Why does this code crash in iOS 5.1 but not iOS 6?

Question

This code is called from inside my Navigation views inside my Settings tab. It crashes on the last line in iOS 5.1 but NOT iOS 6. Why?

else if (indexPath.section == 0 && [[settingsArray objectAtIndex:indexPath.row] isEqualToString:@"Unlock Premium Features"])
    {
        InAppViewController *inappController = [[InAppViewController alloc] initWithNibName:@"InAppViewController" bundle:nil];
        inappController.titleString = @"Upgrade to Pro.";
        EditNavController *navController = [[EditNavController alloc] initWithRootViewController:inappController];
        [self.navigationController presentModalViewController:navController animated:NO];
    }

It crashes on:

[self.navigationController presentModalViewController:navController animated:NO];

Here is the crash:

*** Terminating app due to uncaught exception 'NSInvalidUnarchiveOperationException', reason: 'Could not instantiate class named NSLayoutConstraint'

Are you sure it's not the other way around? 'presentModalViewController' is deprecated in iOS 6. It can be replaced by presentViewController:animated:completion. (http://stackoverflow.com/questions/12507455/a-lot-of-functions-are-deprecated-ios-6) — leanne, May 13 '13 at 19:25
@leanne, 'deprecated' doesn't mean 'broken' - it means 'we're gonna break it in the next release' ;-j — foundry, May 13 '13 at 21:26

score 13 · Accepted Answer · edited Aug 18 '21 at 15:55

13

if you are using autolayout (if you created a new nib its on by default) in the view being presented, it will crash because auto layouts were only introduced in ios 6.
_{(source: raywenderlich.com)}

edited Aug 18 '21 at 15:55

Glorfindel

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answered May 13 '13 at 19:22

Fonix

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Thank you for showing how to disable it. It was one stupid button on my view that had the checkmark and it was crashing my whole setup. THANKS! – Ethan Allen May 13 '13 at 19:27
3

Still have to wait 2 minutes it says. Don't worry, I will. :) – Ethan Allen May 13 '13 at 19:29

Why does this code crash in iOS 5.1 but not iOS 6?

1 Answers1

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