Customising the font/background colour of index/section bar in UITableView

Question

I\'ve read in another thread on SO that you can adjust the font or background colour of the index bar (that is the A-Z # scrollbar) in a UITableView adding a CALayer. My app

Answer 1

For Swift 3.1:

 self.tblViewForContacts.sectionIndexTrackingBackgroundColor = self.view.backgroundColor
 self.tblViewForContacts.sectionIndexBackgroundColor = self.view.backgroundColor