How to scroll subview in tableview?

Question

iOS

Actually the question itself in the title created the button:

let button = UIButton(frame: CGRect(x: view.frame.maxX - 65, y: view.frame.maxY - 65, width: 50, height: 50))
        button.setTitleColor(.gray, for: .normal)
        button.backgroundColor = UIColor(red: 204/255, green: 0/255, blue: 102/255, alpha: 1)
        button.setImage(UIImage(named: "backButton")?.resize(targetSize: CGSize(width: 35, height: 35)), for: .normal)
        button.layer.borderColor = UIColor.white.cgColor
        button.layer.borderWidth = 1
        button.layer.cornerRadius = button.frame.width / 2
        button.clipsToBounds = true
        button.addTarget(self, action: #selector(back), for: .touchUpInside)
        view.addSubview(button)

And it is necessary that when scrolling the page, the button remains in the same place (in this case, bottom right). How to do it?

A photo

Answer 1

button.translatesAutoresizingMaskIntoConstraints = false
if #available(iOS 11.0, *) {
     button.rightAnchor.constraint(equalTo: tableView.safeAreaLayoutGuide.rightAnchor, constant: -10).isActive = true
     button.bottomAnchor.constraint(equalTo: tableView.safeAreaLayoutGuide.bottomAnchor, constant: -10).isActive = true
}

Answer 2

Probably - do not add a subview button to the table view. Let it lie on top of the table and then it will not scroll. Or did I not understand the question?