UITableView gap between UITableViewHeader and cells - objective-c

Question

I have strange problem with tableViewHeader which I resize on scroll.
After first scroll to top, I have space between tableHeader and cells and after each next scroll, space increasing.
In tableViewHeader custom class, after scrolling I change height and return back, then resetting it, so UITableView will update frame size.
Also I have 0.1f height for first section view, UITableViewController,
self.automaticallyAdjustsScrollViewInsets = NO;
I double checked that tableViewHeader have right height.
I have tried many solutions, but nothing works for me.
What happens? Who is adding extra space and why?
EDIT: Table delegate and data source methods
-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
return 0.001;
}
-(CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section {
return 0.001;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 1;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.section == 0 && indexPath.row == 0) {
return [self nameCell];
}
return nil;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.section == 0 && indexPath.row == 0) {
return 60;
}
return 0;
}
-(UIView*)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{
if (section == 0) {
UIView* view = [[UIView alloc] initWithFrame: CGRectMake(0.0f, 0.0f, self.tableView.frame.size.width, 0.001f)];
return view;
}
return nil;
}
-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
if (scrollView == self.tableView) {
[_tableHeader didScroll:scrollView.contentOffset];
}
}

Answer 1

Found a solution.
First of all, don't set tableViewHeader in custom class. Do it in controller where tableView inserted.
Second: wrap tableViewHeader set in beginUpdates, endUpdates.
I don't know how "updates" for cells used with tableViewHeader, but it works

Answer 2

i fixed that by putting the header(auto layout) into a wrap view which is a fixed UIView as subview. the gap will be gone.
self.header = [[NSBundle mainBundle] loadNibNamed:#"FriendDetailHeaderView"
owner:nil
options:nil][0];
self.header.frame = CGRectMake(0, 0, ScreenWidth, ScreenWidth/16*9+25);
UIView *aView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, ScreenWidth, ScreenWidth/16*9+25)];
aView.backgroundColor = [UIColor blackColor];
[aView addSubview:self.header];
self.tableView.tableHeaderView = aView;
the auto layout tableViewHeader sometimes can not work out. but in my previous project, set the auto layout view to tableView.tableViewHeader it works perfectly