UITableView Not Respecting heightForHeaderInSection/heightForFooterInSection?

user_555 0
Viewed 28082

I have a UITableView where in some instances, certain sections have zero rows. My goal is that when this is true, I don't want any wasted space in the table view, it should look like there's no data.

The problem I'm having is with the header and footer for the sections, which are showing even if there's no row and despite me overriding the delegate method to return 0.0f.

Here's what it looks like - you can see the ~20p of gray space at the top there, headers and footers of about 10p each for a section with 0 rows.

alt text
(source: hanchorllc.com)

Here's my pseudo code:

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
     if ([section hasRow]) {
          return 10.0f;
     } else {
          return 0.0f;
     }
}



- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section {
     if ([section hasRow]) {
          return 10.0f;
     } else {
          return 0.0f;
     }
}

I have verified that these methods are being called and that the proper execution path is taking place.

One wrinkle - this view controller is using a XIB and that UITableView has the section header and footer values set at 10.0 (default), though I thought that was overriden by the delegate method, if implemented.

This is an app targeting 3.0.

What am I doing wrong?

iphone cocoa-touch
8 Answers

I found that in my case 2 things were needed to slay the phantom footer:

1) setting the table view sectionFooterHeight to 0, i.e. in viewDidLoad adding:

tableView.sectionFooterHeight = 0

2) adding the delegate method:

override func tableView(tableView: UITableView, viewForFooterInSection section: Int) -> UIView? {
    return UIView(frame: CGRect.zero)
}

(using Swift 2.2)

user_57756900

I had a similar problem: I was loading a UITableView from a XIB (same as you), and supplied a 0 height for some section footers with tableView:heightForFooterInSection (same as you), but the value was ignored.

The fix was simple: also set the footer height to 0.0 in the XIB. (In Interface Builder select the Table View, press Command-3 to view the Size Inspector, look for the footer height field near the top)

Once that was done it obeyed the custom footer height as expected. (Perhaps it treats the XIB footer height as a minimum?)

user_2352290

It works for me:

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
    tableView.sectionHeaderHeight = (section == 0 ? 10 : 0);
    return tableView.sectionHeaderHeight;
}

- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section
{
    tableView.sectionFooterHeight = (section == 0 ? 20 : 4);
    return tableView.sectionFooterHeight;
}
user_6191230

I use the following solution:

func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
    return section == 0 ? CGFloat.leastNormalMagnitude : 8
}

func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
    return 0
}

Result:

result

user_81754300
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