NSFetchedResultsController和节的瞬态属性

uppercaseFirstLetterOfName

NSSortDescriptor* sortByWordDescriptor = [[NSSortDescriptor alloc] 
                    initWithKey:@"subject" ascending:YES];
NSArray* sortArray = [[NSArray alloc]
                    initWithObjects:sortByWordDescriptor, nil];
[fetchRequest setSortDescriptors:sortArray];

NSFetchedResultsController* controller = [[NSFetchedResultsController alloc]
                    initWithFetchRequest:fetchRequest 
                    managedObjectContext:managedObjectContext 
                    sectionNameKeyPath:@"uppercaseFirstLetterOfName" 
                    cacheName:@"Root"];

当我更改从fetchedresultscontroller获取的持久化对象时,应该只删除节 controller:didChangeObject controller:didChangeSection 也可能被解雇。在修改持久对象以使 controller:didChangeSection 调用?

升级版本:

这是model子类中的瞬态属性getter

- (NSString *)uppercaseFirstLetterOfName 
{
    [self willAccessValueForKey:@"uppercaseFirstLetterOfName"];
    NSString *aString = [[self valueForKey:@"subject"] uppercaseString];
    NSString *stringToReturn = [aString substringWithRange:
             [aString rangeOfComposedCharacterSequenceAtIndex:0]];
    [self didAccessValueForKey:@"uppercaseFirstLetterOfName"];

    return stringToReturn;
}

...
detailViewController.unit = (ModelClass*)[fetchedResultsController 
                                    objectAtIndexPath:indexPath];
...

最后是数据修改

unit.subject = someTextField.text;
...
[unit.managedObjectContext save:&error]

对于瞬态对象,我没有其他特别的东西,所以我不会直接修改它。