Crash for certain strings about gltaplabeldemo

[richardpenner]

It looks like you're scanning up to the symbol character set, and then assuming that the symbol part of the scanned string has at least 2 characters:
NSString *word=[read substringWithRange:NSMakeRange(idx, 2)];
I fixed this with the following code:
int charactersToRead = MIN( 2, read.length );
NSString *word=[read substringWithRange:NSMakeRange(idx, charactersToRead)];
But then I found a different bug, where a sentence with a symbol in the middle, like the example above, loses it's space. NSScanners by default have whitespace and newline characters set in charactersToBeSkipped. So in the example string above, after the crash fix, your code scans in "Image ", then "|", then in the second iteration ,the "scanUpToCharactersFromSet" will ignore the " " at the beginning of the remaining string (" Code"). This is all fixed by doing this:
NSScanner *s = [NSScanner scannerWithString:self.text];
[s setCharactersToBeSkipped: nil];
But now, there's a 3rd bug, where it assumes that "words" are separated by spaces. Hence, in a string like this:
@"This is a #test-||-with some symbols."
It is rendered as:
This is a #test- ||-with some symbols.
(Note the extra space between #test- and ||). I don't see an easy way to fix this without re-writing most of this code, so I'll leave it to you. Happy to do a pull request if you care.