iOS 如何改变表视图分割线在iOS7中的默认偏移

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.automaticallyAdjustsScrollViewInsets = NO;
    if ([self.tableView respondsToSelector:@selector(setSeparatorInset:)])
    {
        [self.tableView setSeparatorInset:UIEdgeInsetsZero];
    }
    if ([self.tableView respondsToSelector:@selector(setLayoutMargins:)])
    {
        [self.tableView setLayoutMargins:UIEdgeInsetsZero];
    }
}

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if ([cell respondsToSelector:@selector(setSeparatorInset:)])
    {
        [cell setSeparatorInset:UIEdgeInsetsZero];
    }
    if ([cell respondsToSelector:@selector(setLayoutMargins:)])
    {
        [cell setLayoutMargins:UIEdgeInsetsZero];
    }
}