IGListAdapterDelegate

Objective-C

@protocol IGListAdapterDelegate <NSObject>

Swift

@MainActor protocol ListAdapterDelegate : NSObjectProtocol

Conform to IGListAdapterDelegate to receive display events for objects in a list.


                    
                    
                    -listAdapter:willDisplayObject:atIndex:

Notifies the delegate that a list object is about to be displayed.

Declaration

Objective-C

- (void)listAdapter:(nonnull IGListAdapter *)listAdapter
    willDisplayObject:(nonnull id)object
              atIndex:(NSInteger)index;

Swift

func listAdapter(_ listAdapter: IGListAdapter, willDisplay object: Any, at index: Int)

Parameters

`listAdapter`	The list adapter sending this information.
`object`	The object that will display.
`index`	The index of the object in the list.


                    
                    
                    -listAdapter:didEndDisplayingObject:atIndex:

Notifies the delegate that a list object is no longer being displayed.

Declaration

Objective-C

- (void)listAdapter:(nonnull IGListAdapter *)listAdapter
    didEndDisplayingObject:(nonnull id)object
                   atIndex:(NSInteger)index;

Swift

func listAdapter(_ listAdapter: IGListAdapter, didEndDisplaying object: Any, at index: Int)

Parameters

`listAdapter`	The list adapter sending this information.
`object`	The object that ended display.
`index`	The index of the object in the list.


                    
                    
                    -listAdapter:willDisplayObject:cell:atIndexPath:

Notifies the delegate that a list object is about to be displayed. This method is distinct from willDisplayObject:atIndex because this method gets called whenever a cell will be displayed on screen as opposed to willDisplayObject:atIndex which only gets called for once per section.

Declaration

Objective-C

- (void)listAdapter:(nonnull IGListAdapter *)listAdapter
    willDisplayObject:(nonnull id)object
                 cell:(nonnull UICollectionViewCell *)cell
          atIndexPath:(nonnull NSIndexPath *)indexPath;

Swift

func listAdapter(_ listAdapter: IGListAdapter, willDisplay object: Any, cell: UICollectionViewCell, at indexPath: IndexPath)

Parameters

`listAdapter`	The list adapter sending this information.
`object`	The object that will display.
`cell`	The cell which contains the object that will display.
`indexPath`	The index path of the object in the list.


                    
                    
                    -listAdapter:didEndDisplayingObject:cell:atIndexPath:

Notifies the delegate that a list object is no longer being displayed. This method is distinct from didEndDisplayingObject:atIndex because this method gets called whenever a cell ends display on screen as opposed to didEndDisplayingObject:atIndex which only gets called once when the section fully ends display.

Declaration

Objective-C

- (void)listAdapter:(nonnull IGListAdapter *)listAdapter
    didEndDisplayingObject:(nonnull id)object
                      cell:(nonnull UICollectionViewCell *)cell
               atIndexPath:(nonnull NSIndexPath *)indexPath;

Swift

func listAdapter(_ listAdapter: IGListAdapter, didEndDisplaying object: Any, cell: UICollectionViewCell, at indexPath: IndexPath)

Parameters

`listAdapter`	The list adapter sending this information.
`object`	The object that ended display.
`cell`	The cell which contains the object that ended display.
`indexPath`	The index path of the object in the list.