I try to add volume adjust in my app with this code but not work properly warning given this.
@property (nonatomic, strong) MPVolumeView *volumeView;
_volumeView = [ [MPVolumeView alloc] init];
[_volumeView setShowsVolumeSlider:YES];
[_volumeView setShowsRouteButton:YES];
[_volumeView sizeToFit];
[self.view addSubview:_volumeView];
but this warning given
2018-11-05 15:55:14.898262+0530 BestBubby[7379:198945] [MediaRemote] [AVOutputContext] WARNING: AVF context unavailable for +[MRAVOutputContext sharedAudioPresentationContext]_block_invoke
2018-11-05 15:55:14.898488+0530 BestBubby[7379:198945] [MediaRemote] [AVOutputContext] WARNING: AVF context unavailable for +[MRAVOutputContext createOutputContextWithUniqueIdentifier:]