Do not display "return to previous app" displayed in the iOS status bar [Unity development]

I am developing with Unity.

I'm displaying the status bar in the iOS app, but I don't want to display "Return to previous app".

void _HidesBackButton ()

{

UINavigationController navigationController = (UINavigationController) UnityGetGLViewController ();

navigationController.navigationItem.hidesBackButton = YES;

}

I created a plug-in and called it, but "Return to previous app" was displayed.

How can I prevent it from being displayed?