how to hide empty rows in a UITableView and change the height of the Uitableview based on non-empty rows

Question

I have couple of problems with my UITableView.

1. When I add a UITableview on my page, by default it brings up some fixed number of rows,

Answer 1

A bit hidden in Bourne's answer; if you want to hide to bottom empty rows in a plain tableview with multiple sections, use this answer:

https://stackoverflow.com/a/5658100/580173