Might be something to do with the dimensions of your tableView. See this other answer for details. Basically, what is says is that if your tableView is too small, then the
cellForRowAtIndexPath method is never called. Try making your tableView smaller, or decreasing the size of your header or footer of the tableView. If this doesn't work, try reloading the table using
tableView.reloadData() on the main thread.