UITableView extra space at bottom

Question

My tableview has an extra space at the bottom, as you see in the picture:

All the rows in the tableView have a fixed height of 71pt.

Answer 1

My problem didn't solve by the answers. i had a UISearchbar as tableHeaderView which caused the white space ( i don't know why) . I removed the searchbar from tableview in storyboard and in viewWillLayoutSubviews added in table header then problem solved.

override func viewWillLayoutSubviews() {
    super.viewWillLayoutSubviews()
    tableView.tableHeaderView = searchBar
}