How to resolve a NULL cString crash

Question

I'm getting a crash with the following encoding fix I'm trying to implement:

  // encoding fix
    NSString *correctStringTitle = [NSString stringWithCString:[[item objectForKey:@"main_tag"] cStringUsingEncoding:NSISOLatin1StringEncoding] encoding:NSUTF8StringEncoding];

    cell.titleLabel.text = [correctStringTitle capitalizedString];

my crash log output states:

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** +[NSString stringWithCString:encoding:]: NULL cString'

thanks for any help

score 2 · Accepted Answer · edited Feb 03 '13 at 15:10

2

You seem to think that a double conversion is necessary in order to get the correct result. It isn't, nor is it possible (that's why the call to cStringUsingEncoding:NSISOLatin1StringEncoding returns NULL). Just leave this part out and assign to correctStringTitle directly.

edited Feb 03 '13 at 15:10

NSGod

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answered Feb 03 '13 at 15:02

I trimmed it down to: // encoding fix cell.titleLabel.text = [[NSString stringWithCString:[[item objectForKey:@"main_tag"] cStringUsingEncoding:NSISOLatin1StringEncoding]]capitalizedString]; but the encoding issue remains. are you saying to remove the cStringUsingEncoding:NSISOLatin1StringEncoding completely? thanks – hanumanDev Feb 03 '13 at 15:45
I thought I had to use this Latin1StringEncoding for some Spanish accented characters that were displaying. it should look like this then: cell.titleLabel.text = [[NSString stringWithCString:[[item objectForKey:@"main_tag"] encoding:NSUTF8StringEncoding] capitalizedString]; ? – hanumanDev Feb 03 '13 at 17:25
@hanumanDev 1. Why would you **have to?** The encoding is your choice. 2. No, remove all that clutter. `cell.titleLabel.text = [[item objectForKey:@"main_tag"];`. – Feb 03 '13 at 17:26
the problem is that if I don't encode then some character show up like "Espaå+_A" etc... particularly with Spanish – hanumanDev Feb 03 '13 at 17:37

score 0 · Answer 2 · edited Jul 02 '13 at 11:02

0

I had the same problem with italian accented characters while trying to get text from html and my solution to avoid the situation that cStringUsingEncoding:NSISOLatin1StringEncoding returns NULL is ensuring that when you get the html from data you use:

[[NSString alloc] initWithData:self.responseData encoding:NSISOLatin1StringEncoding]

and not

encoding:NSUTF8StringEncoding

edited Jul 02 '13 at 11:02

Robert

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answered Jul 02 '13 at 10:39

Angelico

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How to resolve a NULL cString crash

2 Answers2