[self.tableview setEditing:YES] didn't work

[geekishmai]

when I try to use setEditing in this HVtableview, every cell can't move or change any more.

- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return UITableViewCellEditingStyleDelete;
}

- (IBAction)clickEditTable:(id)sender {
    [self.tableview setEditing:YES];
}