Why does my UITableView “jump” when inserting or removing a row?

Question

(Happy to accept an answer in Swift or Objective-C)

My table view has a few sections, and when a button is pressed, I want to insert a row at the end of section 0.

Answer 1

This was happening for me on a UITableView that had multiple sections, but no definitions for what it's header height or view should be for those sections. Adding the following delegate methods fixed it for me - hope it helps!

func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
    return 0
}

func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
    return nil
}