ios15从隐藏系统导航栏页面进入显示系统导航栏页面后，期望系统导航栏背景色为白色，但是导航栏背景变成黑色问题

self.navigationController.view.backgroundColor = [UIColor whiteColor];//设置系统导航栏及大背景颜色。      

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    [self.navigationController setNavigationBarHidden:NO animated:YES];//显示系统导航栏
    self.navigationController.navigationBar.translucent = YES;
    self.navigationController.view.backgroundColor = [UIColor whiteColor];//设置系统导航栏及大背景颜色。
    
    // 开启返回手势
    if ([self.navigationController respondsToSelector:@selector(interactivePopGestureRecognizer)]) {
        self.navigationController.interactivePopGestureRecognizer.enabled = YES;
    }
    //白色
    self.navigationController.navigationBar.barTintColor = [UIColor whiteColor];
    self.navigationController.view.backgroundColor = [UIColor whiteColor];
}