Dispatch.main.asyncAfter() crash app when called before it's finished - ios

Question

so I have an app with radiobuttons to check off tasks, everything's working as expected as long as I let the animation finish but if I press two buttons at the same time I get an error:
libc++abi.dylib: terminating with uncaught exception of type NSException
The Code executed every time a radiobutton is tapped
func RadioTapped(_ cell: TableViewCell) {
if let indexPath = tableView.indexPath(for: cell) {
// Removes task from coreData
let task = self.tasks[indexPath.row]
print(tasks.count)
self.context.delete(task)
print(tasks.count)
(UIApplication.shared.delegate as! AppDelegate).saveContext()
do{
self.tasks = try self.context.fetch(TodayTask.fetchRequest())
// Animates the removal of task cell
DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(800),execute: {
self.tableView.beginUpdates()
self.tableView.deleteRows(at: [indexPath], with: .fade)
self.tableView.endUpdates()
})
} catch {
print("Fetching Failed")
}
}
}
Error Message
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 (11) must be equal to the number of rows contained in that section before the update (13), 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).'

Answer 1

Table row delete operation also requires to delete element of array of table.
According to your code, self.tasks may be an array for your table list.
Delete an element of 'self.tasks' from same indexes, for which you are deleting your rows.
Hint:
// Remove array element
self.tasks.remove(at: <index.row>)
DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(800),execute: {
self.tableView.beginUpdates()
self.tableView.deleteRows(at: [indexPath], with: .fade)
self.tableView.endUpdates()
})