Support HeaderView/ FooterView for Sections

[faris-mobile89]

How to add footer or header view for each section.

in Objective C we can use:
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {}

[mohamede1945]

You create a class conforming to SupplementaryViewCreator or use any of its implementation like BasicSupplementaryViewCreator.

Then you assign it to the data source with any of the following methods

/// Sets a header creator.
open func set(headerCreator: SupplementaryViewCreator)

/// Sets a footer creator.
open func set(footerCreator: SupplementaryViewCreator)

/// Sets both header and footer creators.
open func set(headerCreator: SupplementaryViewCreator, footerCreator: SupplementaryViewCreator) 

If you have a one basic data source. Just assign it to it. But if you have a CompositeDataSource(sectionType: .multi), you can assign it to the root composite data source to get the same header and/or footer for all sections or assign different ones to ALL the children to get different headers and/or footers for each section.

[mohamede1945]

Please re-open if that didn't help.