Question

I have a UITableView within which I am allowing the user to re-order cells. All cells can be re-ordered except the top row, which must always remain as the top row.

I have used the canMoveRowAtIndexPath method to prevent the top row from being moveable. However, I can’t see a way to prevent the user from dragging any of the other rows and dropping them above the top row, thus breaking my top-row requirement.

How do I stop users being able to drag other rows above the top row?

Thanks.

Answer 1

There is a UITableViewDelegate method that allows you to amend the destination index path if it doesn’t meet your requirements. I think this should work:

- (NSIndexPath *)tableView:(UITableView *)tableView targetIndexPathForMoveFromRowAtIndexPath:(NSIndexPath *)sourceIndexPath toProposedIndexPath:(NSIndexPath *)proposedDestinationIndexPath {
    if (proposedDestinationIndexPath.row == 0) {
        return sourceIndexPath;
    }
    else {
        return proposedDestinationPath;
    }
}