What is the proper way to animate custom table view cell constraint change

Question

I have asyncimage view in table view custom cell and height constraint for the image view.

After the completion of image download, i have to increase the height of cell. so i am changing the height constraint's constant.

// cell.swift

self.heightConstraint.constant = image.size.height
self.delegate?reloadTableView()

// viewcontroller.swift

func reloadTableView()
{
   self.tableView.beginUpdates()
   self.tableView.endUpdates()
}

When i try to change the constraint's constant, i got the some constraint exceptions.

The one solution is here:

changing the priority

How to change textview height constraint within table view cell?

Is there any other way to resolve this problem? and what is the proper way?