Assertion failure when i use the Add Function

Question

In a table, I have 3 indexes which calls each a function. In each function, there is an add button that adds data into CoreData. First 2 works, but when i press the 3rd inde

Answer 1

I faced the same error. I was using the delegate of NSFetchedResultsControllerDelegate. I comment rest of the delegate except the below one.

func controllerDidChangeContent(_ controller: NSFetchedResultsController) {  
 self.tableView.reloadData()
 if self.fetchedResultsController.fetchedObjects?.count == 0 {
    } else {
  }
}

If you want to use all delegate then you need properly manage rows and section. This error occur when you don't manage rows and section properly.