Invalid update invalid number of rows in section 0

Question

I ve read all of the related posts regarding this and I am still having an error    Invalid update  invalid number of rows in section 0   The number of rows contained in an existing section after the update  5  must be equal to the number of rows contained in that section before the update  5   plus or minus the number of rows inserted or deleted from that section  0 inserted  1 deleted  and plus or minus the number of rows moved into or out of that section  0 moved in  0 moved out      Here are the details   in  h I have an NSMutableArray    property  strong nonatomic  NSMutableArray  currentCart    In  m my numberOfRowsInSection looks like this   -  NSInteger tableView  UITableView   tableView numberOfRowsInSection  NSInteger section          Return the number of rows in the section        return   currentCart count         To enable delete and remove the object from the array      Editing of rows is enabled -  void tableView  UITableView   tableView commitEditingStyle  UITableViewCellEditingStyle editingStyle forRowAtIndexPath  NSIndexPath   indexPath       if  editingStyle    UITableViewCellEditingStyleDelete               when delete is tapped          tableView deleteRowsAtIndexPaths  NSArray arrayWithObject indexPath  withRowAnimation UITableViewRowAnimationFade             currentCart removeObjectAtIndex indexPath row               I thought that by having my number of sections relying on the count of the array I m editing it would ensure the proper number of rows  Can t this be done without having to reload the table when you delete a row anyway

User · Answer

Swift Version --  Remove the object from your data array before you call   func tableView   tableView  UITableView  commit editingStyle  UITableViewCellEditingStyle  forRowAt indexPath  IndexPath        if editingStyle     delete           print  Deleted            currentCart remove at  indexPath row    Remove element from your array          self tableView deleteRows at   indexPath   with   automatic

User · Answer

Here is some code from above added with actual action code  point 1 and 2    func tableView   tableView  UITableView  trailingSwipeActionsConfigurationForRowAt indexPath  IndexPath  - gt  UISwipeActionsConfiguration        let deleteAction   UIContextualAction style   destructive  title   Delete           completionHandler in             1  remove object from your array         scannedItems remove at  indexPath row             2  reload the table  otherwise you get an index out of bounds crash         self tableView reloadData            completionHandler true            deleteAction backgroundColor    systemOrange     let configuration   UISwipeActionsConfiguration actions   deleteAction       configuration performsFirstActionWithFullSwipe   true     return configuration

User · Answer

You need to remove the object from your data array before you call deleteRowsAtIndexPaths withRowAnimation   So  your code should look like this      Editing of rows is enabled -  void tableView  UITableView   tableView commitEditingStyle  UITableViewCellEditingStyle editingStyle forRowAtIndexPath  NSIndexPath   indexPath       if  editingStyle    UITableViewCellEditingStyleDelete               when delete is tapped          currentCart removeObjectAtIndex indexPath row             tableView deleteRowsAtIndexPaths  NSArray arrayWithObject indexPath  withRowAnimation UITableViewRowAnimationFade             You can also simplify your code a little by using the array creation shortcut        tableView deleteRowsAtIndexPaths   indexPath  withRowAnimation UITableViewRowAnimationFade

User · Answer

In my case issue was that numberOfRowsInSection was returning similar number of rows after calling tableView deleteRows        Since this was the required behaviour in my case  I ended up calling tableView reloadData   instead of tableView deleteRows      in cases where numberOfRowsInSection will remain same after deleting a row

[ios] 'Invalid update: invalid number of rows in section 0

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