# `BCCollectionViewDelegate collectionView:didDeselectItem:withViewController:`

*Instance Method*

## Declaration

```swift
optional func collectionView(_ collectionView: BCCollectionView!, didDeselectItem anItem: Any!, with viewController: NSViewController!)
```

```objc
- (void) collectionView:(BCCollectionView *) collectionView didDeselectItem:(id) anItem withViewController:(NSViewController *) viewController;
```

```python
collectionView_didDeselectItem_withViewController_(collectionView: BCCollectionView, anItem: object, viewController: NSViewController)
```