UITableView Reload Rows unnaturally jerking the TableView in iOS 11.2

Question

Strange issue arrived after updating new XCODE 9.2 with iOS 11.2, by calling

let indexPath = IndexPath(item: 0, section: 1)
self.tableViewHome.reloadRows(at: [indexPath], with: .none)

It causes unnecessary jerking the whole TableView, Prior it was very fine with these code.

GIF Image for iOS 11.2

GIF Image for iOS 11.1

How to stop this Jerking, I have to reload only one cell in the tableview among two cells.

Any help will be appreciated.

Thanks

Answer 1

What I understand is if you really want to use auto sizing cell(and all cell are of different sizes) then above solutions doesn't work for iOS 11.2, So what I tried is as below:

Declare variable to store the height of the cell

var cellHeightDictionary: NSMutableDictionary // To overcome the issue of iOS11.2

Initialize in viewDidLoad,

override func viewDidLoad() {
    super.viewDidLoad()
    tableView.rowHeight = UITableViewAutomaticDimension
    tableView.estimatedRowHeight = 125
    cellHeightDictionary = NSMutableDictionary()
}

and use like below:

override func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
    cellHeightDictionary.setObject(cell.frame.size.height, forKey: indexPath as NSCopying)
}
func tableView(_ tableView: UITableView, estimatedHeightForRowAt indexPath: IndexPath) -> CGFloat {
    if cellHeightDictionary.object(forKey: indexPath) != nil {
        let height = cellHeightDictionary.object(forKey: indexPath) as! CGFloat
        return height
    }
    return UITableViewAutomaticDimension
}

This works for me, Hope this helps to you too