UITableView reloading behavior like Tweetbot/Twitter

Does anybody know how to implement a UITableView like Tweetbot/Twitter. I want the TableView to insert the rows at the top instead of pushing the older rows down. I'm aware of this post. However, I suppose 开发者_如何学编程that Tweetbot doesn't do it with a UIImage since the user is able to scroll while the TableView is reloading its stuff.

Had to use setContentOffset:animated: instead of tableView.animated =