When I push to set the navigationBar of the current view controller to be fully transparent,

- (void)viewDidLoad {
    [super viewDidLoad];
//     Do any additional setup after loading the view from its nib.
    //设定字体颜色
    self.navigationController.navigationBar.tintColor = [UIColor whiteColor];
    //设定背景图片为空
    [self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
    //半透明
    //self.navigationController.navigationBar.translucent = YES;
    //
    //self.edgesForExtendedLayout = UIRectEdgeNone;
}

- (UIStatusBarStyle)preferredStatusBarStyle {
    return UIStatusBarStyleLightContent;
}

However, the status bar at the top is completely black.
My upper-level VC also uses preferredStatusBarStyle, but there is no problem with the display. The difference is that the upper-level VC hides the NavigationBar, but when pushing to the current VC, the NavigationBar is displayed..
Please help me!