iOS 相机灰色导航条

在该页面添加

-(void)navigationController:(UINavigationController*)navigationController didShowViewController:(UIViewController*)viewController animated:(BOOL)animated{

    UINavigationBar*navigationBar = navigationController.navigationBar;

    [navigationBarsetBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];

    navigationBar.tintColor= [UIColorwhiteColor];

    [[UINavigationBar appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor whiteColor]}];

}