Swift tableview 单元格分割线显示不全的解决方法

if aboutTable.respondsToSelector("setSeparatorInset:"){
aboutTable.separatorInset = UIEdgeInsetsZero
}
if aboutTable.respondsToSelector("setLayoutMargins:"){
aboutTable.layoutMargins = UIEdgeInsetsZero
}

func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
if cell.respondsToSelector("setLayoutMargins:"){
cell.layoutMargins = UIEdgeInsetsZero
}
if cell.respondsToSelector("setSeparatorInset:"){
cell.separatorInset = UIEdgeInsetsZero
}
}