Dispatch.main.async invalid number of rows in section - ios

Question

I'm having an issue when I check off my task to quickly, which makes the app crash and gives me error:
Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of rows in section 0. The number of rows contained in an existing section after the update (7) must be equal to the number of rows contained in that section before the update (9), 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).'
Code when radiobutton tapped
func RadioTapped(_ cell: TableViewCell) {
if let indexPath = tableView.indexPath(for: cell) {
// Removes task from coreData
let task = self.tasks[indexPath.row]
self.context.delete(task)
do {
self.tasks = try self.context.fetch(TodayTask.fetchRequest())
(UIApplication.shared.delegate as! AppDelegate).saveContext()
// Animate the removal of task cell
DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(800),execute: {
self.tableView.deleteRows(at: [indexPath], with: .fade)
})
} catch {
print("Fetching failed")
}
}
}

Answer 1

Terminating app due to uncaught exception
'NSInternalInconsistencyException', reason: 'Invalid update: invalid
number of rows in section 0. The number of rows contained in an
existing section after the update (7) must be equal to the number of
rows contained in that section before the update (9), 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).'
This crash means when you are deleting your table row. You are not updating your arrayCount for instance you have defined 8 inside your numberOfRowsInSection method then before you delete the row you will also need to update the rows count based on the rows you want to delete. Otherwise when your deleteRows will called it will also called the numberOfRowsInSection method and there count will mismatch and it will crash.