Swift show/hide loading indicator at the bottom of the list. Great for paging.

TableViewExtensions.swift

import UIKit

extension UITableView {
  func showLoadingFooter() {
    let spinner = UIActivityIndicatorView(style: .gray)
    spinner.startAnimating()
    spinner.frame = CGRect(x: CGFloat(0), y: CGFloat(0), width: self.bounds.width, height: CGFloat(44))

    self.tableFooterView = spinner
    self.tableFooterView?.isHidden = false
  }
  
  func hideLoadingFooter() {
    self.tableFooterView?.isHidden = true
    self.tableFooterView = nil 
  }
}