iOS: Remove UITableViewCell separator line indentation

ios-remove-uitableviewcell-seperatorline-indentation

    override func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
 
        // for removing the leading margin of the tableview cell's separator line (i.e. the separator is drawn across the entire screen)
        if (tableView.respondsToSelector("setSeparatorInset:")) {
            tableView.separatorInset = UIEdgeInsetsZero
        }
        
        if (tableView.respondsToSelector("setLayoutMargins:")) {
            tableView.layoutMargins = UIEdgeInsetsZero
        }

        if (cell.respondsToSelector("setLayoutMargins:")) {
            cell.layoutMargins = UIEdgeInsetsZero
        }
    }