IGListScrollDelegate

@protocol IGListScrollDelegate <NSObject>

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

  • Tells the delegate that the section controller was scrolled on screen.

    Declaration

    Objective-C

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

    Swift

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

    Parameters

    listAdapter

    The list adapter whose collection view was scrolled.

    sectionController

    The visible section controller that was scrolled.

  • Tells the delegate that the section controller will be dragged on screen.

    Declaration

    Objective-C

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

    Swift

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

    Parameters

    listAdapter

    The list adapter whose collection view will drag.

    sectionController

    The visible section controller that will drag.

  • Tells the delegate that the section controller did end dragging on screen.

    Declaration

    Objective-C

    - (void)listAdapter:(nonnull IGListAdapter *)listAdapter
        didEndDraggingSectionController:
            (nonnull IGListSectionController *)sectionController
                         willDecelerate:(BOOL)decelerate;

    Swift

    func listAdapter(_ listAdapter: IGListAdapter, didEndDragging sectionController: IGListSectionController, willDecelerate decelerate: Bool)

    Parameters

    listAdapter

    The list adapter whose collection view ended dragging.

    sectionController

    The visible section controller that ended dragging.

    decelerate

    ‘Yes’ if the scrolling movement will continue, but decelerate, after a touch-up gesture during a dragging operation. If the value is ‘No’, scrolling stops immediately upon touch-up.

  • Tells the delegate that the section controller did end decelerating on screen.

    Note

    This method is @optional until the next breaking-change release.

    Declaration

    Objective-C

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

    Swift

    optional func listAdapter(_ listAdapter: IGListAdapter, didEndDeceleratingSectionController sectionController: IGListSectionController)

    Parameters

    listAdapter

    The list adapter whose collection view ended decelerating.

    sectionController

    The visible section controller that ended decelerating.