UiSlider should be updated inside UITableviewCell every second

UiSlider should be updated inside UITableviewCell every second

I have a requirement where I need to show the slider in the UITableview's
cell. It is basically a download table view where audio items keep
downloading, the progress of download is captured and shown in tableview's
cell. Every time the download of item happens, I receive a delegate method
and that I call reload table to update the table view. This is leading to
a scrolling issue where table doesn't scroll smoothy as it will reloading
the cell for item download. How can I solve this problem?
Thanks