All Known Implementing Classes:

UICollectionViewController, UICollectionViewDiffableDataSource
```
public interface UICollectionViewDataSource
```

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default boolean`	`collectionViewCanMoveItemAtIndexPath(UICollectionView collectionView, NSIndexPath indexPath)`
`UICollectionViewCell`	`collectionViewCellForItemAtIndexPath(UICollectionView collectionView, NSIndexPath indexPath)`	The cell that is returned must be retrieved from a call to -dequeueReusableCellWithReuseIdentifier:forIndexPath:
`default NSIndexPath`	`collectionViewIndexPathForIndexTitleAtIndex(UICollectionView collectionView, java.lang.String title, long index)`	Returns the index path that corresponds to the given title / index.
`default void`	`collectionViewMoveItemAtIndexPathToIndexPath(UICollectionView collectionView, NSIndexPath sourceIndexPath, NSIndexPath destinationIndexPath)`
`long`	`collectionViewNumberOfItemsInSection(UICollectionView collectionView, long section)`
`default UICollectionReusableView`	`collectionViewViewForSupplementaryElementOfKindAtIndexPath(UICollectionView collectionView, java.lang.String kind, NSIndexPath indexPath)`	The view that is returned must be retrieved from a call to -dequeueReusableSupplementaryViewOfKind:withReuseIdentifier:forIndexPath:
`default NSArray<java.lang.String>`	`indexTitlesForCollectionView(UICollectionView collectionView)`	Returns a list of index titles to display in the index view (e.g.
`default long`	`numberOfSectionsInCollectionView(UICollectionView collectionView)`

Method Detail

collectionViewCanMoveItemAtIndexPath

default boolean collectionViewCanMoveItemAtIndexPath(UICollectionView collectionView,
                                                     NSIndexPath indexPath)

collectionViewCellForItemAtIndexPath

UICollectionViewCell collectionViewCellForItemAtIndexPath(UICollectionView collectionView,
                                                          NSIndexPath indexPath)

The cell that is returned must be retrieved from a call to -dequeueReusableCellWithReuseIdentifier:forIndexPath:

collectionViewMoveItemAtIndexPathToIndexPath

default void collectionViewMoveItemAtIndexPathToIndexPath(UICollectionView collectionView,
                                                          NSIndexPath sourceIndexPath,
                                                          NSIndexPath destinationIndexPath)

collectionViewNumberOfItemsInSection

long collectionViewNumberOfItemsInSection(UICollectionView collectionView,
                                          long section)

collectionViewViewForSupplementaryElementOfKindAtIndexPath

default UICollectionReusableView collectionViewViewForSupplementaryElementOfKindAtIndexPath(UICollectionView collectionView,
                                                                                            java.lang.String kind,
                                                                                            NSIndexPath indexPath)

The view that is returned must be retrieved from a call to -dequeueReusableSupplementaryViewOfKind:withReuseIdentifier:forIndexPath:

numberOfSectionsInCollectionView

default long numberOfSectionsInCollectionView(UICollectionView collectionView)

collectionViewIndexPathForIndexTitleAtIndex

default NSIndexPath collectionViewIndexPathForIndexTitleAtIndex(UICollectionView collectionView,
                                                                java.lang.String title,
                                                                long index)

Returns the index path that corresponds to the given title / index. (e.g. "B",1) Return an index path with a single index to indicate an entire section, instead of a specific item.

indexTitlesForCollectionView
```
default NSArray<java.lang.String> indexTitlesForCollectionView(UICollectionView collectionView)
```
Returns a list of index titles to display in the index view (e.g. ["A", "B", "C" ... "Z", "#"])

Interface UICollectionViewDataSource