FirebaseAuthUI IOS - 如何添加登錄屏幕背景圖片？

Question

我想在登錄屏幕的登錄按鈕後添加一個圖像。目前，我得到了以下錯誤消息：

終止應用程序由於未捕獲的異常「NSInternalInconsistencyException」，理由是：「在包無法加載NIB：」一個NSBundle < ...>與名稱...

這裏我的代碼：

在AppDelegate中：

class AppDelegate: UIResponder, UIApplicationDelegate { 

    var window: UIWindow? 
    var authHandle: AuthStateDidChangeListenerHandle? 
    var userInfo:User! 

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

     //checkLoggedIn 
     authHandle = Auth.auth().addStateDidChangeListener { auth, user in 
      if let user = user { 
       self.userInfo = user 
      } else { 
       // No user is signed in. 
       self.login() 
      } 
     } 

     return true 
    } 

func login() { 
     let authUI = FUIAuth.defaultAuthUI() 
     authUI?.delegate = self as? FUIAuthDelegate 

     let providers: [FUIAuthProvider] = [ 
      FUIFacebookAuth() 
     ] 
     authUI?.providers = providers 

     // Present the auth view controller and then implement the sign in callback. 
     let authViewController = CustomAuthViewController(authUI: authUI!) 
     self.window?.rootViewController?.present(authViewController, animated: false, completion: nil) 
    } 

    func authPickerViewController(for authUI: FUIAuth) -> FUIAuthPickerViewController { 
     return CustomAuthViewController(nibName: "CustomAuthViewController", 
             bundle: Bundle.main, 
             authUI: authUI) 
    } 
} 

在CustomAuthViewController：

class CustomAuthViewController: FUIAuthPickerViewController { 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     // Do any additional setup after loading the view. 

     let width = UIScreen.main.bounds.size.width 
     let height = UIScreen.main.bounds.size.height 

     let imageViewBackground = UIImageView(frame: CGRect(x: 0, y: 0, width: width, height: height)) 
     imageViewBackground.image = UIImage(named: "myimage") 

     // you can change the content mode: 
     imageViewBackground.contentMode = UIViewContentMode.scaleToFill 

     view.insertSubview(imageViewBackground, at: 0) 
    } 

你看到有什麼問題嗎？我不確定authPickerViewController函數應該在我的AppDelegate中，你能確認它沒問題嗎？我發現this後和this one但我不能讓它工作。 我使用Firebase-UI 4.1.1，我的登錄流程沒有背景圖片（所以沒有CustomPickerViewController）。

謝謝

亞歷

Answer 1

這就是我的個性覆蓋的樣子：

import UIKit 
import FirebaseAuthUI 

class BizzyAuthViewController: FUIAuthPickerViewController { 


    override init(nibName: String?, bundle: Bundle?, authUI: FUIAuth) { 
     super.init(nibName: "FUIAuthPickerViewController", bundle: bundle, authUI: authUI) 
    } 

    required init?(coder aDecoder: NSCoder) { 
     super.init(coder: aDecoder) 
    } 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     // Do any additional setup after loading the view. 

     let width = UIScreen.main.bounds.size.width 
     let height = UIScreen.main.bounds.size.height 

     let imageViewBackground = UIImageView(frame: CGRect(x: 0, y: 0, width: width, height: height)) 
     imageViewBackground.image = UIImage(named: "lavenderWithBees") 

     // you can change the content mode: 
     imageViewBackground.contentMode = UIViewContentMode.scaleAspectFill 

     view.insertSubview(imageViewBackground, at: 0) 

    } 

} 

而這正是我的登錄功能（ 「ViewController.swift」 內）是這樣的：

func login() { 

    //FirebaseApp.configure() 
    let authUI = FUIAuth.defaultAuthUI() 
    let providers: [FUIAuthProvider] = [FUIGoogleAuth(), FUIFacebookAuth()] 
    authUI?.providers = providers 
    authUI?.delegate = self as FUIAuthDelegate 

    let authViewController = BizzyAuthViewController(authUI: authUI!) 
    let navc = UINavigationController(rootViewController: authViewController) 
    self.present(navc, animated: true, completion: nil) 

}