分组 UITableView scrollToRow 不工作

Question

I'm using UITableView(frame: .zero, style: .grouped) with multiple sections and dynamic heights of cells. Each section has a header.

I'm trying to scroll to the bottom of the table view

let lastSection = tableView.numberOfSections - 1
let lastIndexPath = IndexPath(row: tableView.numberOfRows(inSection: lastSection) - 1, section: lastSection)
tableView.scrollToRow(at: lastIndexPath, at: .bottom, animated: true)

My problem is:

when there is only one item in the section , the table view gets scrolled to the header instead of the item. When there is more than one item everything works well.

Additionally for the plain style of table view, everything is ok.

Answer 1

Try using below code,

DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) { 
    let lastSection = tableView.numberOfSections - 1
    let lastIndexPath = IndexPath(row: tableView.numberOfRows(inSection: lastSection) - 1, section: lastSection)
    tableView.scrollToRow(at: lastIndexPath, at: .bottom, animated: true)
}

Answer 2

It turns out that estimatedHeightForHeaderInSection was not precise enough. Even though I don't use dynamic heights for the section headers.

So the final fix is: use the same values in the tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) and tableView(_ tableView: UITableView, estimatedHeightForHeaderInSection section: Int)