UITableView Cell not showing Delete Menu

Question

UITableViewCell is not showing the "Delete" option in this popup menu. It goes to the delete condition in the code below, but it is not showing up in the menu.

func tableView(_ tableView: UITableView, canPerformAction action: Selector, forRowAt indexPath: IndexPath, withSender sender: Any?) -> Bool {

    print(action)
    print(action == #selector(delete(_:)))

    if action == #selector(copy(_:)) {
        return true
    }
    if action == #selector(paste(_:)) {
        return true
    }
    if action == #selector(delete(_:)) {
        return true
    }


    return super.canPerformAction(action, withSender: sender)

}

The `print(action)` prints out a lot more (twenty total, including delete, copy, and paste) actions, is there a reason why you're specifically asking about "Delete"? — shim, Jun 25 '18 at 16:21
I have to implement delete row functionality. but its not showing up in menu — Alizain Prasla, Jun 26 '18 at 06:15

score 1 · Accepted Answer · answered Jun 25 '18 at 16:40

You get cut/copy/paste by default (can block any of these by returning false in canPerformAction) but the other actions (of which you'll see a total of 20 including delete as well as other iOS standard system actions like "selectAll" and "makeTextWritingDirectionRightToLeft") are not included in a UITableViewCell's context menu by default.

If you want any additional actions to show up you have to implement them in your UITableViewCell subclass.

e.g. in your cell subclass just add:

override func delete(_ sender: Any?) {
    print("delete")
}

And if you return true for the delete selector, you should see the delete item in the context menu for any such cell. performAction in the table view's delegate is still necessary, since otherwise it won't show the menu at all, but the actual handling of the action is in this cell subclass method.

If you want to add custom actions you can add them to the shared UIMenuController items and also implement them in the UITableViewCell subclass as well. (Used this tutorial as a reference, as well as my own testing).

e.g. in your view controller's viewDidLoad

let menuController = UIMenuController.shared
let item = UIMenuItem(title: "My Custom Action", action: #selector("youraction"))
var items = menuController.menuItems ?? [UIMenuItem]()
items.append(item)
menuController.menuItems = items

Then you'd need to implement "youraction" in your UITableViewCell subclass or else it won't show up.

Note none of the standard 20 actions you see printed out in canPerformAction should need to be manually added to the shared menu controller, just looks like you need to add them to your cell subclass.

Strange, it seems that `canPerformAction` is called both before the menu is shown and just once after the menu item is pressed… (but the documentation doesn't seem to mention this behaviour). I suppose it gives a developer the chance to block an action that may have initially seemed to be permissible…? The [documentation for this delegate method](https://developer.apple.com/documentation/uikit/uitableviewdelegate/1614898-tableview) is already somewhat lousy, as it doesn't even mention that you would see other actions other than just copy/paste or how to get other ones to show… — shim, Jun 25 '18 at 16:46

UITableView Cell not showing Delete Menu

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