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(@NotNull UICollectionView collectionView, @NotNull NSIndexPath indexPath)`	API-Since: 9.0
`@NotNull UICollectionViewCell`	`collectionViewCellForItemAtIndexPath(@NotNull UICollectionView collectionView, @NotNull NSIndexPath indexPath)`	The cell that is returned must be retrieved from a call to -dequeueReusableCellWithReuseIdentifier:forIndexPath:
`default @NotNull NSIndexPath`	`collectionViewIndexPathForIndexTitleAtIndex(@NotNull UICollectionView collectionView, @NotNull java.lang.String title, long index)`	Returns the index path that corresponds to the given title / index.
`default void`	`collectionViewMoveItemAtIndexPathToIndexPath(@NotNull UICollectionView collectionView, @NotNull NSIndexPath sourceIndexPath, @NotNull NSIndexPath destinationIndexPath)`	API-Since: 9.0
`long`	`collectionViewNumberOfItemsInSection(@NotNull UICollectionView collectionView, long section)`
`default @NotNull UICollectionReusableView`	`collectionViewViewForSupplementaryElementOfKindAtIndexPath(@NotNull UICollectionView collectionView, @NotNull java.lang.String kind, @NotNull NSIndexPath indexPath)`	The view that is returned must be retrieved from a call to -dequeueReusableSupplementaryViewOfKind:withReuseIdentifier:forIndexPath:
`default @Nullable NSArray<java.lang.String>`	`indexTitlesForCollectionView(@NotNull UICollectionView collectionView)`	Returns a list of index titles to display in the index view (e.g.
`default long`	`numberOfSectionsInCollectionView(@NotNull UICollectionView collectionView)`

Method Detail

collectionViewCanMoveItemAtIndexPath

default boolean collectionViewCanMoveItemAtIndexPath(@NotNull
                                                     @NotNull UICollectionView collectionView,
                                                     @NotNull
                                                     @NotNull NSIndexPath indexPath)

API-Since: 9.0

collectionViewCellForItemAtIndexPath

@NotNull
@NotNull UICollectionViewCell collectionViewCellForItemAtIndexPath(@NotNull
                                                                   @NotNull UICollectionView collectionView,
                                                                   @NotNull
                                                                   @NotNull NSIndexPath indexPath)

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

collectionViewMoveItemAtIndexPathToIndexPath

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

API-Since: 9.0

collectionViewNumberOfItemsInSection

long collectionViewNumberOfItemsInSection(@NotNull
                                          @NotNull UICollectionView collectionView,
                                          long section)

collectionViewViewForSupplementaryElementOfKindAtIndexPath

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

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

numberOfSectionsInCollectionView

default long numberOfSectionsInCollectionView(@NotNull
                                              @NotNull UICollectionView collectionView)

collectionViewIndexPathForIndexTitleAtIndex

@NotNull
default @NotNull NSIndexPath collectionViewIndexPathForIndexTitleAtIndex(@NotNull
                                                                         @NotNull UICollectionView collectionView,
                                                                         @NotNull
                                                                         @NotNull 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. API-Since: 14.0

indexTitlesForCollectionView

@Nullable
default @Nullable NSArray<java.lang.String> indexTitlesForCollectionView(@NotNull
                                                                         @NotNull UICollectionView collectionView)

Returns a list of index titles to display in the index view (e.g. ["A", "B", "C" ... "Z", "#"]) API-Since: 14.0

Interface UICollectionViewDataSource