Open Radar

 
Summary:
There is very little chance that cellForItemAtIndexPath: will actually return an instance of UICollectionViewCell, as for most uses cases one will subclass it to customize the UI.
So right now, we need to cast the return value of this method everywhere it's used. Using "__kindof" would remove the need to add theses cast.

-[UICollectionView collectionView:cellForItemAtIndexPath:] aleady uses the __kindof annotation, as is -[UITableView cellForRowAtIndexPath:].

Steps to Reproduce:
1. Register a custom subclass of UICollectionViewCell to be used in a UICollectionView
2. Use the method cellForItemAtIndexPath: to retrieve a cell, and store it in a variable of your subclass' type

 Eg . MyCellSubclass *cell = [myCollectionView cellForItemAtIndexPath:indexPath];

Expected Results:
No compiler error is produced

Actual Results:
The compiler produces the error "Incompatible pointer types initializing 'MyCellSubclass *' with an expression of type 'UICollectionViewCell * _Nullable'" 

Version:
iOS 10+

Notes: