MPRemoteCommandCenter *commandCenter = [MPRemoteCommandCenter sharedCommandCenter];

    [commandCenter.togglePlayPauseCommand addTargetWithHandler:^MPRemoteCommandHandlerStatus(MPRemoteCommandEvent * _Nonnull event) {
        NSLog(@"toggle button pressed");
        return MPRemoteCommandHandlerStatusSuccess;
    }];

[commandCenter.togglePlayPauseCommand addTarget:self action:@selector(toggleButtonAction)];

[commandCenter.togglePlayPauseCommand removeTarget:self];

[commandCenter.togglePlayPauseCommand removeTarget:self action:@selector(toggleButtonAction)];

@import MediaPlayer;