UITableViewCell, show delete button on swipe

Question

How do I get the delete button to show when swiping on a UITableViewCell? The event is never raised and the delete button never appears.

Answer 1

During startup in (-viewDidLoad or in storyboard) do:

self.tableView.allowsMultipleSelectionDuringEditing = NO;

Override to support conditional editing of the table view. This only needs to be implemented if you are going to be returning NO for some items. By default, all items are editable.

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
    // Return YES if you want the specified item to be editable.
    return YES;
}

// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        //add code here for when you hit delete
    }    
}

Answer 2

I had a problem which I have just managed to solve so I am sharing it as it may help someone.

I have a UITableView and added the methods shown to enable swipe to delete:

- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
    // Return YES if you want the specified item to be editable.
    return YES;
}

// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        //add code here for when you hit delete
    }    
}

I am working on an update that allows me to put the table into edit mode and enables multiselect. To do that I added the code from Apple's TableMultiSelect sample. Once I got that working I found that my swipe the delete function had stopped working.

It turns out that adding the following line to viewDidLoad was the issue:

self.tableView.allowsMultipleSelectionDuringEditing = YES;

With this line in, the multiselect would work but the swipe to delete wouldn't. Without the line it was the other way around.

The fix:

Add the following method to your viewController:

- (void)setEditing:(BOOL)editing animated:(BOOL)animated
{
    self.tableView.allowsMultipleSelectionDuringEditing = editing; 
    [super setEditing:editing animated:animated];
}

Then in your method that puts the table into editing mode (from a button press for example) you should use:

[self setEditing:YES animated:YES];

instead of:

[self.tableView setEditing:YES animated:YES];

This means that multiselect is only enabled when the table is in editing mode.

Answer 3

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath 
{
    if (editingStyle == UITableViewCellEditingStyleDelete)
    {
        //add code here for when you hit delete
        [dataSourceArray removeObjectAtIndex:indexPath.row];
        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
    }    
}    

Answer 4

Swift 4

func tableView(_ tableView: UITableView, editActionsForRowAt indexPath: IndexPath) -> [UITableViewRowAction]? {
    let delete = UITableViewRowAction(style: .destructive, title: "delete") { (action, indexPath) in
        // delete item at indexPath
    tableView.deleteRows(at: [indexPath], with: .fade)

    }
    return [delete]
}

Answer 5

This code shows how to implement the delete.

#pragma mark - UITableViewDataSource

// Swipe to delete.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        [_chats removeObjectAtIndex:indexPath.row];
        [tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
    }
}

Optionally, in your initialization override, add the line below to show the Edit button item:

self.navigationItem.leftBarButtonItem = self.editButtonItem;

Answer 6

Note: I don't have enough reputation to post a comment in the answer from Kurbz.

The answer from Kurbz is right. But for me it never worked.

After some investigation, I realized that swipe-to-delete happens when NOT editing the table view..

I never seen this explicitly stated as such. Unless I'm mistaken, I haven't found any other way to have it work.

When you are editing, the delete and/or reorder control will show up.