swipeToDeleteHint.swift

// From: https://stackoverflow.com/questions/55592124/ios-how-to-give-a-peek-at-the-swipe-to-delete-action-on-a-table-view-cell

extension UITableView {
    func presentTrailingSwipeHint() {
        let cell = self.cellForRow(at: IndexPath(item: 0, section: 0))
        cell?.presentTrailingSwipeHint(actionColor: UIColor.red)
    }
}

fileprivate extension UITableViewCell {
    func presentTrailingSwipeHint(actionColor: UIColor, hintWidth: CGFloat = 10, hintDuration: TimeInterval = 0.5) {
        // Create fake action view
        let dummyView = UIView()
        dummyView.backgroundColor = .red
        dummyView.translatesAutoresizingMaskIntoConstraints = false
        addSubview(dummyView)
        clipsToBounds = false
        // Set constraints
        NSLayoutConstraint.activate([
            dummyView.topAnchor.constraint(equalTo: topAnchor),
            dummyView.leadingAnchor.constraint(equalTo: trailingAnchor, constant: 0),
            dummyView.bottomAnchor.constraint(equalTo: bottomAnchor),
            dummyView.widthAnchor.constraint(equalToConstant: hintWidth)
        ])
        // This animator reverses back the transform.

        let secondAnimator = UIViewPropertyAnimator(duration: hintDuration / 2, curve: .easeOut) {
            self.transform = .identity
        }
        // Don't forget to remove the useless view.
        secondAnimator.addCompletion { position in
           dummyView.removeFromSuperview()
        }

        // We're moving the cell and since dummyView
        // is pinned to cell's trailing anchor
        // it will move as well.
        let transform = CGAffineTransform(translationX: -hintWidth, y: 0)
        let firstAnimator = UIViewPropertyAnimator(duration: hintDuration / 2, curve: .easeIn) {
            self.transform = transform
        }
        firstAnimator.addCompletion { position in
            secondAnimator.startAnimation()
        }
        // Do the magic.
        firstAnimator.startAnimation()
    }
}