新行点击编辑按钮，在UITableViewin swift。

I am trying to get a new row in bottom like "insert new cell" with plus button on left in UITableView when user clicks on edit button and goes away when user clicks on done button. Right now I getting plus button on the last row of table view but I am not able to add dynamically a new row. Can anyone help what should I do or is their any better way to do this?I am trying to get a new row in bottom like "in