IGListWorkingRangeDelegate

Objective-C

@protocol IGListWorkingRangeDelegate <NSObject>

Swift

protocol ListWorkingRangeDelegate : NSObjectProtocol

Implement this protocol to receive working range events for a list.

The working range is a range near the viewport in which you can begin preparing content for display. For example, you could begin decoding images, or warming text caches.


                    
                    
                    -listAdapter:sectionControllerWillEnterWorkingRange:

Notifies the delegate that an section controller will enter the working range.

Declaration

Objective-C

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

Swift

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

Parameters

`listAdapter`	The adapter controlling the list.
`sectionController`	The section controller entering the range.


                    
                    
                    -listAdapter:sectionControllerDidExitWorkingRange:

Notifies the delegate that an section controller exited the working range.

Declaration

Objective-C

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

Swift

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

Parameters

`listAdapter`	The adapter controlling the list.
`sectionController`	The section controller that exited the range.