重新加载uitableviewcell时随机滚动，iOs / Swift

Question

I am developing news feed and I am using uitableview to display data. I am loading each cell data synchronically in other thread and use protocol method to display loaded data:

func nodeLoaded(node: NSMutableDictionary) {
    for var i = 0; i < nodesArray.count; ++i {
        if ((nodesArray[i]["id"] as! Int) == (node["id"] as! Int)) {
            nodesArray[i] = node
            CATransaction.setDisableActions(true)
            self.tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.None)
            CATransaction.setDisableActions(false)
        }
    }
}

The problem is that when I scrolling down (while tableview updating), tableview push me on the top. I was searching answer on this problem, but nothing helps me. I already tried to disable animation:

            CATransaction.setDisableActions(true)
            self.tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.None)
            CATransaction.setDisableActions(false)

2)

            UIView.setAnimationsEnabled(false)
            self.tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.None)
            UIView.setAnimationsEnabled(true)

But the story always the same. I have the desired effect when I simply don't use self.tableView.reloadRowsAtIndexPaths([indexPath], withRowAnimation: UITableViewRowAnimation.None) , but in this case data reload only if I scroll down and then return back to cell.

Maybe the problem is that I use auto layout and tableview recalculate its height every time? But I don't know how to fix it

Answer 1

You can build the reload mechanism yourself.

Iterate over all visible cells ( tableView.visibleCells ) and apply the same logic to them as you would in -tableView:cellForRowAtIndexPath: .

If you need the index path to perform this update, you can ask the table view for it ( -indexPathForCell: ).