Change background color of uisearchcontroller

Eh, with some thought I solved it.

sc.searchBar.barTintColor = UIColor.rgb(10, green: 150, blue: 255)

     sc.searchBar.searchBarStyle = UISearchBarStyleProminent
     sc.searchBar.backgroundImage = [UIImage new]
     sc.searchBar.barTintColor = UIColor.rgb(10, green: 150, blue: 255)

set searchBarStyle to Prominent. It working for me