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iphonecore-datansmanagedobjectcontext

How to get all entries of a NSFetchedResultsController/NSManagedObjectContext?

I have a nice working iphone app that works with core data. I use a NSFetchedResultsController/NSManagedObjectContext as described in various tutorials.

Now I want to extends my app and add some more features. The problem I need to build up an array with objects that have informations from my data.

I somehow need to get a list of all data I have in my context.

I thought I could make an approach similar to the way I get the data for the UITableView.

id <NSFetchedResultsSectionInfo> sectionInfo = [[_fetchedResultsController sections] objectAtIndex:section];

This one fails, because I do have actually multiple sections. Now I could go through all sections and make my own IndexPath to access my data with :

MyData *info = [_fetchedResultsController objectAtIndexPath:indexPath];

But I think there is another way I just have not found yet and I hope someone can help me out here.

Thanks a lot.

Solution

  • are you just looking for a method to get all objects from you NSFetchedResultsController? If so, use this.

    NSArray *fetchedData = [_fetchedResultsController fetchedObjects];

    if you have more than 1 entity build a fetchrequest for each entity. Something like this should give you all your objects. 

    NSFetchRequest *request = [[[NSFetchRequest alloc] init] autorelease];
NSEntityDescription *entity = [NSEntityDescription entityForName:self.entityName inManagedObjectContext:self.managedObjectContext];
[request setEntity:entity];
NSError *error;
NSArray *results = [self.managedObjectContext executeFetchRequest:request error:&error];