iOS 11 UITableView isEditing flag not set correctly

Question

I have a very weird issue using the iOS 11 SDK. When setting the editing flag of a UITableView on iOS 11 devices and simulators to false after deleting a cell using the swipe gesture, it still stays true the next line after set. On iOS 10 devices and below the flag is set correclty to false. Please have a look at this short example.

func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool {
    return true
}

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let cell: UITableViewCell = tableView.dequeueReusableCell(withIdentifier: cellReuseIdentifier) as UITableViewCell!
    return cell
}

func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCellEditingStyle, forRowAt indexPath: IndexPath) {
    if editingStyle == .delete {
        tableView.deleteRows(at: [indexPath], with: .fade)
        endEditingMode()
    }
}

func endEditingMode() {
    tableView.setEditing(false, animated: true)

    // Here we expect `isEditing = false` since it is set the line before but it is still `true` on iOS 11 devices
    // On <= iOS 10 devices however its `false`
    print(tableView.isEditing)
}

Anyone experiencing similar issues and probably knows how to solve this? I have already created a radar for apple.

Answer 1

I had similar problem and tried to solve it with delayed dispatch to the main thread and kept on reducing time to see if it makes sense. I have ended up having this:

DispatchQueue.main.async(execute: {
   self.tableView.setEditing(false, animated: true)
})

Solves the issue though you have a little weird delete animation afterwards, presumably due to the fact of the switching state of the tableView and some internal race condition in iOS 11 SDK.