How to get a UITableview to go to the top of page on reload?

Question

I am trying to get a UITableview to go to the top of the page when I reload the table data when I call the following from

- (void)pickerView:(UIPickerView *)pic         


        

Answer 1

Perfectly to the top of page on reload, by twice reloading

dataForSource = nil
tableView.reloadData()

DispatchQueue.main.asyncAfter(deadline: .now() + 0.4) {
    self.dataForSource = realData
    self.tableView.reloadData()
}