UITableView jumps when scrolling after changing cell height

Question

So, I have a tableView where I want to change the height of the cell when clicked. In fact, I am replacing it with a larger cell. When pressed, I call:

tableView.beginUpdates()
tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
tableView.endUpdate()

And then I change my cellForRowAtIndexPathto return the right new cell and height. Cell height is automatically calculated by overriding sizeThatFitsin the cell implementation:

override func sizeThatFits(size: CGSize) -> CGSize {
    return CGSizeMake(size.width, myHeight)
}

Oddly enough, after I do this, the scroll down is fine, but when I scroll up, the table jumps 5 or so pixels every second until I get to the top. After I get to the top of the table, the problem will disappear and there are no jumps in any direction. Any idea why this is happening? I suppose this has something to do with the new cell height offsetting the other cells, but I don't understand why tableView doesn't care about this. Any help is appreciated!

Thank!

EDIT: Added code from cellForRowAtIndexPath:

 if self.openedCellIndex != nil && self.openedCellIndex == indexPath {
     cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as ListCell
     (cell as ListCell).updateWithDetailView(dayViewController!.view)
 } else {
     cell = tableView.dequeueReusableCellWithIdentifier("cell", forIndexPath: indexPath) as ListCell
     (cell as ListCell).updateWithData(eventDay: store.events![indexPath.row], reminderDay: store.reminders![indexPath.row])
 }
 return cell

Answer 1

You should include your code for cellForRow and heightForRow, but I will give it a blind shot.

cellForRow, , . heightForRow if(yourTappedCell){return preferredHeight;}

Answer 2

, . iOS.

, , - UITableView, .

[self.tableView setContentOffset:CGPointMake(0, 0 - self.tableView.contentInset.top) animated:YES];

self.tableView.contentOffset = CGPointMake(0, 0 - self.tableView.contentInset.top);

, , =)