IGListDisplayDelegate

Objective-C

@protocol IGListDisplayDelegate <NSObject>

Swift

protocol ListDisplayDelegate : NSObjectProtocol

Implement this protocol to receive display events for a section controller when it is on screen.


                    
                    
                    -listAdapter:willDisplaySectionController:

Tells the delegate that the specified section controller is about to be displayed.

Declaration

Objective-C

- (void)listAdapter:(nonnull IGListAdapter *)listAdapter
    willDisplaySectionController:
        (nonnull IGListSectionController *)sectionController;

Swift

func listAdapter(_ listAdapter: IGListAdapter, willDisplay sectionController: IGListSectionController)

Parameters

`listAdapter`	The list adapter for the section controller.
`sectionController`	The section controller about to be displayed.


                    
                    
                    -listAdapter:didEndDisplayingSectionController:

Tells the delegate that the specified section controller is no longer being displayed.

Declaration

Objective-C

- (void)listAdapter:(nonnull IGListAdapter *)listAdapter
    didEndDisplayingSectionController:
        (nonnull IGListSectionController *)sectionController;

Swift

func listAdapter(_ listAdapter: IGListAdapter, didEndDisplaying sectionController: IGListSectionController)

Parameters

`listAdapter`	The list adapter for the section controller.
`sectionController`	The section controller that is no longer displayed.


                    
                    
                    -listAdapter:willDisplaySectionController:cell:atIndex:

Tells the delegate that a cell in the specified list is about to be displayed.

Declaration

Objective-C

- (void)listAdapter:(nonnull IGListAdapter *)listAdapter
    willDisplaySectionController:
        (nonnull IGListSectionController *)sectionController
                            cell:(nonnull UICollectionViewCell *)cell
                         atIndex:(NSInteger)index;

Swift

func listAdapter(_ listAdapter: IGListAdapter, willDisplay sectionController: IGListSectionController, cell: UICollectionViewCell, at index: Int)

Parameters

`listAdapter`	The list adapter in which the cell will display.
`sectionController`	The section controller that is displaying the cell.
`cell`	The cell about to be displayed.
`index`	The index of the cell in the section.


                    
                    
                    -listAdapter:didEndDisplayingSectionController:cell:atIndex:

Tells the delegate that a cell in the specified list is no longer being displayed.

Declaration

Objective-C

- (void)listAdapter:(nonnull IGListAdapter *)listAdapter
    didEndDisplayingSectionController:
        (nonnull IGListSectionController *)sectionController
                                 cell:(nonnull UICollectionViewCell *)cell
                              atIndex:(NSInteger)index;

Swift

func listAdapter(_ listAdapter: IGListAdapter, didEndDisplaying sectionController: IGListSectionController, cell: UICollectionViewCell, at index: Int)

Parameters

`listAdapter`	The list adapter in which the cell was displayed.
`sectionController`	The section controller that is no longer displaying the cell.
`cell`	The cell that is no longer displayed.
`index`	The index of the cell in the section.