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

you can use viewForHeaderInSection and return a view with any height.

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
{

    int height = 30 //you can change the height 
    if(section==0)
    {
       UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, height)];

       return view;
    }
}

Answer 2

Example of viewForHeaderInSection:

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 118)];
view.backgroundColor = COLOR_DEFAULT;

NSString* key = [self.tableKeys objectAtIndex:section];
NSArray *result = (NSArray*)[self.filteredTableData objectForKey:key];
SZTicketsResult *ticketResult = [result objectAtIndex:0];

UIView *smallColoredView = [[UIView alloc] initWithFrame:CGRectMake(0, 5, 320, 3)];
smallColoredView.backgroundColor = COLOR_DEFAULT_KOSTKY;
[view addSubview:smallColoredView];

UIView *topBackgroundView = [[UIView alloc] initWithFrame:CGRectMake(0, 8, 320, 40)];
topBackgroundView.backgroundColor = [UIColor colorWithRed:255.0/255.0 green:248.0/255.0 blue:174.0/255.0 alpha:1];
[view addSubview:topBackgroundView];

UILabel *totalWinnings = [[UILabel alloc] initWithFrame:CGRectMake(10, 8, 300, 40)];
totalWinnings.text = ticketResult.message;
totalWinnings.minimumFontSize = 10.0f;
totalWinnings.numberOfLines = 0;
totalWinnings.backgroundColor = [UIColor clearColor];
totalWinnings.font = [UIFont boldSystemFontOfSize:15.0f];
[view addSubview:totalWinnings];

UIView *bottomBackgroundView = [[UIView alloc] initWithFrame:CGRectMake(0, 55, 320, 58)];
bottomBackgroundView.backgroundColor = [UIColor colorWithRed:255.0/255.0 green:248.0/255.0 blue:174.0/255.0 alpha:1];
[view addSubview:bottomBackgroundView];

UILabel *numberOfDraw = [[UILabel alloc] initWithFrame:CGRectMake(10, 55, 290, 58)];
numberOfDraw.text = [NSString stringWithFormat:@"sometext %@",[ticketResult.title lowercaseString]];;
numberOfDraw.minimumFontSize = 10.0f;
numberOfDraw.numberOfLines = 0;
numberOfDraw.backgroundColor = [UIColor clearColor];
numberOfDraw.font = [UIFont boldSystemFontOfSize:15.0f];
[view addSubview:numberOfDraw];

return view;

Answer 3

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];
}

Answer 4

In Swift 4

Remove extra top padding in grouped tableview.

Here height is given 1 as minimal height for the section header because you cannot give 0 as tableview will take it default top margin if assigned zero height.

func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
    return 1
}

func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
    return UIView()
}