IGListAdapterUpdaterDelegate Protocol Reference


                      
                      
                      -listAdapterUpdater:willPerformBatchUpdatesWithCollectionView:

Notifies the delegate that the updater will call -[UICollectionView performBatchUpdates:completion:].

Declaration

Objective-C

- (void)listAdapterUpdater:(nonnull IGListAdapterUpdater *)listAdapterUpdater
    willPerformBatchUpdatesWithCollectionView:
        (nonnull UICollectionView *)collectionView;

Swift

func listAdapterUpdater(_ listAdapterUpdater: IGListAdapterUpdater, willPerformBatchUpdatesWith collectionView: UICollectionView)

Parameters

`listAdapterUpdater`	The adapter updater owning the transition.
`collectionView`	The collection view that will perform the batch updates.


                      
                      
                      -listAdapterUpdater:didPerformBatchUpdates:collectionView:

Notifies the delegate that the updater successfully finished -[UICollectionView performBatchUpdates:completion:].

Note

This event is called in the completion block of the batch update.

Declaration

Objective-C

- (void)listAdapterUpdater:(nonnull IGListAdapterUpdater *)listAdapterUpdater
    didPerformBatchUpdates:(nonnull IGListBatchUpdateData *)updates
            collectionView:(nonnull UICollectionView *)collectionView;

Swift

func listAdapterUpdater(_ listAdapterUpdater: IGListAdapterUpdater, didPerformBatchUpdates updates: ListBatchUpdateData, collectionView: UICollectionView)

Parameters

`listAdapterUpdater`	The adapter updater owning the transition.
`updates`	The batch updates that were applied to the collection view.
`collectionView`	The collection view that performed the batch updates.


                      
                      
                      -listAdapterUpdater:willInsertIndexPaths:collectionView:

Notifies the delegate that the updater will call -[UICollectionView insertItemsAtIndexPaths:].

Note

This event is only sent when outside of -[UICollectionView performBatchUpdates:completion:].

Declaration

Objective-C

- (void)listAdapterUpdater:(nonnull IGListAdapterUpdater *)listAdapterUpdater
      willInsertIndexPaths:(nonnull NSArray<NSIndexPath *> *)indexPaths
            collectionView:(nonnull UICollectionView *)collectionView;

Swift

func listAdapterUpdater(_ listAdapterUpdater: IGListAdapterUpdater, willInsert indexPaths: [IndexPath], collectionView: UICollectionView)

Parameters

`listAdapterUpdater`	The adapter updater owning the transition.
`indexPaths`	An array of index paths that will be inserted.
`collectionView`	The collection view that will perform the insert.


                      
                      
                      -listAdapterUpdater:willDeleteIndexPaths:collectionView:

Notifies the delegate that the updater will call -[UICollectionView deleteItemsAtIndexPaths:].

Note

This event is only sent when outside of -[UICollectionView performBatchUpdates:completion:].

Declaration

Objective-C

- (void)listAdapterUpdater:(nonnull IGListAdapterUpdater *)listAdapterUpdater
      willDeleteIndexPaths:(nonnull NSArray<NSIndexPath *> *)indexPaths
            collectionView:(nonnull UICollectionView *)collectionView;

Swift

func listAdapterUpdater(_ listAdapterUpdater: IGListAdapterUpdater, willDelete indexPaths: [IndexPath], collectionView: UICollectionView)

Parameters

`listAdapterUpdater`	The adapter updater owning the transition.
`indexPaths`	An array of index paths that will be deleted.
`collectionView`	The collection view that will perform the delete.


                      
                      
                      -listAdapterUpdater:willMoveFromIndexPath:toIndexPath:collectionView:

Notifies the delegate that the updater will call -[UICollectionView moveItemAtIndexPath:toIndexPath:]

Note

This event is only sent when outside of -[UICollectionView performBatchUpdates:completion:].

Declaration

Objective-C

- (void)listAdapterUpdater:(nonnull IGListAdapterUpdater *)listAdapterUpdater
     willMoveFromIndexPath:(nonnull NSIndexPath *)fromIndexPath
               toIndexPath:(nonnull NSIndexPath *)toIndexPath
            collectionView:(nonnull UICollectionView *)collectionView;

Swift

func listAdapterUpdater(_ listAdapterUpdater: IGListAdapterUpdater, willMoveFrom fromIndexPath: IndexPath, to toIndexPath: IndexPath, collectionView: UICollectionView)

Parameters

`listAdapterUpdater`	The adapter updater owning the transition.
`fromIndexPath`	The index path of the item that will be moved.
`toIndexPath`	The index path to move the item to.
`collectionView`	The collection view that will perform the move.


