C,CC,10.2,mi
D,DD,2,mm
E,EE,6,in
F,FF,2.8,m
G,GG,3.7,km
H,HH,4.3,mm
I,II,4,km

-(void)parseFile {
    NSCharacterSet *lineCharSet = [NSCharacterSet newlineCharacterSet];
    NSCharacterSet *fieldCharSet = [NSCharacterSet characterSetWithCharactersInString:self.separator];
    // import the file

    NSStringEncoding *encoding = nil;
    NSError *error = nil;
    NSString *data = [[NSString alloc] initWithContentsOfURL:self.absoluteURL usedEncoding:encoding error:&error];
    NSString *line,*field;


    NSScanner *lines = [NSScanner scannerWithString:data];
    while (![lines isAtEnd]) {

        [lines scanUpToCharactersFromSet:lineCharSet intoString:&line];//automatically sets to next line - why?



        NSLog(@"%@n",line);

        NSScanner *fields = [NSScanner scannerWithString:line];

        while (![fields isAtEnd]) {

            [fields scanUpToCharactersFromSet:fieldCharSet intoString:&field];

            [fields scanCharactersFromSet:fieldCharSet intoString:nil]; //have to do this otherwise will not go to next symbol

            NSLog(@"%@n", field);

        }
    }
}

-(void)parseFile {
    NSString *data = [[NSString alloc] initWithContentsOfURL:self.absoluteURL usedEncoding:encoding error:&error];

    for (NSString *line in [data componentsSeparatedByString:@"n"]) {
        if (line.length == 0)
            continue;

        NSLog(@"line: %@", line);

        for (NSString *field in [line componentsSeparatedByString:self.separator]) {
            NSLog(@"    field: %@", field);
        }
    }
}