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avaudioplayer - How to enable audio scrubber in iOS Lock Screen control panel?

I have the following dictionary for MPNowPlayingInfoCenter

@{MPMediaItemPropertyAlbumTitle: @"First Title",
                                MPMediaItemPropertyArtwork: [[MPMediaItemArtwork alloc] initWithImage:[UIImage imageNamed:@"Album-Cover.jpg"]],
                                MPMediaItemPropertyPlaybackDuration:[NSNumber numberWithDouble:self.storyAudioPlayer.duration],
                                MPNowPlayingInfoPropertyElapsedPlaybackTime:[NSNumber numberWithDouble:self.storyAudioPlayer.currentTime],
                                MPNowPlayingInfoPropertyPlaybackRate:@1.0
                                }

Everything else is working fine but I can't seek songs using the slider. As shown in the image. What parameter am I missing?

Lock screen screenshot

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You can do it on iOS 9.1 and higher with help of MPRemoteCommandCenter and changePlaybackPositionCommand.

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