I am using PerformBatchUpdate for deleting a single collectionView Cell, The problem is if I try to delete the first cell (row 0) it successfully deletes that but if I again try to delete the first cell (updated cell which was at row 1, now at row 0) it deletes the cell which is currently at row 1 instead of deleting the cell at row 0.
Note - please suggest the answer using PerformBatchUpdate ONLY.
Am using this code
private var movieViewModels = [movieViewModel]()
Collection view protocols
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
if isFiltering{
return filteredMovies.count
}
return movieViewModels.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if isFiltering{
return customiseCell(Arr: filteredMovies, index: indexPath, collectionView: collectionView)
}else{
return customiseCell(Arr: movieViewModels, index: indexPath, collectionView: collectionView)
}
}
Code for deleting cell
func deleteMoviewhenFilterOFF(index:IndexPath){
self.movieViewModels.remove(at: index.row)
self.clctnView.performBatchUpdates {
self.clctnView.deleteItems(at: [index])
} completion: { success in
print("successfully updated")
}
}
NOTE :- It works fine if I reload the collection view in BatchUpdate using the below code but I think PerformBatchUpdate does this automatically its not recommended to reload the collection view in batch update
func deleteMoviewhenFilterOFF(index:IndexPath){
self.movieViewModels.remove(at: index.row)
self.clctnView.performBatchUpdates {
self.clctnView.deleteItems(at: [index])
} completion: { success in
print("successfully updated")
self.clctnView.reloadData()
}
}
