Protocol Example - 3 : Multiple protocol extensions of a class : Medium blog :

ProtocolExample3.swift

class PlacesMapViewController: UIViewController {
    //PlacesMapViewController implementation
}

extension PlacesMapViewController: MKMapViewDelegate {
    //implementation of methods releated to mapView
}
extension PlacesMapViewController: UISearchBarDelegate {
    //implementation of methods releated to searchbar
}

This is just example of multiple extensions of a class by implementing multiple protocols - written for the medium blog - Protocol - The power of Swift

https://medium.com/p/950c85bb69b1