title: In iOS9.0, the MPVolumeSlider value is not holding proper value, It always 0.0
body: <p>The following code works fine in iOS 8.0 devices, but in iOS9.0 always getting slider value as 0.000,</p>
  
  <pre><code>    let volumeView = MPVolumeView()
      for subview in volumeView.subviews {
          if subview.isKindOfClass((NSClassFromString("MPVolumeSlider"))!) {
              let volumeSlider = subview as? UISlider
              print("volumeSlider value : \(volumeSlider?.value)")
          }
      }
  </code></pre>
  
  <p>console output :
  volumeSlider value : Optional(0.0)</p>
  
  <p>Any idea about this behaviour? I want to get master volume value. Please give your suggestions.</p>