                      
                      
                      -listAdapterUpdater:willReloadIndexPaths:collectionView:

Notifies the delegate that the updater will call -[UICollectionView reloadItemsAtIndexPaths:].

Note

This event is only sent when outside of -[UICollectionView performBatchUpdates:completion:].

Declaration

Objective-C

- (void)listAdapterUpdater:(nonnull IGListAdapterUpdater *)listAdapterUpdater
      willReloadIndexPaths:(nonnull NSArray<NSIndexPath *> *)indexPaths
            collectionView:(nonnull UICollectionView *)collectionView;

Swift

func listAdapterUpdater(_ listAdapterUpdater: IGListAdapterUpdater, willReload indexPaths: [IndexPath], collectionView: UICollectionView)

Parameters

`listAdapterUpdater`	The adapter updater owning the transition.
`indexPaths`	An array of index paths that will be reloaded.
`collectionView`	The collection view that will perform the reload.


                      
                      
                      -listAdapterUpdater:willReloadSections:collectionView:

Notifies the delegate that the updater will call -[UICollectionView reloadSections:].

Note

This event is only sent when outside of -[UICollectionView performBatchUpdates:completion:].

Declaration

Objective-C

- (void)listAdapterUpdater:(nonnull IGListAdapterUpdater *)listAdapterUpdater
        willReloadSections:(nonnull NSIndexSet *)sections
            collectionView:(nonnull UICollectionView *)collectionView;

Swift

func listAdapterUpdater(_ listAdapterUpdater: IGListAdapterUpdater, willReloadSections sections: IndexSet, collectionView: UICollectionView)

Parameters

`listAdapterUpdater`	The adapter updater owning the transition.
`sections`	The sections that will be reloaded
`collectionView`	The collection view that will perform the reload.


                      
                      
                      -listAdapterUpdater:willReloadDataWithCollectionView:

Notifies the delegate that the updater will call -[UICollectionView reloadData].

Declaration

Objective-C

- (void)listAdapterUpdater:(nonnull IGListAdapterUpdater *)listAdapterUpdater
    willReloadDataWithCollectionView:(nonnull UICollectionView *)collectionView;

Swift

func listAdapterUpdater(_ listAdapterUpdater: IGListAdapterUpdater, willReloadDataWith collectionView: UICollectionView)

Parameters

`listAdapterUpdater`	The adapter updater owning the transition.
`collectionView`	The collection view that will be reloaded.


                      
                      
                      -listAdapterUpdater:didReloadDataWithCollectionView:

Notifies the delegate that the updater successfully called -[UICollectionView reloadData].

Declaration

Objective-C

- (void)listAdapterUpdater:(nonnull IGListAdapterUpdater *)listAdapterUpdater
    didReloadDataWithCollectionView:(nonnull UICollectionView *)collectionView;

Swift

func listAdapterUpdater(_ listAdapterUpdater: IGListAdapterUpdater, didReloadDataWith collectionView: UICollectionView)

Parameters

`listAdapterUpdater`	The adapter updater owning the transition.
`collectionView`	The collection view that reloaded.


                      
                      
                      -listAdapterUpdater:willCrashWithException:fromObjects:toObjects:updates:

Notifies the delegate that the collection view threw an exception in -[UICollectionView performBatchUpdates:completion:].

Declaration

Objective-C

- (void)listAdapterUpdater:(nonnull IGListAdapterUpdater *)listAdapterUpdater
    willCrashWithException:(nonnull NSException *)exception
               fromObjects:(nullable NSArray *)fromObjects
                 toObjects:(nullable NSArray *)toObjects
                   updates:(nonnull IGListBatchUpdateData *)updates;

Swift

func listAdapterUpdater(_ listAdapterUpdater: IGListAdapterUpdater, willCrashWith exception: NSException, from fromObjects: [Any]?, to toObjects: [Any]?, updates: ListBatchUpdateData)

Parameters

`listAdapterUpdater`	The adapter updater owning the transition.
`exception`	The exception thrown by the collection view.
`fromObjects`	The items transitioned from in the diff, if any.
`toObjects`	The items transitioned to in the diff, if any.
`updates`	The batch updates that were applied to the collection view.