ios - custom editingAccessoryView not working

Question

I have the following code for a UITableView with custom cell:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"FolderCellViewController"];
    if (cell == nil) {
        // Load the top-level objects from the custom cell XIB.
        NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:@"FolderCellViewController" owner:self options:nil];
        // Grab a pointer to the first object (presumably the custom cell, as that's all the XIB should contain).
        cell = [topLevelObjects objectAtIndex:0];
        cell.editingAccessoryView=accessoryView; //accessoryView is a UIView within a UITableViewCell, and it is properly connected in IB
        cell.selectionStyle = UITableViewCellSelectionStyleNone;

    }
    return cell;
}


// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Return NO if you do not want the specified item to be editable.
    return NO; //YES here makes a red delete button appear when I swipe
}


// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (editingStyle == UITableViewCellEditingStyleDelete) {
        // Delete the row from the data source
        // [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
    }   
    else if (editingStyle == UITableViewCellEditingStyleInsert) {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
    }   
}

But for some when I swipe nothing happens. I haven't done anything but this-is there anything else I need to do for this to work?

EDIT: Apparently what I did only sets the editing style for when the entire table is in edit mode, not when I swipe on each individual cell. So what I want to do is when I swipe on each cell, the custom accessoryView appears for that cell. But I'm not sure how to do that..

Answer 1

The editing accessory view is shown when the cell enters editing mode. It does seem a little bit too hard to actually get this working, but I have managed it:

To get this to show both when entering edit mode for the whole table, and when swiping an individual row, I have implemented the following in my UITableViewController subclass:

- (void)setEditing:(BOOL)editing animated:(BOOL)animated {

    if (editing)
        self.editingFromEditButton = YES;
    [super setEditing:(BOOL)editing animated:(BOOL)animated];
    self.editingFromEditButton = NO;
    // Other code you may want at this point...
}

editingFromEditButton is a BOOL property of the subclass. This method is called when the standard "Edit" button is pressed. It is used in the following method which prevents the standard delete button showing:

- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (self.editingFromEditButton)
        return UITableViewCellEditingStyleNone;

    // Otherwise, we are at swipe to delete
    [[tableView cellForRowAtIndexPath:indexPath] setEditing:YES animated:YES];
    return UITableViewCellEditingStyleNone;
} 

If the whole table view is being set to editing mode then each cell will also be sent the setEditing message. If we have swiped a single row, then we need to force that cell into editing mode, and then return the UITableViewCellEditingStyleNone style to prevent the standard delete button from appearing.

Then, to dismiss the custom editing accessory, you also need the following code:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 
{
    // Cancel the delete button if we are in swipe to edit mode
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
    if (cell.editing && !self.editing)
    {
        [cell setEditing:NO animated:YES];
        return;
    }

    // Your standard code for when the row really is selected...
}