Asks the delegate for the height to use for the header of a particular section.
- iOS 2.0+
- Mac Catalyst 13.0+
- tvOS 9.0+
The table-view object requesting this information.
An index number identifying a section of
A nonnegative floating-point value that specifies the height (in points) of the header for
Use this method to specify the height of custom header views returned by your
Prior to iOS 5.0, table views would automatically resize the heights of headers to 0 for sections where
table returned a
nil view. In iOS 5.0 and later, you must return the actual height for each section header in this method.