iOS 11 added a nice easy way to add Custom Swipe-able Actions in UITableView using the UITableViewDelegate protocol

Custom Swipe Actions in UITableViewCells

    override func tableView(_ tableView: UITableView, leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
        let contextItem = UIContextualAction(style: .normal, title: "Leading & .normal") { (contextualAction, view, boolValue) in
            print("Leading Action style .normal")
        }
        let swipeActions = UISwipeActionsConfiguration(actions: [contextItem])
        
        return swipeActions
    }
    
    override func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
        let contextItem = UIContextualAction(style: .destructive, title: "Trailing & .destructive") { (contextualAction, view, boolValue) in
            print("Trailing Action style .destructive")
        }
        let swipeActions = UISwipeActionsConfiguration(actions: [contextItem])
        
        return swipeActions
    }

Two new methods in the UITableViewDelegate protocol are a nice addition.

Can simply copy/paste this into a Master Detail template app to demo.

Thank you for your code snippet.

And UIContextualActionHandler defined like this:
typealias UIContextualActionHandler = (UIContextualAction, UIView, (Bool) -> Void) -> Void

So we can let swipe done by calling the bool function

    override func tableView(_ tableView: UITableView, leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration? {
        let contextual = UIContextualAction(style: .normal, title: "Leading") { (contextAction, view, isSuccess) in
            print("leading swipe action")

            isSuccess(true)
        }

        return UISwipeActionsConfiguration(actions: [contextual])
    }

For multiple UIContextualActions I'm facing an issue where titles and icons are misaligned, similar to this
https://stackoverflow.com/questions/48671607/uicontextualaction-icon-and-text-alignment

Any fix?