// Add MPVolumeView in a holder view
let mpVolumeHolderView = UIView(frame: CGRect(x: 0, y: view.bounds.midY, width: view.bounds.width, height: view.bounds.height))
// Set the holder view's background color to transparent
mpVolumeHolderView.backgroundColor = .clear
let mpVolume = MPVolumeView(fr...
