EXC_BAD_ACCESS (code=EXC_I386_GPFLT) when deleteRows(at: [IndexPath]) - ios

Question

I'm developing an app which has a main tableview in home screen. When I tap on a certain type of cell of the tableview, I do a little animation and then I delete the cell. I tried the behaviour on all simulator. Only on 4,7" and 5,5" I get a crash when I try to delete a certain row, systematically. I can't understand the error, since Xcode only says: EXC_BAD_ACCESS (code=EXC_I386_GPFLT)
This is my code:
tableView.deselectRow(at: indexPath, animated: false)
let incomingReminderTableViewCell = cell as! IncomingReminderTableViewCell
self.tableView.isUserInteractionEnabled = false
incomingReminderTableViewCell.completeReminderAt(indexPath: indexPath) { (indexPath) in
let selectedReminder = self.incomingReminders.reversed()[indexPath.row-1]
if CoreDataManager.sharedInstance.delete(selectedReminder) {
UserNotificationManager.decreaseBadge()
UserNotificationManager.deleteNotificationsWith(identifiers: [selectedReminder.idNotification])
self.incomingReminders = self.incomingReminders.reversed()
self.incomingReminders.remove(at: indexPath.row-1)
self.incomingReminders = self.incomingReminders.reversed()
if self.incomingReminders.isEmpty {
UIView.animate(withDuration: 0.2, animations: {
incomingReminderTableViewCell.alpha = 0.0
}, completion: { (disappeared) in
self.tableView.reloadRows(at: [indexPath], with: .fade )
self.tableView.isUserInteractionEnabled = true
})
} else {
UIView.animate(withDuration: 0.2, animations: {
incomingReminderTableViewCell.alpha = 0.0
}, completion: { (disappeared) in
self.tableView.isUserInteractionEnabled = true
self.tableView.deleteRows(at: [indexPath], with: .right) // HERE THE CRASH
self.incomingReminders = CoreDataManager.sharedInstance.getIncomingReminders()
if self.incomingReminders.count == 5 {
Timer.scheduledTimer(withTimeInterval: 0.5, repeats: false, block: { (timer) in
self.tableView.insertRows(at: [IndexPath(row: self.incomingReminders.count, section: 0)], with: .fade)
timer.invalidate()
})
}
})
}
} else {
self.tableView.isUserInteractionEnabled = true
}
}
When app crash I have indexPath = (row: 3, section: 0), that is right. DataSource has been correctly updated, before deleteRows I have two element in the array and the data in the tableview start at indexPath = (row: 1, section: 0). Can't find a solution.

Answer 1

Not so convinced, but I've solved in this way:
tableView.performBatchUpdates({
tableView.deleteRows(at: [indexPath], with: .right)
}, completion: { (deleted) in
tableView.reloadData()
self.tableView.isUserInteractionEnabled = true
self.incomingReminders = CoreDataManager.sharedInstance.getIncomingReminders()
if self.incomingReminders.count == 5 {
Timer.scheduledTimer(withTimeInterval: 0.5, repeats: false, block: { (timer) in
self.tableView.beginUpdates()
self.tableView.insertRows(at: [IndexPath(row: self.incomingReminders.count, section: 0)], with: .fade)
self.tableView.endUpdates()
timer.invalidate()
})
}
})
The problem is after deleted a certain number of rows in tableview, it remained dirty. In fact, deleting a bunch of rows, scrolling, and then continuing to delete, crash didn't happen. I needed to reload data. I put
tableView.deleteRows(at: [indexPath], with: .right)
as a batch update. And in completion block I called the reload, with other things. All seems ok for now. Hope this can be useful for someone.