How to get a UITableview to go to the top of page on reload?

Here's another way you could do it:

Objective-C

[tableView setContentOffset:CGPointZero animated:YES];

Swift 3 and higher

tableView.setContentOffset(.zero, animated: true)

Probably the easiest and most straight forward way to do it.

To scroll to a specific section you need to specify the index path to it:

NSIndexPath *topPath = [NSIndexPath indexPathForRow:0 inSection:0];
[TableView scrollToRowAtIndexPath:topPath
                 atScrollPosition:UITableViewScrollPositionTop
                         animated:YES];

If you are uncertain about the number of rows in your tableView. Use the following:

NSIndexPath *topPath = [NSIndexPath indexPathForRow:NSNotFound inSection:0];
[TableView scrollToRowAtIndexPath:topPath
                 atScrollPosition:UITableViewScrollPositionTop
                         animated:YES];

After reading all of the answers here and elsewhere, I finally found a solution that works reliably and does not show the scrolling after the data is loaded. My answer is based on this post and my observation that you need a negative offset if you are using content insets:

func reloadAndScrollToTop() {
    tableView.reloadData()
    tableView.layoutIfNeeded()
    tableView.contentOffset = CGPoint(x: 0, y: -tableView.contentInset.top)
}