How do I make a UITableViewCell appear disabled?

I know about UITableview: How to Disable Selection for Some Rows but Not Others and cell.selectionStyle = UITableViewCellSelectionStyleNone, but how do I make a cell (or any UIView for that matter) appear disabled (grayed-out) like below?

You can just disable the cell's text fields to gray them out:

Swift 4.x

cell!.isUserInteractionEnabled = false
cell!.textLabel!.isEnabled = false
cell!.detailTextLabel!.isEnabled = false

A Swift extension that works well in the context I'm using it; your mileage may vary.

Swift 2.x

extension UITableViewCell {
    func enable(on: Bool) {
        for view in contentView.subviews as! [UIView] {
            view.userInteractionEnabled = on
            view.alpha = on ? 1 : 0.5
        }
    }
}

Swift 3:

extension UITableViewCell {
    func enable(on: Bool) {
        for view in contentView.subviews {
            view.isUserInteractionEnabled = on
            view.alpha = on ? 1 : 0.5
        }
    }
}

Now it's just a matter of calling myCell.enable(truthValue).