How to change device Volume on iOS - not music volume

Question

I want to change the device volume on iOS (iphone).

I know that i can change the volume of music library with this lines below:

//implement at firs         


        

Answer 1

Here's what I've done:

func setSystemVolume(volume: Float) {
    let volumeView = MPVolumeView()

    for view in volumeView.subviews {
        if (NSStringFromClass(view.classForCoder) == "MPVolumeSlider") {
            let slider = view as! UISlider
            slider.setValue(volume, animated: false)
        }
    }
}

As property volume in MPMusicPlayerController was deprecate in iOS 7. This is only method you can do that.