UICollectionViewController和UIViewController

Question

我是Swift的新手。我有3 UIViewControllers：

1. MainScreenController
2. RegistrationFormController
3. LoginFormController

和1 UITabBarController

1. MainTabBarController

和2 ColletionViewControllers：

1. VideoController
2. TopVideoController

当我点击LoginFormController上的按钮打开MainTabBarController并显示2 ColletionViewControllers似乎是错误时，错误如下所示：

  必须使用非零布局参数初始化

＆＃39; UICollectionView＆＃39;

的AppDelegate：

class CustomNavigationController: UINavigationController {
   override var preferredStatusBarStyle: UIStatusBarStyle {
      return .lightContent
    }
}

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?
var navigationController: UINavigationController?

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

    window = UIWindow(frame: UIScreen.main.bounds)

    if let window = window {
        let mainVC = MainScreenController()
        navigationController = CustomNavigationController(rootViewController: mainVC)
        window.rootViewController = navigationController
        window.makeKeyAndVisible()
    }

    UINavigationBar.appearance().isTranslucent = false
    UINavigationBar.appearance().tintColor = .white
    UINavigationBar.appearance().barTintColor = UIColor.darkBlue
    UINavigationBar.appearance().titleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.white]
    UINavigationBar.appearance().largeTitleTextAttributes = [NSAttributedStringKey.foregroundColor: UIColor.white]

    FirebaseApp.configure()
    return true
}

帮助我了解它的工作原理。

Answer 1

从Apple Documentation开始，您需要在初始化集合视图控制器时使用init(frame: CGRect, collectionViewLayout layout: UICollectionViewLayout)。