UITableView lag when scrolled up after segue

Question

After playing around with segue, I have found that my UITableView lags for unknown reasons after performing a segue. Please see video: https://www.youtube.com/watch?v=mPAVcvf9UcE source code: http://pastebin.com/c62UZiNx

I have faced the problem after following the solution for this question: How can I get the UITableView scroll position so I can save it?

The only way I managed to fix this is by creating a CGPoint (like CGPointMake(0,20) ) rather than remembering it when the segue occurs.

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "showDetailedPost" {
         if let vc = segue.destinationViewController as? DetailedPostVC {
             offset = tableView.contentOffset
             vc.num = tableView.indexPathForSelectedRow()!.row
         }
    }
}

This does not seem to fix the problem:

override func viewWillDisappear(animated: Bool) {
    offset = tableView.contentOffset
}

override func viewWillAppear(animated: Bool) {
    tableView.contentOffset = offset
}

Do you use estimate Height per chance? – Miknash Jul 06 '15 at 23:23 — Miknash, Jul 06 '15 at 23:23
No, I don't use it anywhere. – driver733 Jul 07 '15 at 04:54 — driver733, Jul 07 '15 at 04:54

driver733 · Accepted Answer · 2015-07-11T21:17:59.437

0

The discussed behavior is fixed since iOS 8.4, so the problem is relevent only to prior iOS versions.

edited Jul 11 '15 at 21:17

answered Jul 07 '15 at 12:58

driver733

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UITableView lag when scrolled up after segue

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