UITableView extension wich allow to keep content view at the bottom of the cells.

UITableView+insertScroll.swift

//
//  UITableView+insertScroll.swift
//
//  Created by mtournier on 13/09/17.
//  NO Copyright !!!
//

import UIKit

extension UITableView {
    
    func insertRowsWithScroll(at indexPath:IndexPath){
        
        let visiblePaths = self.indexPathsForVisibleRows
        
        var bottomPath = visiblePaths?.last
        
        let bRow = bottomPath?.row
        let bSection = bottomPath?.section
        
        let row = indexPath.row
        let section = indexPath.section
        
        let nextRowInSameSection = (section == bSection) && (row == (bRow! + 1))
        
        let firstRowInNextSection = ((section == (bSection! + 1)) && (row == 0));
        
        let shouldScroll = nextRowInSameSection || firstRowInNextSection;
        
        self.insertRows(at: [indexPath], with: UITableViewRowAnimation.right)
        
        if (shouldScroll) {
            self.scrollToRow(at: indexPath, at: .bottom, animated: true)
        }
    }
}