Default height for section header in UITableView

I want to set the height of the first header in my UITableView. For the other headers I want them to remain the default height. What value/constant can I put in place of "someDefaultHeight" in the code below?

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
if (section == 0)
return kFirstHeaderHeight;


return someDefaultHeight;
}

Thanks

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小开

From checking the defaults in my app it looks like for a grouped table the default is a height of 22 and for a non-grouped table the default is a height of 10.

If you check the value of the property sectionHeaderHeight on your tableview that should tell you.

小开

This should do the trick

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
if(indexPath.section == CUSTOM_SECTION)
{
return CUSTOM_VALUE;
}
return [tableView rowHeight];
}
小开

Actually do the trick :)

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
if(section == 0)
return kFirstSectionHeaderHeight;
return [self sectionHeaderHeight];
}
小开

I'm not sure what the correct answer is here, but neither 10 or 22 appears to be the correct height for a grouped table view in iOS 5. I'm using 44, based on this question, and it at least appears to roughly the correct height.

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最佳答案

In IOS 5.0 onwards you can return UITableViewAutomaticDimension in most of the delegate methods. Its at the bottom of the documentation page 

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
if(section == CUSTOM_SECTION)
{
return CUSTOM_VALUE;
}
return UITableViewAutomaticDimension;
}
小开

For the sake of completeness: in iOS7+ the height for grouped style section headers is 55.5 for the first and 38 for following headers. (measured with DCIntrospect)

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To get the default height, just let super handle it: 

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
if (section == 0)
return kFirstHeaderHeight;


return [super tableView:tableView heightForHeaderInSection:section];
}
小开

For swift 4.2 you should return UITableView.automaticDimension


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