更改所有场景的导航栏颜色

Question

我是Objective-c的新手，我需要在所有场景中更改导航栏颜色。据我所知，这句话应该这样做：

UINavigationBar.Appearance.barTintColor = UIColor.Black;
UINavigationBar.Appearance.TintColor = UIColor.White;

但我不知道在哪里设置它们。

Answer 1

应在application:didFinishLaunchingWithOptions:中调用外观代理，即之前任何界面都有可能被创建。

Answer 2

    UINavigationBar *navigationBarAppearance = [UINavigationBar appearance];
    [navigationBarAppearance setBarTintColor:[UIColor ybnMediumGrayColor]];
    [navigationBarAppearance setTitleTextAttributes:@{NSFontAttributeName: [UIFont ybnProximaNovaSemiboldFontWithSize:22.0],
                                                  NSForegroundColorAttributeName: [UIColor whiteColor]}];

    UIBarButtonItem *barButtonItemAppearance = [UIBarButtonItem appearance];
    [barButtonItemAppearance setTitleTextAttributes:@{NSFontAttributeName: [UIFont ybnProximaNovaSemiboldFontWithSize:19.0]} forState:UIControlStateNormal];

尝试类似上面的代码。这对我有用。