UITableView with static cells not showing

I'm still a noob at Xcode iOS development, and today I was trying to build a nice-looking input/edit form using a UITableView with grouped static cells. It looked good on my storyboard but when debugging the cells just wouldn't show up. The reason? I was implementing three methods that shouldn't be there at all when using static cells. I deleted them and bingo, it worked. Here they are:

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
}