在Objective -C中如何在iOS Xcode中手动调用viewForHeaderInSection函数

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
    UIView *headerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, tableView.frame.size.width, 50)];
    headerView.backgroundColor = [UIColor grayColor];
    
    UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(10, 0, tableView.frame.size.width - 20, 50)];
    titleLabel.text = [NSString stringWithFormat:@"Section %ld", (long)section];
    titleLabel.textColor = [UIColor whiteColor];
    [headerView addSubview:titleLabel];
    
    return headerView;
}