Swiping on a tableview is deselecting all selected rows trailingSwipeActionsConfigurationForRowAt

Question

Recently implemented trailingSwipeActionsConfigurationForRowAt , where after swiping from right to left showing two options and its working fine. But the problem is when i select multiple rows or single row, after swiping the row/s they are getting deselected. Is there a way to keep the selection even after swiping?

Below is my code

func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) ->  UISwipeActionsConfiguration?  {

    let renameAction  = contextualToggleRenameAction(forRowAtIndexPath: indexPath)
    let lastResAction = contextualToggleLastResponseAction(forRowAtIndexPath: indexPath)

    let swipeConfig = UISwipeActionsConfiguration(actions: [renameAction, lastResAction])
    swipeConfig.performsFirstActionWithFullSwipe = false
    return swipeConfig
}

func contextualToggleLastResponseAction(forRowAtIndexPath indexPath: IndexPath) -> UIContextualAction {
    let sensorData = sensorsList?[indexPath.row]
    var lastResponse = ""
    if sensorData != nil{
        if let lstRes = sensorData!["last_response"] as? String{
            lastResponse = lstRes
        }
    }
    let action = UIContextualAction(style: .normal, title: lastResponse) { (contextAction: UIContextualAction, sourceView: UIView, completionHandler: (Bool) -> Void) in
        print("Last Response Action")
    }
    action.backgroundColor = UIColor(red: 61/255, green: 108/255, blue: 169/255, alpha: 1.0)
    return action
}

The possible solution is to override `setSelected()` method of UITableViewCell` — andrew.turkin, Mar 18 '19 at 11:40
@andrew.turkin I am overriding that, not sure how that would solve this, and at least it does not for me — Joshua Wolff, Aug 28 '19 at 08:44

Joshua Wolff · Accepted Answer · 2019-08-28T22:09:42.600

Holy crap, I fixed this stupid issue.

Yes, yes make sure tableView.allowsSelectionDuringEditing = true and tableView.allowsMultipleSelectionDuringEditing = true.

But...

Shout-out to this SO answer which almost directly led me on the way to success (see here).

KEY: Re-select/de-select the rows in your implementation of setEditing, which is a method you override. UITableView goes into editing mode when swiping.

IMPORTANT NOTE: Call super.setEditing(...) before any of your code, as shown below, or it likely won't work, or at least not perfectly.

override func setEditing(_ editing: Bool, animated: Bool) {
    super.setEditing(editing, animated: animated)
    for i in 0..<your data.count {
        if this item is selected {
            self.tableView.selectRow(at: IndexPath(row: i, section: 0), animated: false, scrollPosition: .none)
        } else {
            self.tableView.deselectRow(at: IndexPath(row: i, section: 0), animated: false)
        }
    }
}

score 2 · Answer 2 · answered Mar 22 '19 at 14:59

2

A swipe is considered as an edit, so you can enable allowsSelectionDuringEditing if you want to keep the selected state:

tableView.allowsSelectionDuringEditing = true

answered Mar 22 '19 at 14:59

Thomas

449
3
7

2

Hey @Thomas, i tried by setting true to both tableView.allowsSelectionDuringEditing and allowsMultipleSelectionDuringEditing, but it didn't worked. – Shiva Kumar Mar 23 '19 at 14:24

score 1 · Answer 3 · edited Mar 25 '19 at 08:28

1

Depending on indexPathsForSelectedRows doesn't always give the expected result.

Instead you should maintain and array of selectedIndexPaths.

Here is a code snippet to demonstrate:

var selectedIndexPaths = [IndexPath]()
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    if selectedIndexPaths.contains(indexPath) {
       selectedIndexPaths.removeAll { (ip) -> Bool in
        return ip == indexPath
    }else{
       selectedIndexPaths.append(indexPath)
    }
}

edited Mar 25 '19 at 08:28

Ameen

1,747
3
16
31

answered Mar 25 '19 at 08:07

jshivam

46
5

Why you doing `removeAll ` ?? – dahiya_boy Mar 25 '19 at 08:13
I am not removing all, I am just removing the already selected indexPath by implementing **where** clause predicate. `public mutating func removeAll(where predicate: (Element) throws -> Bool) rethrows` – jshivam Mar 25 '19 at 08:25
@jshivam, ok after saving indexpaths, when should i reselect all rows? – Shiva Kumar Mar 25 '19 at 08:46

dahiya_boy · Answer 4 · 2019-03-29T05:43:47.790

1

You can simply do this :

Create array in your controller for selected index
```
var arrSelectedIndex : [Int] = []
```

In didSelect,

if arrSelectedIndex.contains(indexPath.row) { // Check index is selected or not
    // If index selected, remove index from array
    let aIndex = arrSelectedIndex.firstIndex(of: indexPath.row)
    arrSelectedIndex.remove(at: aIndex!)
}
else {
    // If index not selected, add index to array
    arrSelectedIndex.append(indexPath.row)
}
// reload selected row, or reloadData()
self.tblView.reloadRows([indexPath.row], with: .automatic)

Edit

In trailingSwipeActionsConfigurationForRowAt,

func tableView(_ tableView: UITableView, trailingSwipeActionsConfigurationForRowAt indexPath: IndexPath) -> UISwipeActionsConfiguration?
{

    if self.arrSelectedIndex.contains(indexPath.row) {

        let action = UIContextualAction(style: .normal, title: "") { (action, view, handler) in

        }
        action.backgroundColor = .green
        let configuration = UISwipeActionsConfiguration(actions: [])
        configuration.performsFirstActionWithFullSwipe = false
        return configuration
    }
    let action = UIContextualAction(style: .normal, title: "Selected") { (action, view, handler) in

    }
    action.backgroundColor = .green
    let configuration = UISwipeActionsConfiguration(actions: [action])
    configuration.performsFirstActionWithFullSwipe = false
    return configuration
}

Output

edited Mar 29 '19 at 05:43

answered Mar 25 '19 at 09:10

dahiya_boy

9,298
1
30
51

@ShivaKumar What you doing with selected or deselected? Does it is deselected when cell is swiped or after swipe is done? Explain – dahiya_boy Mar 25 '19 at 10:07
1

i need the cells to be selected (i have multi selection enabled). As soon as i swipe all the previous selections are getting unselected. FYI : In this case "didDeselectRowAt" is not getting called. – Shiva Kumar Mar 25 '19 at 10:15
Added +50 for trying to help me. Thanks. – Shiva Kumar Mar 28 '19 at 14:14
@ShivaKumar Does it worked for you or not?? Bcz I tried here and it worked properly. – dahiya_boy Mar 29 '19 at 04:37
No it didn't worked, i was able to convince my client and removed swiping feature :) – Shiva Kumar Mar 29 '19 at 04:48
@ShivaKumar No problem bro.. – dahiya_boy Mar 29 '19 at 04:58
@ShivaKumar Can you please check Output for future reference? – dahiya_boy Mar 29 '19 at 05:44

Swiping on a tableview is deselecting all selected rows trailingSwipeActionsConfigurationForRowAt

4 Answers4