apple.uikit.protocol

Interface UICollectionViewDropPlaceholderContext

All Superinterfaces:

UIDragAnimating

public interface UICollectionViewDropPlaceholderContext
extends UIDragAnimating

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	UICollectionViewDropPlaceholderContext.Block_commitInsertionWithDataSourceUpdates

Nested classes/interfaces inherited from interface apple.uikit.protocol.UIDragAnimating

UIDragAnimating.Block_addAnimations, UIDragAnimating.Block_addCompletion

Method Summary

Modifier and Type	Method and Description
boolean	commitInsertionWithDataSourceUpdates(UICollectionViewDropPlaceholderContext.Block_commitInsertionWithDataSourceUpdates dataSourceUpdates) Exchange the placeholder for the final cell.
boolean	deletePlaceholder() If the placeholder is no longer needed or you wish to manually insert a cell for the drop data, you can remove the placeholder via this method.
UIDragItem	dragItem() Retrieve drop data from the dragItem's itemProvider.
void	setNeedsCellUpdate() Call this method to request an update of the placeholder cell's content via the updateCellHandler.

Methods inherited from interface apple.uikit.protocol.UIDragAnimating

addAnimations, addCompletion

Method Detail

commitInsertionWithDataSourceUpdates

boolean commitInsertionWithDataSourceUpdates(UICollectionViewDropPlaceholderContext.Block_commitInsertionWithDataSourceUpdates dataSourceUpdates)

Exchange the placeholder for the final cell. You are only responsible for updating your data source inside the block using the provided insertionIndexPath. If the placeholder is no longer available (e.g. -reloadData has been called) the dataSourceUpdates block will not be executed and this will return NO.

deletePlaceholder

boolean deletePlaceholder()

If the placeholder is no longer needed or you wish to manually insert a cell for the drop data, you can remove the placeholder via this method. If the placeholder is no longer available (e.g. -reloadData has been called) this will return NO.

dragItem

UIDragItem dragItem()

Retrieve drop data from the dragItem's itemProvider.

setNeedsCellUpdate

void setNeedsCellUpdate()

Call this method to request an update of the placeholder cell's content via the updateCellHandler. This will only be called if the placeholder is visible. If the placeholder becomes visible via scrolling, the updateCellHandler will automatically be called.