Question

.

Hello,

I have the following code to set the re-ordering of the tableView.

#pragma mark Row reordering
// Determine whether a given row is eligible for reordering or not.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
return YES;
}
// Process the row move. This means updating the data model to <span id="IL_AD6" class="IL_AD">correct</span> the item indices.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath
  toIndexPath:(NSIndexPath *)toIndexPath {
NSString *item = [arr objectAtIndex:fromIndexPath.row];
[arr removeObject:item];
[arr insertObject:item atIndex:toIndexPath.row];


}

But when I reload the TableView (note not a TableViewController) The order is set back to what it was before I changed anything.

Now when I setup the editing for this view (the delete buttons) I had to add this line:

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

before it appeared in my view.

Is there a similar thing I need to set with the re-ordering of the table view for it to save?

The data is fetched from a Core Data database.

Answer 1

In order to persist the order of the objects I’m afraid you will need to add an attribute for that to your data model. Just use an int / [NSNumber] and recompute them in a loop when a table view row is moved.