Select items programmatically in UICollectionView

Question

I have a UICollectionViewController:

- (NSInteger)collectionView:(UICollectionView *)collectionView 
     numberOfItemsInSection:(NSInteger)sect         


        

Answer 1

For right behaviour call 4 function in a row:

// Deselect
self.collection.deselectItem(at: previousPath, animated: true)
self.collectionView(self.collection, didDeselectItemAt: previousPath)

// Select
self.collection.selectItem(at: path, animated: true, scrollPosition: .centeredVertically)
self.collectionView(self.collection, didSelectItemAt: path)