The first cell of the tableView group style starts at y 35

Group style tableview, the default first cell starts from 35, need

Add the following code to start from scratch

        _tableView.tableHeaderView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, mScreenWidth, 0.001)];

As shown in the figure, when the tableHeaderView is set, if not set, estimatedSectionHeaderHeight is only used in the proxy method

Middle configuration height

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section
{
    return 0.01;
}

It is found that the height in the proxy method only works in the first partition

 

If we need to show normal, we need to add the following code

        _tableView.estimatedSectionHeaderHeight = 0.01;

At this time, the display is normal

 

It can be seen from this that if we need to display the header of the grouped style tableview normally,

It takes three steps

1         _tableView.tableHeaderView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, mScreenWidth, 0.001)];

2    _tableView.estimatedSectionHeaderHeight = 0.01

3 Configuration height in proxy method