How to change height of grouped UITableView header?

Question

I know how to change the height of the section headers in the table view. But I am unable to find any solution to change the default spacing before the first section.

Answer 1

It appears that I can't set a table header view with height of 0. I ended up doing the following:

- (void)viewWillAppear:(BOOL)animated{
    CGRect frame = self.tableView.tableHeaderView.frame;
    frame.size.height = 1;
    UIView *headerView = [[UIView alloc] initWithFrame:frame];
    [self.tableView setTableHeaderView:headerView];
}