Call [self.tableView reloadData];
each time the slider moves.
Ensure the value you want to be dynamic is a property and is set by the slider.
If you do not want to reload the entire tableView you can also reload the cell with this function:
- (void)reloadRowsAtIndexPaths:(NSArray *)indexPaths withRowAnimation:(UITableViewRowAnimation)animation
Check out this question for more help on reloadRowsAtIndexPaths: Reload specific UITableView cell in iOS