objective c - iOS 9: How to change volume programmatically without showing system sound bar popup?

Question

I have to change the volume on iPad and using this code:

[[MPMusicPlayerController applicationMusicPlayer] setVolume:0];

But this changing volume and showing system volume bar on iPad. How to change the sound without showing the volume bar?

I know, setVolume: is deprecated, and everybody says to use MPVolumeView. If this is the only way to solve my problem, then how to change the volume using MPVolumeView? I don't see any method in MPVolumeView that changes the sound.
Should I use some another class together with MPVolumeView?

But it's preferable to use MPMusicPlayerController.

Thank you for advice!

Answer 1

For 2018, working on iOS 11.4

You need to change slider.value after a small delay.

extension MPVolumeView {
  static func setVolume(_ volume: Float) {
    let volumeView = MPVolumeView()
    let slider = volumeView.subviews.first(where: { $0 is UISlider }) as? UISlider

    DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 0.01) {
      slider?.value = volume
    }
  }
}

Usage:

MPVolumeView.setVolume(0.5)

Objective-C version