UITableView scrollToRow no longer works on iOS 11 right after adding a new row

Question

I\'ve noticed a weird UITableView behaviour which only seems to occur on iOS 11 devices.

Right after inserting a new row (changing data source and then calling reloadDat

Answer 1

dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.01 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{

    [self.tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionBottom animated:YES];
});

Adding a small delay is working in my case.

Answer 2

Are you calling scrollToRow() in viewDidAppear?

Moving the function call from viewWillAppear to viewDidAppear worked for me.

Answer 3

Accepted answer in Swift 4 syntax

let deadlineTime = DispatchTime.now() + .seconds(1)
                DispatchQueue.main.asyncAfter(deadline: deadlineTime) {
                    self.tableView.scrollToRow(at: indexPath, at: .middle, animated: true)
                }

Answer 4

Not sure if the situation I encountered applies to this question, but I also had a situation where UITableView.scrollTo... started misbehaving from iOS 11.

In my case, I was calling UITableView.reload... and UITableView.scrollTo... consecutively. And what it turned out is that the order matters.

This works :

tableView.reloadData()
tableView.scrollToRow(at: indexPath, at: .top, animated: true)

This doesn't :

tableView.scrollToRow(at: indexPath, at: .top, animated: true)
tableView.reloadData()

Hopefully this helps.

Answer 5

Just DispatchQueue.main.async works for me.