We now understand this issue much better. Working with Testers on devices using Japanese and Foreign languages and making some small changes to better handle Unicode we can reproduce the issue, but do not understand how to fix. We noticed the mismatch between the first character index on this screen shot attached and realized that our code to return the first character was not handling Unicode properly.
We therefore modified the code that returns the first Character of the Name Field and which produces the index of first letters running down the right side to be like so. This code is a method on our NSManagedObject that is the object used as the Entity in the DB for fetching. It has some debug Log statements.
This code crashes if we use the localizedUppercaseString and does not if we remove that?
// Used by NSFetchedResultController Table of Charts by first letter
-(NSString *)nameFirstLetter
{
if(self.name != nil) {
//return [[self.name substringToIndex:1] localizedUppercaseString];
NSString *str = [self.name substringWithRange:[self.name rangeOfComposedCharacterSequenceAtIndex:0]];
NSLog(@"**** Name:[%@] 1st[%@] Upper[%@]", self.name, str, [str localizedUppercaseString]);
return [str localizedUppercaseString]; //[[self.name substringWithRange:[self.name rangeOfComposedCharacterSequenceAtIndex:0]] localizedUppercaseString];
}
else
return @"?";
}
It is crashing with a FetchRequest that is initialized using this code below. There is some issue created by doing the localizedUpperCase and the _sectionNameKeyPath that uses that returned value in the FetchRequest
_fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:moc sectionNameKeyPath:_sectionNameKeyPath cacheName:nil];
-(void)initializeFetchedResultsController
{
// Already inititialized
if(_fetchedResultsController != nil) return;
// Create and configure a fetch request for Charts
NSManagedObjectContext *moc = ((iPhemerisAppDelegate *)[[UIApplication sharedApplication] delegate]).coreDataUtil.pc.viewContext;
if(!moc) {
NSLog(@"*** SavedChartView MOC NOT READY");
return;
}
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Charts" inManagedObjectContext:moc];
[fetchRequest setEntity:entity];
// Create the sort descriptors array
NSSortDescriptor *nameDescriptor = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:YES selector:@selector(localizedCaseInsensitiveCompare:)];
NSSortDescriptor *chartTypeDescriptor = [[NSSortDescriptor alloc] initWithKey:@"chartType" ascending:YES selector:@selector(localizedCaseInsensitiveCompare:)];
NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:nameDescriptor, chartTypeDescriptor, nil];
[fetchRequest setSortDescriptors:sortDescriptors];
// Create and initialize the fetch results controller.
_sectionNameKeyPath = @"nameFirstLetter";
_fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:moc sectionNameKeyPath:_sectionNameKeyPath cacheName:nil];
_fetchedResultsController.delegate = self;
}
