For UITableView do I need to implement trailingSwipeActionsConfigurationForRowAt and/or editActionsForRowAt?

Question

iOS11 introduced trailingSwipeActionsConfigurationForRowAt (and leading...). Does that mean I now have to implement

1. the trailing/leading methods to control swiping for iOS11 AND
2. editActionsForRowAt for iOS10?

How to get the simulator to run iOS10 simulations to see how my app behaves in the back level OS? Since everything is now iOS11, I'm not sure how my app will be in that version?

To clarify: I want actions for rows, but I don't want the default behaviour in iOS11 of performsFirstActionWithFullSwipe. If I just implement editActionsForRowAt then iOS11 does the full swipe.

Answer 1

According to your requirement:

I want actions for rows, but I don't want the default behaviour in iOS11 of performsFirstActionWithFullSwipe. If I just implement editActionsForRowAt then iOS11 does the full swipe.

In iOS-10 and below,

to get the edit actions work in a UITableView, just implement the below methods:

func tableView(_ tableView: UITableView, canEditRowAt indexPath: IndexPath) -> Bool
{
    return true
}

func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]?
{
    let deleteAction = UITableViewRowAction(style: .destructive, title: "Delete") { (action, indexpath) in
        //YOUR_CODE_HERE
    }
    deleteAction.backgroundColor = .red
    return [deleteAction]
}

In iOS-11,

2 new methods were introduced to support editing in a UITableView, i.e. leadingSwipeActionsConfigurationForRowAt and trailingSwipeActionsConfigurationForRowAt.

According to Apple,

Swipe actions

These methods supersede -editActionsForRowAtIndexPath: if implemented

return nil to get the default swipe actions

So, you can implement these 2 methods to get the iOS-11 specific behaviour. Even if you don't editActionsForRowAt will be called.

If you don't want the default full swipe behaviour of edit action in iOS-11, just set performsFirstActionWithFullSwipe to false.

Example:

@available(iOS 11.0, *)
func tableView(_ tableView: UITableView, leadingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration?
{
    return nil
}

@available(iOS 11.0, *)
func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration?
{
    let deleteAction = UIContextualAction(style: .destructive, title: "Delete") { (action, view, handler) in
        //YOUR_CODE_HERE
    }
    deleteAction.backgroundColor = .red
    let configuration = UISwipeActionsConfiguration(actions: [deleteAction])
    configuration.performsFirstActionWithFullSwipe = false
    return configuration
}

Let me know if you still face any issues.