iOS Question [SOLVED] Hide Mediaplayer on lockscreen

#PlistExtra: <key>UIBackgroundModes</key><array><string>location</string><string>audio</string></array>

Sub start_warning
    
    ' // do notification
    If tmrBackground.Enabled Then
        UNC.CreateNotificationWithContent("Health Check","Are you OK ?", "healthcheck_1", "", 1000)        
    End If
    
    mpOK.Initialize(File.DirAssets,"ok_chime_1.mp3","")    
    mpOK.looping = True
    mpOK.play
    
    tmrCheckShake.Enabled = True
    inWarning = True
    mod_functions.writeLog($"main(), start_warning ${inWarning}"$)
    
        
    CallSubDelayed(Me,"confirmOK")
    
End Sub

- (void)setAudioSession {
  AVAudioSession *audioSession = [AVAudioSession sharedInstance];
  NSError *err = nil;
  BOOL success = [audioSession setCategory:AVAudioSessionCategoryPlayback withOptions:AVAudioSessionCategoryOptionDuckOthers error:&err];
  if (success) {
     success = [audioSession setActive:YES error:&err];
   success = [audioSession setPreferredSampleRate:4096 error:nil];
   [[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
  }
  if (!success)
  [NSException raise:@"" format:@"Error setting audio session: %@", err];
}