导航栏标题没有改变[重复]

Question

这是 AppDelegate 代码，我正在运行 swift 5。您对为什么我的导航栏标题颜色仍然是黑色有任何想法吗？

var navigationBarAppearance = UINavigationBar.appearance()
var tabBarAppearance = UITabBar.appearance()

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

    FirebaseApp.configure()
    navigationBarAppearance.tintColor = UIColor.white
    tabBarAppearance.tintColor = UIColor.white
    navigationBarAppearance.titleTextAttributes = [NSAttributedString.Key.foregroundColor:UIColor.white]
    print(Realm.Configuration.defaultConfiguration.fileURL!)
    do{
        let _ = try Realm()
    }catch{
        print("Error initializing new realm, \(error)")
    }

    return true
}

Answer 1

在方法中添加这些行

var navigationBarAppearance = UINavigationBar.appearance()
var tabBarAppearance = UITabBar.appearance()

应该是这样的

 func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {

    FirebaseApp.configure()
    var navigationBarAppearance = UINavigationBar.appearance()
    var tabBarAppearance = UITabBar.appearance()
    navigationBarAppearance.tintColor = UIColor.white
    navigationBarAppearance.barTintColor = UIColor.white
    tabBarAppearance.tintColor = UIColor.white
    navigationBarAppearance.titleTextAttributes = [NSAttributedString.Key.foregroundColor:UIColor.white]
    print(Realm.Configuration.defaultConfiguration.fileURL!)
    do{
        let _ = try Realm()
    }catch{
        print("Error initializing new realm, \(error)")
    }

    return true
}

最后，我了解您的问题，它仅适用于最新的 ios。如果您使用的是 ios 13.4.1
，您还需要一些附加功能 然后使用此代码：

 let coloredAppearance = UINavigationBarAppearance()
 coloredAppearance.configureWithOpaqueBackground()
 coloredAppearance.tintColor = UIColor.white
 coloredAppearance.barTintColor = UIColor.white
 ....         
UINavigationBar.appearance().standardAppearance = coloredAppearance
UINavigationBar.appearance().scrollEdgeAppearance = coloredAppearance

应该没问题。