下面的代码是从导航视图中调用出来的,在IOS5中运行时,最后一行报错引起崩溃,但是在6.1中运行正常,为什么?
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];
}
崩溃于:
[self.navigationController presentModalViewController:navController animated:NO];
信息:
*** Terminating app due to uncaught exception 'NSInvalidUnarchiveOperationException', reason: 'Could not instantiate class named NSLayoutConstraint'