使用 Xcode 11.3 在 iOS 13 上未显示柱状图

Question

UITabBar 未在 iOS 13.2

上显示

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        FirebaseApp.configure()

        window = UIWindow(frame: UIScreen.main.bounds)
        let rootViewController = UITabBarController()
        rootViewController.viewControllers = [RecordController()]
        window?.rootViewController = rootViewController
        window?.makeKeyAndVisible()

        return true
    }
}

和 UINavigationBar 未在 iOS 13.2

上显示

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // Override point for customization after application launch.
        FirebaseApp.configure()

        window = UIWindow(frame: UIScreen.main.bounds)
        window?.rootViewController = UINavigationController(rootViewController: RecordController())
        window?.makeKeyAndVisible()

        return true
    }
}

这对 iOS 12 岁及以上

非常有效

Answer 1

如果您使用 13.2，则需要替换 Scene Delegate 中的代码。如果您的 xcode 中没有场景委托，则在 didFinishLaunchingWithOptions 委托中使用此条件。

希望它对你有用。谢谢

    if #available(iOS 13, *) {
        return //code for ios 13
    } else {
        return // code for ios 12 or lower version
    }

使用 Xcode 11.3 在 iOS 13 上未显示柱状图

Bars not showing on iOS 13 using Xcode 11.3

swift

ios13.2

xcode11.3