https://github.com/pronebird/uicollectionview-nsfetchedresultscontroller

A simple category on UICollectionView to perform content changes in UITableView fashion. Comes handy with NSFetchedResultsController.
https://github.com/pronebird/uicollectionview-nsfetchedresultscontroller

Last synced: 30 days ago
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A simple category on UICollectionView to perform content changes in UITableView fashion. Comes handy with NSFetchedResultsController.

• Host: GitHub
• URL: https://github.com/pronebird/uicollectionview-nsfetchedresultscontroller
• Owner: pronebird
• Created: 2014-04-21T11:10:23.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2014-08-05T20:53:02.000Z (over 10 years ago)
• Last Synced: 2023-03-15T11:45:23.041Z (over 1 year ago)
• Language: Objective-C
• Homepage:
• Size: 215 KB
• Stars: 9
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
UICollectionView-NSFetchedResultsController

=================================

A simple category on UICollectionView to perform content changes in UITableView fashion. Comes handy with NSFetchedResultsController. 

Each `-[UICollectionView beginUpdates]` must be balanced with `-[UICollectionView endUpdatesWithCompletion:]`. You can do any changes to UICollectionView in between.

Example use case with NSFetchedResultsController:

```objective-c

- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller {

	[self.collectionView beginUpdates];

}

- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller {

	[self.collectionView endUpdatesWithCompletion:^(BOOL finished) {}];

}

- (void)controller:(NSFetchedResultsController *)controller 

   didChangeObject:(id)anObject 

       atIndexPath:(NSIndexPath *)indexPath 

     forChangeType:(NSFetchedResultsChangeType)type 

      newIndexPath:(NSIndexPath *)newIndexPath 

{

	switch(type) {

		case NSFetchedResultsChangeInsert:

			[self.collectionView insertItemsAtIndexPaths:@[ newIndexPath ]];

			break;

		case NSFetchedResultsChangeDelete:

			[self.collectionView deleteItemsAtIndexPaths:@[ indexPath ]];

			break;

		case NSFetchedResultsChangeMove:

			[self.collectionView moveItemAtIndexPath:indexPath toIndexPath:newIndexPath];

			break;

		case NSFetchedResultsChangeUpdate:

			[self.collectionView reloadItemsAtIndexPaths:@[ indexPath ]];

			break;

		}

}

```