I need to know when reloading a UICollectionView has completed in order to configure cells afterwards (because I am not the data source for the cells – other wise would have done it already…)
I've tried code such as
[self.collectionView reloadData];
[self configure cells]; // BOOM! cells are nil
I've also tried using
[self.collectionView performBatchUpdates:^{
[self.collectionView reloadData];
} completion:^(BOOL finished) {
// notify that completed and do the configuration now
}];
but when I reload the data I am getting crashes.
How can I reload the data into the collection, and only when it has finished reloading – do a particular completion handler
Best Answer
This is caused by cells being added during layoutSubviews not at reloadData. Since layoutSubviews is performed during next run loop pass after reloadData your cells are empty. Try doing this:
I had similar issue and resolved it this way.