         musicPickerViewController.allowsPickingMultipleItems = true
         self.presentViewController(musicPickerViewController, animated: true, completion: nil)
     }
-    
-    func adjustVolume(slider: UISlider) {
-        let currentVolume = slider.value
-        for subview in MPVolumeView().subviews {
-            guard let slider = subview as? UISlider else { continue }
-            slider.setValue(currentVolume, animated: true)
-            slider.sendActionsForControlEvents(.TouchUpInside)
-        }
-    }
 
 }
 

        
        albumTitleLabel.font = .systemFontOfSize(15.0, weight: UIFontWeightThin)
        albumTitleLabel.textAlignment = .Center
        
        volumeSlider.minimumValue = 0.0
        volumeSlider.maximumValue = 1.0
        volumeSlider.value = AVAudioSession.sharedInstance().outputVolume
        volumeSlider.addTarget(self, action: "adjustVolume:", forControlEvents: .ValueChanged)
        
        self.updateCurrentTrack()
        

    private let nextTrackButton = UIButton(type: .Custom)
    private let prevTrackButton = UIButton(type: .Custom)
    private let musPickerButton = UIButton(type: .Custom)
    private let volumeSlider: UISlider = {
        return MPVolumeView().subviews.filter { $0 is UISlider }.map { $0 as! UISlider }.first!
    }()
    
    private var verticalConstraints: [NSLayoutConstraint] = []
    private var horizontalConstraints: [NSLayoutConstraint] = []
