Call moveRowAt method in didSelectRowAt?

Question

Is there a way that you can call

func tableView(_ tableView: UITableView, moveRowAt fromIndexPath: IndexPath, to toIndexPath: IndexPath) {

   let affectedEvent = arrayMoved[fromIndexPath.row]
        arrayMoved.remove(at: fromIndexPath.row)
        arrayMoved.insert(affectedEvent, at: toIndexPath.row) }

in

  func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath){}

score 0 · Accepted Answer · edited May 23 '17 at 11:46

0

tableView(_:moveRowAt:to:) is a delegate method, meaning it is a method that you should implement and let the system call you, not the other way around — normally you should not call a delegate method yourself.

If you want to tell the system to move a row, simply call moveRow(at:to:) of the table view, e.g.

func tableView(_ tableView: UITableView, didSelectRowAt ip: IndexPath) {
    tableView.moveRow(at: ip, to: IndexPath(row: 0, section: ip.section))
}

After communicating with OP, want OP actually wants to reorder the model to push the selected item to the end. The typical way to do this is something like:

func tableView(_ tableView: UITableView, didSelectRowAt ip: IndexPath) {
    // update the model.
    model[ip.row].value = maxOfValue + 1
    sortModelAgain()

    // reload the model (note: no animation if using this)
    tableView.reloadData()
}

or, if you'd like to manually keep the view and model in sync:

func tableView(_ tableView: UITableView, didSelectRowAt ip: IndexPath) {
    // update the model.
    model[ip.row].value = maxOfValue + 1
    sortModelAgain()

    // change the view to keep in sync of data.
    tableView.beginUpdates()
    let endRow = tableView.numberOfRows(inSection: ip.section) - 1
    tableView.moveRow(at: ip, to: IndexPath(row: endRow, section: ip.section))
    tableView.endUpdates()
}

edited May 23 '17 at 11:46

Community

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answered Mar 31 '17 at 15:12

kennytm

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@Coder221 What do you want to fill `fromIndexPath` and `toIndexPath` in the `didSelectRowAt:`? – kennytm Mar 31 '17 at 15:31
I like to fill toIndexPath – Coder221 Mar 31 '17 at 15:32
@Coder221 So what should `fromIndexPath` be? – kennytm Mar 31 '17 at 15:33
fromIndexPath is when you select the row, then you remove it when it is moved programmatically and replace it with toIndexPath – Coder221 Mar 31 '17 at 15:35
OK so what should `toIndexPath` be? – kennytm Mar 31 '17 at 15:35
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/139610/discussion-between-coder221-and-kennytm). – Coder221 Mar 31 '17 at 15:35

Call moveRowAt method in didSelectRowAt?

1 Answers1