void Remove(NotifyCollectionChangedEventArgs args)
{
var startIndex = args.OldStartingIndex;
if (startIndex < 0)
{
// INCC implementation isn't giving us enough information to know where the removed items were in the
// collection. So the best we can do is a complete reload
Reload();
return;
}
if (ReloadRequired())
{
Reload();
return;
}
// Removing a group will change the section index for all subsequent groups, so the easiest thing to do
// is to reset all the group tracking to get it up-to-date
ResetGroupTracking();
// Since we have a start index, we can be more clever about removing the item(s) (and get the nifty animations)
var count = args.OldItems.Count;
// Queue up the updates to the UICollectionView
Update(() => _collectionView.DeleteSections(CreateIndexSetFrom(startIndex, count)));
}
void Remove(NotifyCollectionChangedEventArgs args)
{
var startIndex = args.OldStartingIndex;
if (startIndex < 0)
{
// INCC implementation isn't giving us enough information to know where the removed items were in the
// collection. So the best we can do is a ReloadData()
Reload();
return;
}
// If we have a start index, we can be more clever about removing the item(s) (and get the nifty animations)
var count = args.OldItems.Count;
_collectionView.PerformBatchUpdates(() =>
{
_collectionView.DeleteItems(CreateIndexesFrom(startIndex, count));
if (!_grouped && _collectionView.NumberOfSections() != GroupCount)
{
// We had a non-grouped list with items, and we're removing the last one;
// we also need to remove the group it was in
_collectionView.DeleteSections(new NSIndexSet(0));
}
}, null);
}