Extension to find which view is currently the first responder - this only works if the responder is the current view or a child of the current view

UIView+FirstResponder.swift

import Foundation
import UIKit

extension UIView {
	
	var firstResponder: UIView? {
		guard !isFirstResponder else {
			return self
		}
		for view in subviews {
			guard let responder = view.firstResponder else {
				continue
			}
			return responder
		}
		return nil
	}
	
}